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Angela Marie Ditran Leff

Examiner (ID: 14493)

Most Active Art Unit
3674
Art Unit(s)
3674, 3676
Total Applications
1207
Issued Applications
793
Pending Applications
98
Abandoned Applications
329

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 20498830 [patent_doc_number] => 20260028288 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-29 [patent_title] => EUTECTIC METAL ALLOY-CONTAINING CEMENT AND METHODS OF USE THEREOF [patent_app_type] => utility [patent_app_number] => 19/345721 [patent_app_country] => US [patent_app_date] => 2025-09-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19345721 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/345721
EUTECTIC METAL ALLOY-CONTAINING CEMENT AND METHODS OF USE THEREOF Sep 29, 2025 Pending
Array ( [id] => 20935900 [patent_doc_number] => 20260242657 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-08-20 [patent_title] => METHOD FOR MODIFYING THE PERMEABILITY OF A SUBTERRANEAN FORMATION AND RELATED TREATMENT FLUID USED IN SAID METHOD [patent_app_type] => utility [patent_app_number] => 19/471173 [patent_app_country] => US [patent_app_date] => 2024-03-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2668 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 78 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19471173 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/471173
METHOD FOR MODIFYING THE PERMEABILITY OF A SUBTERRANEAN FORMATION AND RELATED TREATMENT FLUID USED IN SAID METHOD Sep 29, 2025 Pending
Array ( [id] => 20639847 [patent_doc_number] => 20260098200 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-04-09 [patent_title] => ASPHALTENE AND PARAFFIN WAX DEPOSIT REMOVAL WITH SILICA NANOPARTICLES [patent_app_type] => utility [patent_app_number] => 19/346218 [patent_app_country] => US [patent_app_date] => 2025-09-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2453 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 74 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19346218 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/346218
ASPHALTENE AND PARAFFIN WAX DEPOSIT REMOVAL WITH SILICA NANOPARTICLES Sep 29, 2025 Pending
Array ( [id] => 20459529 [patent_doc_number] => 20260008952 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-08 [patent_title] => METHODS FOR MICROBIAL GAS PRODUCTION AND USE AS ISOTOPIC TRACER [patent_app_type] => utility [patent_app_number] => 19/322920 [patent_app_country] => US [patent_app_date] => 2025-09-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 103 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19322920 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/322920
METHODS FOR MICROBIAL GAS PRODUCTION AND USE AS ISOTOPIC TRACER Sep 8, 2025 Pending
Array ( [id] => 20393409 [patent_doc_number] => 20250368884 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-12-04 [patent_title] => FLUID LOSS CONTROL AGENT FOR AQUEOUS WELLBORE FLUIDS [patent_app_type] => utility [patent_app_number] => 19/302807 [patent_app_country] => US [patent_app_date] => 2025-08-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3042 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 70 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19302807 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/302807
FLUID LOSS CONTROL AGENT FOR AQUEOUS WELLBORE FLUIDS Aug 17, 2025 Pending
Array ( [id] => 20393412 [patent_doc_number] => 20250368887 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-12-04 [patent_title] => METHODS AND COMPOSITIONS USED IN CONTROLLING FORMATION SAND PRODUCTION, PROPPANT FLOWBACK, AND FINES MIGRATION [patent_app_type] => utility [patent_app_number] => 19/296375 [patent_app_country] => US [patent_app_date] => 2025-08-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6631 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 59 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19296375 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/296375
METHODS AND COMPOSITIONS USED IN CONTROLLING FORMATION SAND PRODUCTION, PROPPANT FLOWBACK, AND FINES MIGRATION Aug 10, 2025 Pending
Array ( [id] => 20542352 [patent_doc_number] => 20260049242 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-02-19 [patent_title] => EMULSIFIED ACID SYSTEM FOR DRAG REDUCTION IN SUBTERRANEAN WELLS [patent_app_type] => utility [patent_app_number] => 19/282884 [patent_app_country] => US [patent_app_date] => 2025-07-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8776 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 148 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19282884 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/282884
EMULSIFIED ACID SYSTEM FOR DRAG REDUCTION IN SUBTERRANEAN WELLS Jul 27, 2025 Pending
Array ( [id] => 20364238 [patent_doc_number] => 20250354050 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-11-20 [patent_title] => COMBINATION PRODUCTS CONTAINING ANTI-AGGLOMERANT LOW DOSE HYDRATE INHIBITORS AND CORROSION INHIBITORS WITH IMPROVED CORROSION RESISTANCE [patent_app_type] => utility [patent_app_number] => 19/279818 [patent_app_country] => US [patent_app_date] => 2025-07-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7764 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19279818 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/279818
COMBINATION PRODUCTS CONTAINING ANTI-AGGLOMERANT LOW DOSE HYDRATE INHIBITORS AND CORROSION INHIBITORS WITH IMPROVED CORROSION RESISTANCE Jul 23, 2025 Pending
Array ( [id] => 20486420 [patent_doc_number] => 20260022618 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-22 [patent_title] => APPARATUS AND METHODS FOR FORMING FORMATION-TO-FORMATION SEALS IN A WELLBORE [patent_app_type] => utility [patent_app_number] => 19/275566 [patent_app_country] => US [patent_app_date] => 2025-07-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 13457 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 86 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19275566 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/275566
APPARATUS AND METHODS FOR FORMING FORMATION-TO-FORMATION SEALS IN A WELLBORE Jul 20, 2025 Pending
Array ( [id] => 20486428 [patent_doc_number] => 20260022626 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-22 [patent_title] => ARTIFICIAL LIFT SYSTEM FOR HYDROCARBON WELLS USING OLEOPHILIC MATERIALS [patent_app_type] => utility [patent_app_number] => 19/275901 [patent_app_country] => US [patent_app_date] => 2025-07-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 80 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19275901 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/275901
ARTIFICIAL LIFT SYSTEM FOR HYDROCARBON WELLS USING OLEOPHILIC MATERIALS Jul 20, 2025 Pending
Array ( [id] => 20220057 [patent_doc_number] => 20250282988 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-09-11 [patent_title] => SPACER FLUIDS CONTAINING SWELLABLE ABRASIVE PARTICLES [patent_app_type] => utility [patent_app_number] => 19/212276 [patent_app_country] => US [patent_app_date] => 2025-05-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 46 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19212276 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/212276
SPACER FLUIDS CONTAINING SWELLABLE ABRASIVE PARTICLES May 18, 2025 Pending
Array ( [id] => 20349949 [patent_doc_number] => 20250346801 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-11-13 [patent_title] => Method for Removing Metal Contaminants [patent_app_type] => utility [patent_app_number] => 19/203582 [patent_app_country] => US [patent_app_date] => 2025-05-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 610 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 72 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19203582 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/203582
Method for Removing Metal Contaminants May 8, 2025 Pending
Array ( [id] => 20121752 [patent_doc_number] => 20250236783 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-07-24 [patent_title] => BLOWING AGENT INCORPORATED RESIN SYSTEMS FOR CONSOLIDATING SUBTERRANEAN OIL AND GAS BEARING FORMATIONS [patent_app_type] => utility [patent_app_number] => 19/173675 [patent_app_country] => US [patent_app_date] => 2025-04-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1905 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => 0 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19173675 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/173675
BLOWING AGENT INCORPORATED RESIN SYSTEMS FOR CONSOLIDATING SUBTERRANEAN OIL AND GAS BEARING FORMATIONS Apr 7, 2025 Pending
Array ( [id] => 20321920 [patent_doc_number] => 20250334008 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-30 [patent_title] => METHOD FOR TREATING A WELL BORE FOR DEHYDROSULFURIZATION [patent_app_type] => utility [patent_app_number] => 19/074580 [patent_app_country] => US [patent_app_date] => 2025-03-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4859 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 2 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19074580 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/074580
METHOD FOR TREATING A WELL BORE FOR DEHYDROSULFURIZATION Mar 9, 2025 Pending
Array ( [id] => 20059492 [patent_doc_number] => 20250197714 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-19 [patent_title] => IN-SITU COMPOSITE POLYMERIC STRUCTURES FOR FAR-FIELD DIVERSION DURING HYDRAULIC FRACTURING [patent_app_type] => utility [patent_app_number] => 19/068505 [patent_app_country] => US [patent_app_date] => 2025-03-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2597 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 104 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19068505 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/068505
In-situ composite polymeric structures for far-field diversion during hydraulic fracturing Mar 2, 2025 Issued
Array ( [id] => 20016179 [patent_doc_number] => 20250154401 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-05-15 [patent_title] => REDUCED-POLYMER-LOADING, HIGH-TEMPERATURE FRACTURING FLUIDS AND METHODS AND SYSTEMS RELATED THERETO [patent_app_type] => utility [patent_app_number] => 19/022657 [patent_app_country] => US [patent_app_date] => 2025-01-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1867 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 76 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19022657 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/022657
REDUCED-POLYMER-LOADING, HIGH-TEMPERATURE FRACTURING FLUIDS AND METHODS AND SYSTEMS RELATED THERETO Jan 14, 2025 Pending
Array ( [id] => 19890491 [patent_doc_number] => 20250115803 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-04-10 [patent_title] => SCALE INHIBITOR SQUEEZE TREATMENT [patent_app_type] => utility [patent_app_number] => 18/982827 [patent_app_country] => US [patent_app_date] => 2024-12-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4691 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 71 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18982827 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/982827
SCALE INHIBITOR SQUEEZE TREATMENT Dec 15, 2024 Pending
Array ( [id] => 19846951 [patent_doc_number] => 20250092302 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-03-20 [patent_title] => METHOD FOR REDUCING THE VISCOSITY OF HEAVY OIL FOR EXTRACTION, TRANSPORT IN PIPES, AND CLEANING THEREOF [patent_app_type] => utility [patent_app_number] => 18/965998 [patent_app_country] => US [patent_app_date] => 2024-12-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10252 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 70 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18965998 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/965998
METHOD FOR REDUCING THE VISCOSITY OF HEAVY OIL FOR EXTRACTION, TRANSPORT IN PIPES, AND CLEANING THEREOF Dec 1, 2024 Pending
Array ( [id] => 20744478 [patent_doc_number] => 12644377 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-06-02 [patent_title] => Method of using non-magnetic solid tracers [patent_app_type] => utility [patent_app_number] => 18/953826 [patent_app_country] => US [patent_app_date] => 2024-11-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 3574 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 304 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18953826 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/953826
Method of using non-magnetic solid tracers Nov 19, 2024 Issued
Array ( [id] => 20007659 [patent_doc_number] => 20250145881 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-05-08 [patent_title] => COMPOSITIONS AND METHODS FOR GAS LIFTED WELL DELIQUIFICATION [patent_app_type] => utility [patent_app_number] => 18/936748 [patent_app_country] => US [patent_app_date] => 2024-11-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1361 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 117 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18936748 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/936748
COMPOSITIONS AND METHODS FOR GAS LIFTED WELL DELIQUIFICATION Nov 3, 2024 Pending
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