Search

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] => 19884570 [patent_doc_number] => 12270266 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2025-04-08 [patent_title] => Method of removing hydrogen sulfide from a subterranean geological formation with an imidazolate-based nanomaterial in an oil-based drilling fluid [patent_app_type] => utility [patent_app_number] => 18/648003 [patent_app_country] => US [patent_app_date] => 2024-04-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 9 [patent_no_of_words] => 9204 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 123 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18648003 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/648003
Method of removing hydrogen sulfide from a subterranean geological formation with an imidazolate-based nanomaterial in an oil-based drilling fluid Apr 25, 2024 Issued
Array ( [id] => 20309334 [patent_doc_number] => 20250326963 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-23 [patent_title] => DRILLING WITH WATER-BASED MUD INCLUDING MULTIPLE CLAYS [patent_app_type] => utility [patent_app_number] => 18/643715 [patent_app_country] => US [patent_app_date] => 2024-04-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2030 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [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] => 18643715 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/643715
DRILLING WITH WATER-BASED MUD INCLUDING MULTIPLE CLAYS Apr 22, 2024 Pending
Array ( [id] => 20241135 [patent_doc_number] => 12421444 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-09-23 [patent_title] => Polymers and nanoparticles for flooding [patent_app_type] => utility [patent_app_number] => 18/635495 [patent_app_country] => US [patent_app_date] => 2024-04-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 13 [patent_no_of_words] => 1036 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 82 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18635495 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/635495
Polymers and nanoparticles for flooding Apr 14, 2024 Issued
Array ( [id] => 20295157 [patent_doc_number] => 20250320400 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-16 [patent_title] => CORROSION INHIBITOR AND RELATED METHODS OF INHIBITING CORROSION [patent_app_type] => utility [patent_app_number] => 18/633610 [patent_app_country] => US [patent_app_date] => 2024-04-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1057 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -21 [patent_words_short_claim] => 126 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18633610 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/633610
CORROSION INHIBITOR AND RELATED METHODS OF INHIBITING CORROSION Apr 11, 2024 Pending
Array ( [id] => 20295161 [patent_doc_number] => 20250320404 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-16 [patent_title] => METHODS FOR STABILIZING SUBTERRANEAN FORMATIONS [patent_app_type] => utility [patent_app_number] => 18/631863 [patent_app_country] => US [patent_app_date] => 2024-04-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1668 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 69 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18631863 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/631863
METHODS FOR STABILIZING SUBTERRANEAN FORMATIONS Apr 9, 2024 Pending
Array ( [id] => 20492797 [patent_doc_number] => 12534660 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-01-27 [patent_title] => Methods for cementing wellbores utilizing spacer fluids that include surfactant packages [patent_app_type] => utility [patent_app_number] => 18/631829 [patent_app_country] => US [patent_app_date] => 2024-04-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 3685 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 200 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18631829 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/631829
Methods for cementing wellbores utilizing spacer fluids that include surfactant packages Apr 9, 2024 Issued
Array ( [id] => 20730681 [patent_doc_number] => 12637931 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-05-26 [patent_title] => Method for generating CO2 in situ for oilfield applications using propylene carbonate [patent_app_type] => utility [patent_app_number] => 18/626253 [patent_app_country] => US [patent_app_date] => 2024-04-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 115 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18626253 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/626253
Method for generating CO2 in situ for oilfield applications using propylene carbonate Apr 2, 2024 Issued
Array ( [id] => 19809652 [patent_doc_number] => 12241023 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-03-04 [patent_title] => In-situ composite polymeric structures for far-field diversion during hydraulic fracturing [patent_app_type] => utility [patent_app_number] => 18/623159 [patent_app_country] => US [patent_app_date] => 2024-04-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 10 [patent_no_of_words] => 7561 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 129 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18623159 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/623159
In-situ composite polymeric structures for far-field diversion during hydraulic fracturing Mar 31, 2024 Issued
Array ( [id] => 20511509 [patent_doc_number] => 20260035610 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-02-05 [patent_title] => TEMPERATURE-SENSITIVE FOAMING DRAINAGE AGENT SYSTEM FOR HIGH-TEMPERATURE AND HIGH-SALT GAS RESERVOIRS, PREPARATION METHOD AND APPLICATION THEREOF [patent_app_type] => utility [patent_app_number] => 18/621454 [patent_app_country] => US [patent_app_date] => 2024-03-29 [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] => 339 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18621454 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/621454
TEMPERATURE-SENSITIVE FOAMING DRAINAGE AGENT SYSTEM FOR HIGH-TEMPERATURE AND HIGH-SALT GAS RESERVOIRS, PREPARATION METHOD AND APPLICATION THEREOF Mar 28, 2024 Pending
Array ( [id] => 20505999 [patent_doc_number] => 12540268 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-02-03 [patent_title] => Method for stabilizing wellbore, stabilized wellbore and wellbore stabilizing fluid [patent_app_type] => utility [patent_app_number] => 18/620446 [patent_app_country] => US [patent_app_date] => 2024-03-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 10 [patent_no_of_words] => 0 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 103 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18620446 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/620446
Method for stabilizing wellbore, stabilized wellbore and wellbore stabilizing fluid Mar 27, 2024 Issued
Array ( [id] => 20279609 [patent_doc_number] => 20250304851 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-02 [patent_title] => METHODS AND COMPOSITIONS USED IN CONTROLLING FORMATION SAND PRODUCTION, PROPPANT FLOWBACK, AND FINES MIGRATION [patent_app_type] => utility [patent_app_number] => 18/620285 [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] => 6927 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [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] => 18620285 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/620285
METHODS AND COMPOSITIONS USED IN CONTROLLING FORMATION SAND PRODUCTION, PROPPANT FLOWBACK, AND FINES MIGRATION Mar 27, 2024 Abandoned
Array ( [id] => 20280150 [patent_doc_number] => 20250305392 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-02 [patent_title] => CARBON DIOXIDE MINERALIZATION AND STORAGE [patent_app_type] => utility [patent_app_number] => 18/619731 [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] => 1292 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [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] => 18619731 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/619731
Carbon dioxide mineralization and storage Mar 27, 2024 Issued
Array ( [id] => 19479655 [patent_doc_number] => 20240327697 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-10-03 [patent_title] => ALUMINIUM NANOPARTICLE CORROSION INHIBITOR ADDITIVES [patent_app_type] => utility [patent_app_number] => 18/617838 [patent_app_country] => US [patent_app_date] => 2024-03-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 13500 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 63 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18617838 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/617838
ALUMINIUM NANOPARTICLE CORROSION INHIBITOR ADDITIVES Mar 26, 2024 Pending
Array ( [id] => 20343615 [patent_doc_number] => 12467339 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-11-11 [patent_title] => Carbon dioxide mineralization and storage [patent_app_type] => utility [patent_app_number] => 18/596472 [patent_app_country] => US [patent_app_date] => 2024-03-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 0 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 240 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18596472 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/596472
Carbon dioxide mineralization and storage Mar 4, 2024 Issued
Array ( [id] => 19248954 [patent_doc_number] => 20240199941 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-06-20 [patent_title] => METHOD FOR SELECTING SCALE DISPERSANT [patent_app_type] => utility [patent_app_number] => 18/592705 [patent_app_country] => US [patent_app_date] => 2024-03-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7365 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 85 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18592705 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/592705
METHOD FOR SELECTING SCALE DISPERSANT Feb 29, 2024 Pending
Array ( [id] => 20194194 [patent_doc_number] => 20250270904 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-08-28 [patent_title] => Remediating Failed Isolation in Plug-and-Perforation Operations [patent_app_type] => utility [patent_app_number] => 18/588998 [patent_app_country] => US [patent_app_date] => 2024-02-27 [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] => -12 [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] => 18588998 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/588998
Remediating failed isolation in plug-and-perforation operations Feb 26, 2024 Issued
Array ( [id] => 20121603 [patent_doc_number] => 20250236634 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-07-24 [patent_title] => ALKYL POLYGLYCOSIDE DERIVATIVES [patent_app_type] => utility [patent_app_number] => 18/416595 [patent_app_country] => US [patent_app_date] => 2024-01-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2387 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -22 [patent_words_short_claim] => 24 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18416595 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/416595
ALKYL POLYGLYCOSIDE DERIVATIVES Jan 17, 2024 Pending
Array ( [id] => 20264285 [patent_doc_number] => 12435261 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-10-07 [patent_title] => Methods for microbial gas production and use as isotopic tracer [patent_app_type] => utility [patent_app_number] => 18/393361 [patent_app_country] => US [patent_app_date] => 2023-12-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 11 [patent_no_of_words] => 0 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 257 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18393361 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/393361
Methods for microbial gas production and use as isotopic tracer Dec 20, 2023 Issued
Array ( [id] => 19098486 [patent_doc_number] => 20240117714 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-04-11 [patent_title] => METHOD FOR INCREASING CRUDE OIL PRODUCTION BY CO2 STORAGE IN AQUIFER AND DUMPFLOODING [patent_app_type] => utility [patent_app_number] => 18/393277 [patent_app_country] => US [patent_app_date] => 2023-12-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2746 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => 0 [patent_words_short_claim] => 464 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18393277 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/393277
METHOD FOR INCREASING CRUDE OIL PRODUCTION BY CO2 STORAGE IN AQUIFER AND DUMPFLOODING Dec 20, 2023 Abandoned
Array ( [id] => 19098008 [patent_doc_number] => 20240117236 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-04-11 [patent_title] => MIXTURE FOR PRE-CEMENTING OPERATION IN WELLBORE [patent_app_type] => utility [patent_app_number] => 18/543002 [patent_app_country] => US [patent_app_date] => 2023-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6931 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 47 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18543002 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/543002
Mixture for pre-cementing operation in wellbore Dec 17, 2023 Issued
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