Search

David W. Duffy

Examiner (ID: 5121, Phone: (571)272-1574 , Office: P/3716 )

Most Active Art Unit
3716
Art Unit(s)
3715, 3700, 3716, 3714
Total Applications
565
Issued Applications
295
Pending Applications
21
Abandoned Applications
252

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 20201421 [patent_doc_number] => 12404190 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-09-02 [patent_title] => Resource utilization-oriented treatment method for spent electroless nickel plating bath [patent_app_type] => utility [patent_app_number] => 17/918369 [patent_app_country] => US [patent_app_date] => 2020-12-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 1246 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 214 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17918369 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/918369
Resource utilization-oriented treatment method for spent electroless nickel plating bath Dec 29, 2020 Issued
Array ( [id] => 16915586 [patent_doc_number] => 20210188678 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-06-24 [patent_title] => SYSTEMS AND METHODS FOR PURIFYING AQUEOUS SOLUTIONS [patent_app_type] => utility [patent_app_number] => 17/124891 [patent_app_country] => US [patent_app_date] => 2020-12-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 20492 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 498 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17124891 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/124891
SYSTEMS AND METHODS FOR PURIFYING AQUEOUS SOLUTIONS Dec 16, 2020 Abandoned
Array ( [id] => 18165794 [patent_doc_number] => 20230032395 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-02-02 [patent_title] => METHODS FOR PREPARING MICROCAPILLARY CARBON MOLECULAR SIEVE MEMBRANES [patent_app_type] => utility [patent_app_number] => 17/788594 [patent_app_country] => US [patent_app_date] => 2020-12-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5449 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 162 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17788594 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/788594
Methods for preparing microcapillary carbon molecular sieve membranes Dec 15, 2020 Issued
Array ( [id] => 18180414 [patent_doc_number] => 20230041143 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-02-09 [patent_title] => USING DAPHNIA FOR BIOREMEDIATION [patent_app_type] => utility [patent_app_number] => 17/783808 [patent_app_country] => US [patent_app_date] => 2020-12-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14252 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [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] => 17783808 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/783808
Using Daphnia for bioremediation Dec 8, 2020 Issued
Array ( [id] => 20255148 [patent_doc_number] => 12427482 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-09-30 [patent_title] => Membrane distiller and operation method therefore [patent_app_type] => utility [patent_app_number] => 17/783157 [patent_app_country] => US [patent_app_date] => 2020-12-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 21 [patent_no_of_words] => 2312 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 138 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17783157 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/783157
Membrane distiller and operation method therefore Dec 8, 2020 Issued
Array ( [id] => 16991616 [patent_doc_number] => 20210230036 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-07-29 [patent_title] => PROCESS FOR REMOVING SILICA FROM HIGH PH BRINES PRODUCED BY EVAPORATION IN THE COURSE OF TREATING PRODUCED WATER [patent_app_type] => utility [patent_app_number] => 17/253220 [patent_app_country] => US [patent_app_date] => 2020-12-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3330 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 254 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17253220 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/253220
PROCESS FOR REMOVING SILICA FROM HIGH PH BRINES PRODUCED BY EVAPORATION IN THE COURSE OF TREATING PRODUCED WATER Dec 3, 2020 Abandoned
Array ( [id] => 18748541 [patent_doc_number] => 11807839 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-07 [patent_title] => Plant and process for obtaining clear must from grapes and for vinification [patent_app_type] => utility [patent_app_number] => 17/112444 [patent_app_country] => US [patent_app_date] => 2020-12-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 3734 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 77 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17112444 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/112444
Plant and process for obtaining clear must from grapes and for vinification Dec 3, 2020 Issued
Array ( [id] => 20592505 [patent_doc_number] => 12576201 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-03-17 [patent_title] => Methods for isolating umbilical cord blood plasma products, tissue and cellular exosomes, and compositions and methods of use thereof [patent_app_type] => utility [patent_app_number] => 17/756016 [patent_app_country] => US [patent_app_date] => 2020-11-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 9 [patent_no_of_words] => 12551 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 185 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17756016 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/756016
Methods for isolating umbilical cord blood plasma products, tissue and cellular exosomes, and compositions and methods of use thereof Nov 24, 2020 Issued
Array ( [id] => 17185057 [patent_doc_number] => 20210331942 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-10-28 [patent_title] => METHODS FOR ONLINE CONTROL OF A CHEMICAL TREATMENT SOLUTION USING SCALE SATURATION INDICES [patent_app_type] => utility [patent_app_number] => 17/103018 [patent_app_country] => US [patent_app_date] => 2020-11-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5486 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 88 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17103018 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/103018
Methods for online control of a chemical treatment solution using scale saturation indices Nov 23, 2020 Issued
Array ( [id] => 18460653 [patent_doc_number] => 11684932 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-06-27 [patent_title] => Vinasse treatment process by flotation in flow [patent_app_type] => utility [patent_app_number] => 16/952634 [patent_app_country] => US [patent_app_date] => 2020-11-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 6 [patent_no_of_words] => 3509 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 598 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16952634 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/952634
Vinasse treatment process by flotation in flow Nov 18, 2020 Issued
Array ( [id] => 17611335 [patent_doc_number] => 20220153614 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-05-19 [patent_title] => LIQUID PROCESSING APPARATUS [patent_app_type] => utility [patent_app_number] => 16/951369 [patent_app_country] => US [patent_app_date] => 2020-11-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3001 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 107 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16951369 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/951369
Liquid processing apparatus Nov 17, 2020 Issued
Array ( [id] => 17799115 [patent_doc_number] => 11413383 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-08-16 [patent_title] => Low resistance microfabricated filter [patent_app_type] => utility [patent_app_number] => 17/092616 [patent_app_country] => US [patent_app_date] => 2020-11-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 19 [patent_figures_cnt] => 40 [patent_no_of_words] => 13563 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 170 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17092616 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/092616
Low resistance microfabricated filter Nov 8, 2020 Issued
Array ( [id] => 18091699 [patent_doc_number] => 20220410040 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-29 [patent_title] => APPARATUS FOR PURIFYING WATER AND CORRESPONDING PURIFICATION METHOD [patent_app_type] => utility [patent_app_number] => 17/777081 [patent_app_country] => US [patent_app_date] => 2020-11-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5077 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 218 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17777081 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/777081
APPARATUS FOR PURIFYING WATER AND CORRESPONDING PURIFICATION METHOD Nov 2, 2020 Abandoned
Array ( [id] => 18559716 [patent_doc_number] => 11724950 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-15 [patent_title] => System for industrial and hydrocarbon wastewater treatment [patent_app_type] => utility [patent_app_number] => 17/083820 [patent_app_country] => US [patent_app_date] => 2020-10-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 15 [patent_figures_cnt] => 16 [patent_no_of_words] => 8872 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 250 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17083820 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/083820
System for industrial and hydrocarbon wastewater treatment Oct 28, 2020 Issued
Array ( [id] => 17563025 [patent_doc_number] => 20220127174 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-04-28 [patent_title] => Wastewater Treatment Membrane Electro Membrane [patent_app_type] => utility [patent_app_number] => 17/081633 [patent_app_country] => US [patent_app_date] => 2020-10-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 626 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 65 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17081633 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/081633
Wastewater Treatment Membrane Electro Membrane Oct 26, 2020 Abandoned
Array ( [id] => 19241924 [patent_doc_number] => 12012343 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-06-18 [patent_title] => Destruction of PFAS in the presence of silica [patent_app_type] => utility [patent_app_number] => 17/080781 [patent_app_country] => US [patent_app_date] => 2020-10-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 5860 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 21 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17080781 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/080781
Destruction of PFAS in the presence of silica Oct 25, 2020 Issued
Array ( [id] => 19027192 [patent_doc_number] => 11926539 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-03-12 [patent_title] => Systems and methods for desalination of liquids [patent_app_type] => utility [patent_app_number] => 18/033552 [patent_app_country] => US [patent_app_date] => 2020-10-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 12929 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 156 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18033552 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/033552
Systems and methods for desalination of liquids Oct 24, 2020 Issued
Array ( [id] => 18035029 [patent_doc_number] => 20220379244 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-01 [patent_title] => SYSTEM FOR SIGNALING AND/OR DISPLAYING A DEPLETION CONDITION OF A FILTER CARTRIDGE [patent_app_type] => utility [patent_app_number] => 17/770492 [patent_app_country] => US [patent_app_date] => 2020-10-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2424 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 228 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17770492 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/770492
SYSTEM FOR SIGNALING AND/OR DISPLAYING A DEPLETION CONDITION OF A FILTER CARTRIDGE Oct 20, 2020 Pending
Array ( [id] => 16597866 [patent_doc_number] => 20210024397 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-01-28 [patent_title] => UNIT FOR TREATING A DRILLING MUD AND CORRESPONDING METHOD [patent_app_type] => utility [patent_app_number] => 17/070960 [patent_app_country] => US [patent_app_date] => 2020-10-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3882 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 122 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17070960 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/070960
Unit for treating a drilling mud and corresponding method Oct 14, 2020 Issued
Array ( [id] => 18059345 [patent_doc_number] => 20220390431 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-08 [patent_title] => DEVICE FOR BLOOD [patent_app_type] => utility [patent_app_number] => 17/770312 [patent_app_country] => US [patent_app_date] => 2020-10-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10555 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 41 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17770312 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/770312
DEVICE FOR BLOOD Oct 14, 2020 Abandoned
Menu