Search

Keith D. Walker

Supervisory Patent Examiner (ID: 7518, Phone: (571)272-3458 , Office: P/1735 )

Most Active Art Unit
1735
Art Unit(s)
1726, 1745, 1795, 1735
Total Applications
565
Issued Applications
152
Pending Applications
54
Abandoned Applications
362

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 16541802 [patent_doc_number] => 20200408215 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-12-31 [patent_title] => FLUID PUMPING SYSTEM WITH A CONTINUOUSLY VARIABLE TRANSMISSION [patent_app_type] => utility [patent_app_number] => 17/010540 [patent_app_country] => US [patent_app_date] => 2020-09-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 18407 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17010540 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/010540
FLUID PUMPING SYSTEM WITH A CONTINUOUSLY VARIABLE TRANSMISSION Sep 1, 2020 Abandoned
Array ( [id] => 18709979 [patent_doc_number] => 20230332601 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-10-19 [patent_title] => CONTROL OF OPERATING LIQUID FLOW INTO A LIQUID RING PUMP [patent_app_type] => utility [patent_app_number] => 18/042696 [patent_app_country] => US [patent_app_date] => 2020-08-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7498 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 277 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18042696 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/042696
Control of operating liquid flow into a liquid ring pump Aug 27, 2020 Issued
Array ( [id] => 19676623 [patent_doc_number] => 12188475 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-07 [patent_title] => Centrifugal pump and a pump housing [patent_app_type] => utility [patent_app_number] => 17/000458 [patent_app_country] => US [patent_app_date] => 2020-08-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 10 [patent_no_of_words] => 9074 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 198 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17000458 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/000458
Centrifugal pump and a pump housing Aug 23, 2020 Issued
Array ( [id] => 17838498 [patent_doc_number] => 20220275803 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-09-01 [patent_title] => PUMP [patent_app_type] => utility [patent_app_number] => 17/636939 [patent_app_country] => US [patent_app_date] => 2020-08-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4317 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 138 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17636939 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/636939
Pump Aug 18, 2020 Issued
Array ( [id] => 17939135 [patent_doc_number] => 11473580 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-10-18 [patent_title] => Electric compressor [patent_app_type] => utility [patent_app_number] => 16/997267 [patent_app_country] => US [patent_app_date] => 2020-08-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 9691 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 520 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16997267 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/997267
Electric compressor Aug 18, 2020 Issued
Array ( [id] => 19109098 [patent_doc_number] => 11962216 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-04-16 [patent_title] => Annular electromagnetic induction pump [patent_app_type] => utility [patent_app_number] => 17/641076 [patent_app_country] => US [patent_app_date] => 2020-08-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 5332 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 259 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17641076 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/641076
Annular electromagnetic induction pump Aug 12, 2020 Issued
Array ( [id] => 16614431 [patent_doc_number] => 20210033084 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-02-04 [patent_title] => CYLINDER PISTON FOR AN AIR COMPRESSOR [patent_app_type] => utility [patent_app_number] => 16/943324 [patent_app_country] => US [patent_app_date] => 2020-07-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5861 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 106 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16943324 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/943324
Cylinder piston for an air compressor Jul 29, 2020 Issued
Array ( [id] => 16437851 [patent_doc_number] => 20200355177 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-11-12 [patent_title] => PRESSURE ADJUSTMENT APPARATUS AND METHOD [patent_app_type] => utility [patent_app_number] => 16/939209 [patent_app_country] => US [patent_app_date] => 2020-07-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5881 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 146 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16939209 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/939209
Pressure adjustment apparatus and method Jul 26, 2020 Issued
Array ( [id] => 17960846 [patent_doc_number] => 20220341426 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-10-27 [patent_title] => HEAT RECOVERY DEVICE [patent_app_type] => utility [patent_app_number] => 17/639005 [patent_app_country] => US [patent_app_date] => 2020-07-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5754 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 133 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17639005 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/639005
Heat recovery device Jul 19, 2020 Issued
Array ( [id] => 18685815 [patent_doc_number] => 11781540 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-10-10 [patent_title] => Linear compressor [patent_app_type] => utility [patent_app_number] => 16/929548 [patent_app_country] => US [patent_app_date] => 2020-07-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 13 [patent_no_of_words] => 16067 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 135 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16929548 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/929548
Linear compressor Jul 14, 2020 Issued
Array ( [id] => 17852692 [patent_doc_number] => 20220282734 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-09-08 [patent_title] => DIVERSIFIED AND REMOVABLE PUMP SYSTEMS AND METHODS FOR INFLATING AND DEFLATING INFLATABLE OBJECTS [patent_app_type] => utility [patent_app_number] => 17/625060 [patent_app_country] => US [patent_app_date] => 2020-07-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14689 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -40 [patent_words_short_claim] => 105 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17625060 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/625060
DIVERSIFIED AND REMOVABLE PUMP SYSTEMS AND METHODS FOR INFLATING AND DEFLATING INFLATABLE OBJECTS Jul 5, 2020 Pending
Array ( [id] => 17990841 [patent_doc_number] => 20220356878 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-11-10 [patent_title] => Reversible Reciprocating Pump [patent_app_type] => utility [patent_app_number] => 17/623480 [patent_app_country] => US [patent_app_date] => 2020-06-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 922 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 79 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17623480 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/623480
Reversible Reciprocating Pump Jun 25, 2020 Abandoned
Array ( [id] => 16583569 [patent_doc_number] => 20210017971 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-01-21 [patent_title] => MULTI-CYLINDER FRIGORIFIC COMPRESSOR WITH EXTERNAL DELIVERY MANIFOLD [patent_app_type] => utility [patent_app_number] => 16/907256 [patent_app_country] => US [patent_app_date] => 2020-06-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1826 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -1 [patent_words_short_claim] => 18 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16907256 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/907256
MULTI-CYLINDER FRIGORIFIC COMPRESSOR WITH EXTERNAL DELIVERY MANIFOLD Jun 20, 2020 Abandoned
Array ( [id] => 16362020 [patent_doc_number] => 20200318771 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-10-08 [patent_title] => FLUID APPARATUS AND BUFFER TANK FOR USE THEREIN [patent_app_type] => utility [patent_app_number] => 16/904085 [patent_app_country] => US [patent_app_date] => 2020-06-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4641 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 111 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16904085 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/904085
FLUID APPARATUS AND BUFFER TANK FOR USE THEREIN Jun 16, 2020 Abandoned
Array ( [id] => 19702178 [patent_doc_number] => 12196195 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-14 [patent_title] => Demand based hydraulic pump control system [patent_app_type] => utility [patent_app_number] => 16/899785 [patent_app_country] => US [patent_app_date] => 2020-06-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 3977 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 125 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16899785 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/899785
Demand based hydraulic pump control system Jun 11, 2020 Issued
Array ( [id] => 16757329 [patent_doc_number] => 10975870 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-04-13 [patent_title] => Bracketless magnetic pump [patent_app_type] => utility [patent_app_number] => 16/883393 [patent_app_country] => US [patent_app_date] => 2020-05-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 5518 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 211 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16883393 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/883393
Bracketless magnetic pump May 25, 2020 Issued
Array ( [id] => 17750392 [patent_doc_number] => 20220228597 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-07-21 [patent_title] => VACUUM PUMP FOR USE DURING MAINTENANCE OR COMMISSIONING OF AN HVAC-R SYSTEM, ADAPTER FOR A VACUUM PUMP, AND A METHOD OF PERFORMING A VACUUM TEST ON AN HVAC-R SYSTEM [patent_app_type] => utility [patent_app_number] => 17/614782 [patent_app_country] => US [patent_app_date] => 2020-05-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9200 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [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] => 17614782 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/614782
VACUUM PUMP FOR USE DURING MAINTENANCE OR COMMISSIONING OF AN HVAC-R SYSTEM, ADAPTER FOR A VACUUM PUMP, AND A METHOD OF PERFORMING A VACUUM TEST ON AN HVAC-R SYSTEM May 19, 2020 Abandoned
Array ( [id] => 17750464 [patent_doc_number] => 20220228669 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-07-21 [patent_title] => Pump for A System for Applying A Coating Product, and Use of Such A Pump [patent_app_type] => utility [patent_app_number] => 17/605210 [patent_app_country] => US [patent_app_date] => 2020-05-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2816 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [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] => 17605210 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/605210
Pump for A System for Applying A Coating Product, and Use of Such A Pump May 14, 2020 Abandoned
Array ( [id] => 18492652 [patent_doc_number] => 11698063 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-07-11 [patent_title] => Hydraulic end assembly structure of a plunger pump [patent_app_type] => utility [patent_app_number] => 16/874816 [patent_app_country] => US [patent_app_date] => 2020-05-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 1998 [patent_no_of_claims] => 4 [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] => 16874816 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/874816
Hydraulic end assembly structure of a plunger pump May 14, 2020 Issued
Array ( [id] => 17053026 [patent_doc_number] => 20210262460 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-26 [patent_title] => INFLATABLE PUMP [patent_app_type] => utility [patent_app_number] => 16/865382 [patent_app_country] => US [patent_app_date] => 2020-05-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3308 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [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] => 16865382 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/865382
Inflatable pump May 2, 2020 Issued
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