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] => 17777372 [patent_doc_number] => 20220243721 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-08-04 [patent_title] => FLOW RATE CONTROL FOR PUMP WITH FLOW SENSOR [patent_app_type] => utility [patent_app_number] => 17/162973 [patent_app_country] => US [patent_app_date] => 2021-01-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7198 [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] => 17162973 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/162973
Flow rate control for pump with flow sensor Jan 28, 2021 Issued
Array ( [id] => 18198240 [patent_doc_number] => 20230051759 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-02-16 [patent_title] => MULTI-PIPING SPIRAL-PUMP FOR TREATING FOOD ITEMS [patent_app_type] => utility [patent_app_number] => 17/796038 [patent_app_country] => US [patent_app_date] => 2021-01-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5294 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 128 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17796038 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/796038
MULTI-PIPING SPIRAL-PUMP FOR TREATING FOOD ITEMS Jan 27, 2021 Pending
Array ( [id] => 17968860 [patent_doc_number] => 11486378 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-11-01 [patent_title] => Electric compressor [patent_app_type] => utility [patent_app_number] => 17/157488 [patent_app_country] => US [patent_app_date] => 2021-01-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 5 [patent_no_of_words] => 4982 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 290 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17157488 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/157488
Electric compressor Jan 24, 2021 Issued
Array ( [id] => 17891276 [patent_doc_number] => 11454235 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-09-27 [patent_title] => Thermistor flow path [patent_app_type] => utility [patent_app_number] => 17/141265 [patent_app_country] => US [patent_app_date] => 2021-01-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 7 [patent_no_of_words] => 2622 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 227 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17141265 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/141265
Thermistor flow path Jan 4, 2021 Issued
Array ( [id] => 16933211 [patent_doc_number] => 20210199100 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-07-01 [patent_title] => AIR COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/138743 [patent_app_country] => US [patent_app_date] => 2020-12-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3025 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 163 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17138743 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/138743
Air compressor Dec 29, 2020 Issued
Array ( [id] => 16763052 [patent_doc_number] => 20210108633 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-04-15 [patent_title] => REFRIGERANT COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/131010 [patent_app_country] => US [patent_app_date] => 2020-12-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4526 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 109 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17131010 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/131010
REFRIGERANT COMPRESSOR Dec 21, 2020 Pending
Array ( [id] => 18247256 [patent_doc_number] => 11603833 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-03-14 [patent_title] => Air compressors for use with a vehicle [patent_app_type] => utility [patent_app_number] => 17/126597 [patent_app_country] => US [patent_app_date] => 2020-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 13 [patent_no_of_words] => 5904 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 197 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17126597 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/126597
Air compressors for use with a vehicle Dec 17, 2020 Issued
Array ( [id] => 16750531 [patent_doc_number] => 20210102540 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-04-08 [patent_title] => Package-Type Compressor [patent_app_type] => utility [patent_app_number] => 17/127473 [patent_app_country] => US [patent_app_date] => 2020-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5953 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 206 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17127473 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/127473
Package-type compressor Dec 17, 2020 Issued
Array ( [id] => 18891535 [patent_doc_number] => 11870315 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-01-09 [patent_title] => Electric pump [patent_app_type] => utility [patent_app_number] => 17/111754 [patent_app_country] => US [patent_app_date] => 2020-12-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 13 [patent_no_of_words] => 3279 [patent_no_of_claims] => 4 [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] => 17111754 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/111754
Electric pump Dec 3, 2020 Issued
Array ( [id] => 16712757 [patent_doc_number] => 20210079904 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-03-18 [patent_title] => COMPRESSED AIR SYSTEM FOR A MOTOR VEHICLE [patent_app_type] => utility [patent_app_number] => 17/107226 [patent_app_country] => US [patent_app_date] => 2020-11-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5588 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [patent_words_short_claim] => 329 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17107226 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/107226
COMPRESSED AIR SYSTEM FOR A MOTOR VEHICLE Nov 29, 2020 Abandoned
Array ( [id] => 16840344 [patent_doc_number] => 20210148356 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-05-20 [patent_title] => DOUBLE-ACTION PUMP CYLINDER [patent_app_type] => utility [patent_app_number] => 17/100079 [patent_app_country] => US [patent_app_date] => 2020-11-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4693 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [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] => 17100079 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/100079
DOUBLE-ACTION PUMP CYLINDER Nov 19, 2020 Abandoned
Array ( [id] => 18141243 [patent_doc_number] => 20230015085 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-01-19 [patent_title] => HERMETICALLY ENCAPSULATED REFRIGERANT COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/757608 [patent_app_country] => US [patent_app_date] => 2020-11-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2901 [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] => 17757608 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/757608
HERMETICALLY ENCAPSULATED REFRIGERANT COMPRESSOR Nov 11, 2020 Abandoned
Array ( [id] => 18165091 [patent_doc_number] => 20230031688 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-02-02 [patent_title] => HERMETICALLY ENCAPSULATED REFRIGERANT COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/757577 [patent_app_country] => US [patent_app_date] => 2020-11-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3621 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [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] => 17757577 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/757577
HERMETICALLY ENCAPSULATED REFRIGERANT COMPRESSOR Nov 11, 2020 Abandoned
Array ( [id] => 18058837 [patent_doc_number] => 20220389923 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-08 [patent_title] => PERISTALTIC PUMP WITH ONE-PIECE PUMP BODY AND FACILITATED ASSEMBLY [patent_app_type] => utility [patent_app_number] => 17/775194 [patent_app_country] => US [patent_app_date] => 2020-11-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3163 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 73 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17775194 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/775194
PERISTALTIC PUMP WITH ONE-PIECE PUMP BODY AND FACILITATED ASSEMBLY Nov 5, 2020 Abandoned
Array ( [id] => 19257805 [patent_doc_number] => 12017844 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-06-25 [patent_title] => System for controlling the supply of water to a rooftop water tank [patent_app_type] => utility [patent_app_number] => 17/089904 [patent_app_country] => US [patent_app_date] => 2020-11-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 9439 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 361 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17089904 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/089904
System for controlling the supply of water to a rooftop water tank Nov 4, 2020 Issued
Array ( [id] => 18637094 [patent_doc_number] => 11761683 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-09-19 [patent_title] => Linear compressor [patent_app_type] => utility [patent_app_number] => 17/072684 [patent_app_country] => US [patent_app_date] => 2020-10-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 10 [patent_figures_cnt] => 10 [patent_no_of_words] => 6901 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 139 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17072684 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/072684
Linear compressor Oct 15, 2020 Issued
Array ( [id] => 17534299 [patent_doc_number] => 20220112908 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-04-14 [patent_title] => SYSTEMS AND APPARATUSES FOR PORTABLE AIR DISTRIBUTION [patent_app_type] => utility [patent_app_number] => 17/069451 [patent_app_country] => US [patent_app_date] => 2020-10-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6912 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 17069451 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/069451
SYSTEMS AND APPARATUSES FOR PORTABLE AIR DISTRIBUTION Oct 12, 2020 Pending
Array ( [id] => 19368800 [patent_doc_number] => 12060877 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-08-13 [patent_title] => Hydraulic fracturing pump control system [patent_app_type] => utility [patent_app_number] => 17/025716 [patent_app_country] => US [patent_app_date] => 2020-09-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 12121 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 205 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17025716 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/025716
Hydraulic fracturing pump control system Sep 17, 2020 Issued
Array ( [id] => 18771572 [patent_doc_number] => 20230366393 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-11-16 [patent_title] => BENT AXIS PLUNGER-TYPE VARIABLE HYDRAULIC MOTOR PUMP [patent_app_type] => utility [patent_app_number] => 18/245580 [patent_app_country] => US [patent_app_date] => 2020-09-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7717 [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] => 18245580 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/245580
Bent axis plunger-type variable hydraulic motor pump Sep 15, 2020 Issued
Array ( [id] => 17933168 [patent_doc_number] => 20220328294 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-10-13 [patent_title] => REDUCING PLASMA FORMATION IN AN ION PUMP [patent_app_type] => utility [patent_app_number] => 17/640673 [patent_app_country] => US [patent_app_date] => 2020-09-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3641 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [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] => 17640673 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/640673
Reducing plasma formation in an ion pump Sep 3, 2020 Issued
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