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] => 18323079 [patent_doc_number] => 20230121207 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-04-20 [patent_title] => HERMETIC ELECTRIC COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/907041 [patent_app_country] => US [patent_app_date] => 2021-06-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4150 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 214 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17907041 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/907041
Hermetic electric compressor Jun 17, 2021 Issued
Array ( [id] => 18709966 [patent_doc_number] => 20230332588 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-10-19 [patent_title] => LINEAR COMPRESSOR [patent_app_type] => utility [patent_app_number] => 18/011431 [patent_app_country] => US [patent_app_date] => 2021-06-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 19102 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 136 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18011431 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/011431
Linear compressor Jun 14, 2021 Issued
Array ( [id] => 20256694 [patent_doc_number] => 12429038 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-09-30 [patent_title] => Linear compressor [patent_app_type] => utility [patent_app_number] => 18/012030 [patent_app_country] => US [patent_app_date] => 2021-06-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 20 [patent_figures_cnt] => 23 [patent_no_of_words] => 14716 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 189 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18012030 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/012030
Linear compressor Jun 13, 2021 Issued
Array ( [id] => 17429188 [patent_doc_number] => 20220056897 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-02-24 [patent_title] => HERMETIC COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/335332 [patent_app_country] => US [patent_app_date] => 2021-06-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 12717 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 129 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17335332 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/335332
Hermetic compressor May 31, 2021 Issued
Array ( [id] => 17244238 [patent_doc_number] => 20210363981 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-11-25 [patent_title] => Noise Reduction Device of Air Compressor [patent_app_type] => utility [patent_app_number] => 17/325216 [patent_app_country] => US [patent_app_date] => 2021-05-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2127 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 314 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17325216 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/325216
Noise Reduction Device of Air Compressor May 19, 2021 Abandoned
Array ( [id] => 18748960 [patent_doc_number] => 11808262 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-07 [patent_title] => Linear compressor [patent_app_type] => utility [patent_app_number] => 17/324219 [patent_app_country] => US [patent_app_date] => 2021-05-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 25 [patent_no_of_words] => 14119 [patent_no_of_claims] => 1 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 218 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17324219 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/324219
Linear compressor May 18, 2021 Issued
Array ( [id] => 17053022 [patent_doc_number] => 20210262456 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-26 [patent_title] => MECHANICALLY DRIVEN MODULAR DIAPHRAGM PUMP [patent_app_type] => utility [patent_app_number] => 17/314736 [patent_app_country] => US [patent_app_date] => 2021-05-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7860 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 336 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17314736 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/314736
Mechanically driven modular diaphragm pump May 6, 2021 Issued
Array ( [id] => 18583585 [patent_doc_number] => 20230265846 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-08-24 [patent_title] => STATE DETECTION ON ECCENTRIC SCREW PUMPS [patent_app_type] => utility [patent_app_number] => 17/921483 [patent_app_country] => US [patent_app_date] => 2021-04-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 12906 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [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] => 17921483 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/921483
STATE DETECTION ON ECCENTRIC SCREW PUMPS Apr 26, 2021 Pending
Array ( [id] => 18748955 [patent_doc_number] => 11808257 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-07 [patent_title] => Cordless compressor [patent_app_type] => utility [patent_app_number] => 17/231148 [patent_app_country] => US [patent_app_date] => 2021-04-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 3201 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 148 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17231148 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/231148
Cordless compressor Apr 14, 2021 Issued
Array ( [id] => 16992704 [patent_doc_number] => 20210231124 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-07-29 [patent_title] => BRACKETLESS MAGNETIC PUMP [patent_app_type] => utility [patent_app_number] => 17/227864 [patent_app_country] => US [patent_app_date] => 2021-04-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5536 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 84 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17227864 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/227864
Bracketless magnetic pump Apr 11, 2021 Issued
Array ( [id] => 16963649 [patent_doc_number] => 20210215148 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-07-15 [patent_title] => METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS [patent_app_type] => utility [patent_app_number] => 17/217921 [patent_app_country] => US [patent_app_date] => 2021-03-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2747 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -3 [patent_words_short_claim] => 309 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17217921 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/217921
METHOD AND EQUIPMENT FOR IMPROVING THE EFFICIENCY OF COMPRESSORS AND REFRIGERATORS Mar 29, 2021 Abandoned
Array ( [id] => 18576186 [patent_doc_number] => 11732704 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-22 [patent_title] => Air compressor [patent_app_type] => utility [patent_app_number] => 17/208003 [patent_app_country] => US [patent_app_date] => 2021-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 32 [patent_figures_cnt] => 43 [patent_no_of_words] => 31555 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 317 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17208003 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/208003
Air compressor Mar 21, 2021 Issued
Array ( [id] => 18576186 [patent_doc_number] => 11732704 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-22 [patent_title] => Air compressor [patent_app_type] => utility [patent_app_number] => 17/208003 [patent_app_country] => US [patent_app_date] => 2021-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 32 [patent_figures_cnt] => 43 [patent_no_of_words] => 31555 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 317 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17208003 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/208003
Air compressor Mar 21, 2021 Issued
Array ( [id] => 18576186 [patent_doc_number] => 11732704 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-22 [patent_title] => Air compressor [patent_app_type] => utility [patent_app_number] => 17/208003 [patent_app_country] => US [patent_app_date] => 2021-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 32 [patent_figures_cnt] => 43 [patent_no_of_words] => 31555 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 317 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17208003 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/208003
Air compressor Mar 21, 2021 Issued
Array ( [id] => 18576186 [patent_doc_number] => 11732704 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-08-22 [patent_title] => Air compressor [patent_app_type] => utility [patent_app_number] => 17/208003 [patent_app_country] => US [patent_app_date] => 2021-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 32 [patent_figures_cnt] => 43 [patent_no_of_words] => 31555 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 317 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17208003 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/208003
Air compressor Mar 21, 2021 Issued
Array ( [id] => 16947662 [patent_doc_number] => 20210206353 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-07-08 [patent_title] => INFLATOR WITH DYNAMIC PRESSURE COMPENSATION [patent_app_type] => utility [patent_app_number] => 17/207018 [patent_app_country] => US [patent_app_date] => 2021-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9704 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 17207018 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/207018
INFLATOR WITH DYNAMIC PRESSURE COMPENSATION Mar 18, 2021 Abandoned
Array ( [id] => 16916975 [patent_doc_number] => 20210190067 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-06-24 [patent_title] => Fluid End [patent_app_type] => utility [patent_app_number] => 17/194461 [patent_app_country] => US [patent_app_date] => 2021-03-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 53545 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 102 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17194461 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/194461
Fluid end Mar 7, 2021 Issued
Array ( [id] => 16916957 [patent_doc_number] => 20210190049 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-06-24 [patent_title] => HIGH PRESSURE PUMP [patent_app_type] => utility [patent_app_number] => 17/191023 [patent_app_country] => US [patent_app_date] => 2021-03-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6369 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 180 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17191023 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/191023
HIGH PRESSURE PUMP Mar 2, 2021 Abandoned
Array ( [id] => 17068044 [patent_doc_number] => 20210270259 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-09-02 [patent_title] => FLUID SENSING SAFETY [patent_app_type] => utility [patent_app_number] => 17/189651 [patent_app_country] => US [patent_app_date] => 2021-03-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8113 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 38 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17189651 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/189651
Fluid sensing safety Mar 1, 2021 Issued
Array ( [id] => 17300277 [patent_doc_number] => 20210396116 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-12-23 [patent_title] => SYSTEMS AND METHODS TO AUTONOMOUSLY OPERATE HYDRAULIC FRACTURING UNITS [patent_app_type] => utility [patent_app_number] => 17/173320 [patent_app_country] => US [patent_app_date] => 2021-02-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14831 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -21 [patent_words_short_claim] => 225 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17173320 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/173320
Systems and methods to autonomously operate hydraulic fracturing units Feb 10, 2021 Issued
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