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] => 17007944 [patent_doc_number] => 20210239105 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-05 [patent_title] => DAMPED MOBILE COMPRESSOR [patent_app_type] => utility [patent_app_number] => 17/049731 [patent_app_country] => US [patent_app_date] => 2019-04-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 11148 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -30 [patent_words_short_claim] => 50 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17049731 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/049731
Damped mobile compressor Apr 18, 2019 Issued
Array ( [id] => 19227294 [patent_doc_number] => 12006928 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-06-11 [patent_title] => Inflator with motor fixing ring [patent_app_type] => utility [patent_app_number] => 15/733573 [patent_app_country] => US [patent_app_date] => 2019-04-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 1990 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 127 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15733573 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/733573
Inflator with motor fixing ring Apr 16, 2019 Issued
Array ( [id] => 14654571 [patent_doc_number] => 20190234414 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-08-01 [patent_title] => METHOD FOR COMPRESSING AN INCOMING FEED AIR STREAM IN A CRYOGENIC AIR SEPARATION PLANT [patent_app_type] => utility [patent_app_number] => 16/381063 [patent_app_country] => US [patent_app_date] => 2019-04-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14626 [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] => 16381063 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/381063
Method for compressing an incoming feed air stream in a cryogenic air separation plant Apr 10, 2019 Issued
Array ( [id] => 14654573 [patent_doc_number] => 20190234415 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-08-01 [patent_title] => METHOD FOR COMPRESSING AN INCOMING FEED AIR STREAM IN A CRYOGENIC AIR SEPARATION PLANT [patent_app_type] => utility [patent_app_number] => 16/381078 [patent_app_country] => US [patent_app_date] => 2019-04-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14626 [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] => 16381078 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/381078
Method for compressing an incoming feed air stream in a cryogenic air separation plant Apr 10, 2019 Issued
Array ( [id] => 15384781 [patent_doc_number] => 10533564 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-01-14 [patent_title] => Method for compressing an incoming feed air stream in a cryogenic air separation plant [patent_app_type] => utility [patent_app_number] => 16/381046 [patent_app_country] => US [patent_app_date] => 2019-04-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 13 [patent_no_of_words] => 14629 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 634 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16381046 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/381046
Method for compressing an incoming feed air stream in a cryogenic air separation plant Apr 10, 2019 Issued
Array ( [id] => 16763046 [patent_doc_number] => 20210108627 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-04-15 [patent_title] => HERMETIC COMPRESSOR HAVING DISCHARGE MUFFLER [patent_app_type] => utility [patent_app_number] => 17/041273 [patent_app_country] => US [patent_app_date] => 2019-03-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2817 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [patent_words_short_claim] => 159 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17041273 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/041273
Hermetic compressor having discharge muffler Mar 26, 2019 Issued
Array ( [id] => 16598850 [patent_doc_number] => 20210025381 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-01-28 [patent_title] => METHOD AND SYSTEM FOR CONTROLLING DOWNHOLE PUMPING SYSTEMS [patent_app_type] => utility [patent_app_number] => 16/982617 [patent_app_country] => US [patent_app_date] => 2019-03-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 18069 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -56 [patent_words_short_claim] => 80 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16982617 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/982617
Method and system for controlling downhole pumping systems Mar 20, 2019 Issued
Array ( [id] => 18825753 [patent_doc_number] => 11841025 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-12-12 [patent_title] => Method for analyzing, monitoring, optimizing and/or comparing energy efficiency in a multiple compressor system [patent_app_type] => utility [patent_app_number] => 16/982534 [patent_app_country] => US [patent_app_date] => 2019-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 13 [patent_no_of_words] => 12022 [patent_no_of_claims] => 12 [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] => 16982534 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/982534
Method for analyzing, monitoring, optimizing and/or comparing energy efficiency in a multiple compressor system Mar 18, 2019 Issued
Array ( [id] => 17816068 [patent_doc_number] => 11421671 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-08-23 [patent_title] => Compressor [patent_app_type] => utility [patent_app_number] => 16/358022 [patent_app_country] => US [patent_app_date] => 2019-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 14 [patent_no_of_words] => 8439 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 234 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16358022 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/358022
Compressor Mar 18, 2019 Issued
Array ( [id] => 17612428 [patent_doc_number] => 20220154707 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-05-19 [patent_title] => ELECTRIC VACUUM PUMP FOR BRAKING SYSTEM ON PASSENGER CARS WITH V-TWIN PISTON ARRANGEMENT [patent_app_type] => utility [patent_app_number] => 17/439415 [patent_app_country] => US [patent_app_date] => 2019-03-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6505 [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] => 17439415 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/439415
ELECTRIC VACUUM PUMP FOR BRAKING SYSTEM ON PASSENGER CARS WITH V-TWIN PISTON ARRANGEMENT Mar 14, 2019 Abandoned
Array ( [id] => 17259417 [patent_doc_number] => 20210372402 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-12-02 [patent_title] => A LIQUID RING PUMP MANIFOLD [patent_app_type] => utility [patent_app_number] => 16/979996 [patent_app_country] => US [patent_app_date] => 2019-03-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7183 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 59 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16979996 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/979996
A LIQUID RING PUMP MANIFOLD Mar 13, 2019 Abandoned
Array ( [id] => 16092371 [patent_doc_number] => 20200200172 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-06-25 [patent_title] => LIQUID-RING VACUUM PUMP HAVING INTERNAL INSPECTION AND FOREIGN MATTER REMOVAL FUNCTIONS [patent_app_type] => utility [patent_app_number] => 16/291166 [patent_app_country] => US [patent_app_date] => 2019-03-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2959 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [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] => 16291166 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/291166
Liquid-ring vacuum pump having internal inspection and foreign matter removal functions Mar 3, 2019 Issued
Array ( [id] => 16674034 [patent_doc_number] => 20210062797 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-03-04 [patent_title] => SYSTEM COMPRISING A REFRIGERANT COMPRESSOR AND METHOD FOR OPERATING THE REFRIGERANT COMPRESSOR [patent_app_type] => utility [patent_app_number] => 16/977146 [patent_app_country] => US [patent_app_date] => 2019-02-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10143 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [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] => 16977146 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/977146
SYSTEM COMPRISING A REFRIGERANT COMPRESSOR AND METHOD FOR OPERATING THE REFRIGERANT COMPRESSOR Feb 20, 2019 Abandoned
Array ( [id] => 14995231 [patent_doc_number] => 20190316573 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-10-17 [patent_title] => PUMP [patent_app_type] => utility [patent_app_number] => 16/277623 [patent_app_country] => US [patent_app_date] => 2019-02-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 16680 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -23 [patent_words_short_claim] => 372 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16277623 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/277623
Pump Feb 14, 2019 Issued
Array ( [id] => 16415287 [patent_doc_number] => 10823167 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-11-03 [patent_title] => Pump assembly [patent_app_type] => utility [patent_app_number] => 16/263203 [patent_app_country] => US [patent_app_date] => 2019-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 14 [patent_no_of_words] => 2236 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 215 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16263203 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/263203
Pump assembly Jan 30, 2019 Issued
Array ( [id] => 19932433 [patent_doc_number] => 12305632 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-05-20 [patent_title] => Pump systems and methods to improve pump load predictions [patent_app_type] => utility [patent_app_number] => 16/763432 [patent_app_country] => US [patent_app_date] => 2019-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 1087 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 252 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16763432 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/763432
Pump systems and methods to improve pump load predictions Jan 30, 2019 Issued
Array ( [id] => 16519945 [patent_doc_number] => 10871156 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-12-22 [patent_title] => Valve and gas control device [patent_app_type] => utility [patent_app_number] => 16/260303 [patent_app_country] => US [patent_app_date] => 2019-01-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 17 [patent_figures_cnt] => 20 [patent_no_of_words] => 12050 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 233 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16260303 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/260303
Valve and gas control device Jan 28, 2019 Issued
Array ( [id] => 16614432 [patent_doc_number] => 20210033085 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-02-04 [patent_title] => DEVICE AND METHOD FOR COMPRESSING A WORKING MEDIUM [patent_app_type] => utility [patent_app_number] => 16/964172 [patent_app_country] => US [patent_app_date] => 2019-01-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2826 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [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] => 16964172 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/964172
Device and method for compressing a working medium Jan 22, 2019 Issued
Array ( [id] => 18369656 [patent_doc_number] => 11649817 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-05-16 [patent_title] => Operating multiple fracturing pumps to deliver a smooth total flow rate transition [patent_app_type] => utility [patent_app_number] => 16/963363 [patent_app_country] => US [patent_app_date] => 2019-01-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 11 [patent_no_of_words] => 11940 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 226 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16963363 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/963363
Operating multiple fracturing pumps to deliver a smooth total flow rate transition Jan 22, 2019 Issued
Array ( [id] => 17400420 [patent_doc_number] => 20220042510 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-02-10 [patent_title] => Screw compressor slide valve and screw compressor with gas pulsation attenuation function [patent_app_type] => utility [patent_app_number] => 17/277288 [patent_app_country] => US [patent_app_date] => 2018-12-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4228 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 123 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17277288 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/277288
Screw compressor slide valve and screw compressor with gas pulsation attenuation function Dec 25, 2018 Issued
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