Search

David J. Walczak

Examiner (ID: 16217, Phone: (571)272-4895 , Office: P/3754 )

Most Active Art Unit
3754
Art Unit(s)
2403, 3751, 2899, 3105, 3754, 2832
Total Applications
4701
Issued Applications
3668
Pending Applications
254
Abandoned Applications
823

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 18217027 [patent_doc_number] => 11591953 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-02-28 [patent_title] => Method for controlling hydrogen combustion in a hydrogen internal combusting engine [patent_app_type] => utility [patent_app_number] => 17/810742 [patent_app_country] => US [patent_app_date] => 2022-07-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 2070 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 140 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17810742 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/810742
Method for controlling hydrogen combustion in a hydrogen internal combusting engine Jul 4, 2022 Issued
Array ( [id] => 18124524 [patent_doc_number] => 20230010136 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-01-12 [patent_title] => SYSTEM FOR CONTROLLING HYDROGEN COMBUSTION IN A HYDROGEN INTERNAL COMBUSTION ENGINE [patent_app_type] => utility [patent_app_number] => 17/810739 [patent_app_country] => US [patent_app_date] => 2022-07-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2684 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 62 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17810739 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/810739
SYSTEM FOR CONTROLLING HYDROGEN COMBUSTION IN A HYDROGEN INTERNAL COMBUSTION ENGINE Jul 4, 2022 Abandoned
Array ( [id] => 17946542 [patent_doc_number] => 20220333561 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-10-20 [patent_title] => SYSTEMS AND METHODS FOR REDUCTION OF EMISSIONS AND IMPROVING THE EFFICIENCY OF DIESEL INTERNAL COMBUSTION ENGINES [patent_app_type] => utility [patent_app_number] => 17/857913 [patent_app_country] => US [patent_app_date] => 2022-07-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 11833 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 63 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17857913 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/857913
Systems and methods for reduction of emissions and improving the efficiency of diesel internal combustion engines Jul 4, 2022 Issued
Array ( [id] => 19381746 [patent_doc_number] => 20240271616 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-08-15 [patent_title] => AIR COMPRESSOR CYLINDER LINER [patent_app_type] => utility [patent_app_number] => 18/567489 [patent_app_country] => US [patent_app_date] => 2022-06-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8516 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -26 [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] => 18567489 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/567489
Air compressor cylinder liner Jun 28, 2022 Issued
Array ( [id] => 18801981 [patent_doc_number] => 11835135 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2023-12-05 [patent_title] => Piston assembly with wrist pin cap [patent_app_type] => utility [patent_app_number] => 17/851840 [patent_app_country] => US [patent_app_date] => 2022-06-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 11 [patent_no_of_words] => 3290 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 95 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17851840 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/851840
Piston assembly with wrist pin cap Jun 27, 2022 Issued
Array ( [id] => 19702622 [patent_doc_number] => 12196640 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-14 [patent_title] => System and method for diagnosing an exhaust gas sensor [patent_app_type] => utility [patent_app_number] => 17/809233 [patent_app_country] => US [patent_app_date] => 2022-06-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 16 [patent_no_of_words] => 9877 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 79 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17809233 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/809233
System and method for diagnosing an exhaust gas sensor Jun 26, 2022 Issued
Array ( [id] => 19165318 [patent_doc_number] => 11981201 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-05-14 [patent_title] => Accessory rotary drive system and method [patent_app_type] => utility [patent_app_number] => 17/843813 [patent_app_country] => US [patent_app_date] => 2022-06-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 21 [patent_no_of_words] => 11297 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 167 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17843813 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/843813
Accessory rotary drive system and method Jun 16, 2022 Issued
Array ( [id] => 18764656 [patent_doc_number] => 11815045 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-14 [patent_title] => Cylinder liner for an internal combustion engine [patent_app_type] => utility [patent_app_number] => 17/838672 [patent_app_country] => US [patent_app_date] => 2022-06-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 2 [patent_no_of_words] => 4287 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 166 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17838672 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/838672
Cylinder liner for an internal combustion engine Jun 12, 2022 Issued
Array ( [id] => 18281432 [patent_doc_number] => 20230096904 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-30 [patent_title] => Two-Cylinder Reciprocating Engine [patent_app_type] => utility [patent_app_number] => 17/826802 [patent_app_country] => US [patent_app_date] => 2022-05-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2376 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -3 [patent_words_short_claim] => 137 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17826802 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/826802
Two-cylinder reciprocating engine May 26, 2022 Issued
Array ( [id] => 19333197 [patent_doc_number] => 20240247627 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-07-25 [patent_title] => FUEL PRESSURE ACCUMULATING DEVICE [patent_app_type] => utility [patent_app_number] => 18/561265 [patent_app_country] => US [patent_app_date] => 2022-05-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3908 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 114 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18561265 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/561265
FUEL PRESSURE ACCUMULATING DEVICE May 25, 2022 Pending
Array ( [id] => 18021410 [patent_doc_number] => 20220372909 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-11-24 [patent_title] => SYSTEMS AND METHODS FOR A HYDROGEN ZERO EMISSIONS VEHICLE [patent_app_type] => utility [patent_app_number] => 17/664066 [patent_app_country] => US [patent_app_date] => 2022-05-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2039 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 96 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17664066 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/664066
Systems and methods for a hydrogen zero emissions vehicle May 18, 2022 Issued
Array ( [id] => 19962186 [patent_doc_number] => 12331675 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-06-17 [patent_title] => Opposed-piston engine [patent_app_type] => utility [patent_app_number] => 18/278748 [patent_app_country] => US [patent_app_date] => 2022-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 7 [patent_no_of_words] => 2247 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 307 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18278748 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/278748
Opposed-piston engine Mar 21, 2022 Issued
Array ( [id] => 17887382 [patent_doc_number] => 20220302860 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-09-22 [patent_title] => SYSTEMS AND METHODS FOR GENSET COOLANT CONTROL [patent_app_type] => utility [patent_app_number] => 17/692658 [patent_app_country] => US [patent_app_date] => 2022-03-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 14407 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 150 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17692658 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/692658
Systems and methods for genset coolant control Mar 10, 2022 Issued
Array ( [id] => 18916321 [patent_doc_number] => 11878589 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-01-23 [patent_title] => Hybrid all-terrain vehicle [patent_app_type] => utility [patent_app_number] => 17/692690 [patent_app_country] => US [patent_app_date] => 2022-03-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 2063 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17692690 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/692690
Hybrid all-terrain vehicle Mar 10, 2022 Issued
Array ( [id] => 18477979 [patent_doc_number] => 11691707 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2023-07-04 [patent_title] => Cooling system for a power generation system on a marine vessel [patent_app_type] => utility [patent_app_number] => 17/686613 [patent_app_country] => US [patent_app_date] => 2022-03-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 9177 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [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] => 17686613 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/686613
Cooling system for a power generation system on a marine vessel Mar 3, 2022 Issued
Array ( [id] => 18505207 [patent_doc_number] => 11703013 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2023-07-18 [patent_title] => Engine head gasket having anti-preignition wrap and method of making same [patent_app_type] => utility [patent_app_number] => 17/685711 [patent_app_country] => US [patent_app_date] => 2022-03-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 2804 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 181 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17685711 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/685711
Engine head gasket having anti-preignition wrap and method of making same Mar 2, 2022 Issued
Array ( [id] => 18597940 [patent_doc_number] => 20230272739 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-08-31 [patent_title] => ORBITAL-EPICYCLE CRANKSHAFT WITH A REVERSIBLE AND ADJUSTABLE CONSTANT VOLUME COMBUSTION CYCLE AT TDC OR BDC [patent_app_type] => utility [patent_app_number] => 17/681712 [patent_app_country] => US [patent_app_date] => 2022-02-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7107 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 60 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17681712 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/681712
ORBITAL-EPICYCLE CRANKSHAFT WITH A REVERSIBLE AND ADJUSTABLE CONSTANT VOLUME COMBUSTION CYCLE AT TDC OR BDC Feb 25, 2022 Abandoned
Array ( [id] => 19158480 [patent_doc_number] => 20240151187 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-05-09 [patent_title] => Control Device for Variable Compression Ratio Mechanism, and Diagnostic Method for Same [patent_app_type] => utility [patent_app_number] => 18/281240 [patent_app_country] => US [patent_app_date] => 2022-02-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9628 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 161 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18281240 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/281240
Control device for variable compression ratio mechanism, and diagnostic method for same Feb 20, 2022 Issued
Array ( [id] => 19932366 [patent_doc_number] => 12305565 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-05-20 [patent_title] => Thermostat device [patent_app_type] => utility [patent_app_number] => 18/275089 [patent_app_country] => US [patent_app_date] => 2022-02-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 10 [patent_no_of_words] => 0 [patent_no_of_claims] => 3 [patent_no_of_ind_claims] => 1 [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] => 18275089 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/275089
Thermostat device Feb 15, 2022 Issued
Array ( [id] => 19121483 [patent_doc_number] => 11965454 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-04-23 [patent_title] => Thermostat device [patent_app_type] => utility [patent_app_number] => 18/274336 [patent_app_country] => US [patent_app_date] => 2022-02-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 13 [patent_no_of_words] => 4987 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 202 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18274336 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/274336
Thermostat device Feb 15, 2022 Issued
Menu