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] => 19528977 [patent_doc_number] => 20240352879 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-10-24 [patent_title] => COMPRESSED GAS ASSISTED INERTIAL IMPACTOR WITH ELASTOMERIC NOZZLES [patent_app_type] => utility [patent_app_number] => 18/760644 [patent_app_country] => US [patent_app_date] => 2024-07-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9756 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 120 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18760644 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/760644
Compressed gas assisted inertial impactor with elastomeric nozzles Jun 30, 2024 Issued
Array ( [id] => 20393928 [patent_doc_number] => 20250369403 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-12-04 [patent_title] => Exhaust Moderated Optimized Combustion Intake [patent_app_type] => utility [patent_app_number] => 18/679977 [patent_app_country] => US [patent_app_date] => 2024-05-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 34 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18679977 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/679977
Exhaust Moderated Optimized Combustion Intake May 30, 2024 Abandoned
Array ( [id] => 19601840 [patent_doc_number] => 20240392720 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-11-28 [patent_title] => ENGINE COOLANT MANAGEMENT [patent_app_type] => utility [patent_app_number] => 18/651652 [patent_app_country] => US [patent_app_date] => 2024-04-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7231 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [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] => 18651652 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/651652
ENGINE COOLANT MANAGEMENT Apr 29, 2024 Pending
Array ( [id] => 19557240 [patent_doc_number] => 20240369032 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-11-07 [patent_title] => FUEL INJECTOR OF AN INTERNAL COMBUSTION ENGINE AND COMBUSTION ENGINE [patent_app_type] => utility [patent_app_number] => 18/650503 [patent_app_country] => US [patent_app_date] => 2024-04-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2944 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [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] => 18650503 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/650503
Fuel injector of an internal combustion engine and combustion engine Apr 29, 2024 Issued
Array ( [id] => 20343692 [patent_doc_number] => 12467416 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-11-11 [patent_title] => Apparatus for active engine idle control [patent_app_type] => utility [patent_app_number] => 18/644224 [patent_app_country] => US [patent_app_date] => 2024-04-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 7 [patent_no_of_words] => 0 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 134 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18644224 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/644224
Apparatus for active engine idle control Apr 23, 2024 Issued
Array ( [id] => 19668142 [patent_doc_number] => 12180877 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2024-12-31 [patent_title] => Method for absorbing hydrogen in a crankcase of a hydrogen internal combustion engine, a system for a motor vehicle, and a motor vehicle [patent_app_type] => utility [patent_app_number] => 18/610258 [patent_app_country] => US [patent_app_date] => 2024-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 6385 [patent_no_of_claims] => 23 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 174 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18610258 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/610258
Method for absorbing hydrogen in a crankcase of a hydrogen internal combustion engine, a system for a motor vehicle, and a motor vehicle Mar 18, 2024 Issued
Array ( [id] => 20453586 [patent_doc_number] => 12516638 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-01-06 [patent_title] => Dual fuel engine combustion control strategy optimizing pilot shot quantities [patent_app_type] => utility [patent_app_number] => 18/602362 [patent_app_country] => US [patent_app_date] => 2024-03-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 0 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 176 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18602362 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/602362
Dual fuel engine combustion control strategy optimizing pilot shot quantities Mar 11, 2024 Issued
Array ( [id] => 19537232 [patent_doc_number] => 12129775 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-10-29 [patent_title] => Compressed gas assisted inertial impactor with elastomeric nozzles [patent_app_type] => utility [patent_app_number] => 18/602706 [patent_app_country] => US [patent_app_date] => 2024-03-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 12 [patent_figures_cnt] => 13 [patent_no_of_words] => 9741 [patent_no_of_claims] => 7 [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] => 18602706 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/602706
Compressed gas assisted inertial impactor with elastomeric nozzles Mar 11, 2024 Issued
Array ( [id] => 19810059 [patent_doc_number] => 12241435 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-03-04 [patent_title] => Exhaust gas recirculation valve assembly [patent_app_type] => utility [patent_app_number] => 18/428818 [patent_app_country] => US [patent_app_date] => 2024-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 12 [patent_figures_cnt] => 16 [patent_no_of_words] => 5643 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 328 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18428818 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/428818
Exhaust gas recirculation valve assembly Jan 30, 2024 Issued
Array ( [id] => 20343702 [patent_doc_number] => 12467426 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-11-11 [patent_title] => Fuel injection systems for snowmobiles [patent_app_type] => utility [patent_app_number] => 18/428166 [patent_app_country] => US [patent_app_date] => 2024-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 18 [patent_no_of_words] => 1968 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 129 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18428166 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/428166
Fuel injection systems for snowmobiles Jan 30, 2024 Issued
Array ( [id] => 20122148 [patent_doc_number] => 20250237179 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-07-24 [patent_title] => DUAL LIQUEFIED PETROLEUM GAS VAPOR AND LIQUID INJECTION SYSTEM AND METHOD OF CONTROL [patent_app_type] => utility [patent_app_number] => 18/420420 [patent_app_country] => US [patent_app_date] => 2024-01-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6013 [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] => 18420420 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/420420
Dual liquefied petroleum gas vapor and liquid injection system and method of control Jan 22, 2024 Issued
Array ( [id] => 19331965 [patent_doc_number] => 20240246395 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-07-25 [patent_title] => POWER UNIT STRUCTURE [patent_app_type] => utility [patent_app_number] => 18/416932 [patent_app_country] => US [patent_app_date] => 2024-01-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5831 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 94 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18416932 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/416932
POWER UNIT STRUCTURE Jan 18, 2024 Abandoned
Array ( [id] => 20108935 [patent_doc_number] => 12359644 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-07-15 [patent_title] => Non-road engine [patent_app_type] => utility [patent_app_number] => 18/398280 [patent_app_country] => US [patent_app_date] => 2023-12-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 0 [patent_no_of_claims] => 11 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 144 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18398280 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/398280
Non-road engine Dec 27, 2023 Issued
Array ( [id] => 20060140 [patent_doc_number] => 20250198362 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-19 [patent_title] => PROFILED COVER PLATE FOR A PISTON [patent_app_type] => utility [patent_app_number] => 18/544404 [patent_app_country] => US [patent_app_date] => 2023-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3503 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 188 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18544404 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/544404
PROFILED COVER PLATE FOR A PISTON Dec 17, 2023 Pending
Array ( [id] => 19923521 [patent_doc_number] => 12297793 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2025-05-13 [patent_title] => Hydrogen capture canister [patent_app_type] => utility [patent_app_number] => 18/388367 [patent_app_country] => US [patent_app_date] => 2023-11-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 0 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 172 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18388367 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/388367
Hydrogen capture canister Nov 8, 2023 Issued
Array ( [id] => 19877501 [patent_doc_number] => 20250109758 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-04-03 [patent_title] => DUCT HAVING AIR DIRECTION FEATURE [patent_app_type] => utility [patent_app_number] => 18/476596 [patent_app_country] => US [patent_app_date] => 2023-09-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3799 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 178 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18476596 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/476596
Duct having air direction feature Sep 27, 2023 Issued
Array ( [id] => 19676546 [patent_doc_number] => 12188398 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-07 [patent_title] => Thermal management and control method and device, storage medium, and vehicle [patent_app_type] => utility [patent_app_number] => 18/373233 [patent_app_country] => US [patent_app_date] => 2023-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 6 [patent_no_of_words] => 7183 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 228 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18373233 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/373233
Thermal management and control method and device, storage medium, and vehicle Sep 25, 2023 Issued
Array ( [id] => 19580352 [patent_doc_number] => 12146456 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-11-19 [patent_title] => Control device for fuel vapor treatment apparatus [patent_app_type] => utility [patent_app_number] => 18/465457 [patent_app_country] => US [patent_app_date] => 2023-09-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 4225 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 209 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18465457 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/465457
Control device for fuel vapor treatment apparatus Sep 11, 2023 Issued
Array ( [id] => 19833025 [patent_doc_number] => 20250084811 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-03-13 [patent_title] => FUEL GAS HEATING SYSTEM [patent_app_type] => utility [patent_app_number] => 18/574698 [patent_app_country] => US [patent_app_date] => 2023-08-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4430 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 71 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18574698 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/574698
FUEL GAS HEATING SYSTEM Aug 28, 2023 Pending
Array ( [id] => 19676549 [patent_doc_number] => 12188401 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-07 [patent_title] => Internal combustion engine and lubrication system thereof [patent_app_type] => utility [patent_app_number] => 18/451430 [patent_app_country] => US [patent_app_date] => 2023-08-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 25 [patent_figures_cnt] => 25 [patent_no_of_words] => 9228 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 191 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18451430 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/451430
Internal combustion engine and lubrication system thereof Aug 16, 2023 Issued
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