Search

Thomas C. Barrett

Supervisory Patent Examiner (ID: 15107, Phone: (571)272-4746 , Office: P/3700 )

Most Active Art Unit
3738
Art Unit(s)
3799, 3738, 3700, 3775
Total Applications
415
Issued Applications
210
Pending Applications
106
Abandoned Applications
101

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 2575149 [patent_doc_number] => 04958598 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-09-25 [patent_title] => 'Engine emissions control apparatus and method' [patent_app_type] => 1 [patent_app_number] => 7/419254 [patent_app_country] => US [patent_app_date] => 1989-10-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 10 [patent_no_of_words] => 6568 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 102 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/958/04958598.pdf [firstpage_image] =>[orig_patent_app_number] => 419254 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/419254
Engine emissions control apparatus and method Oct 9, 1989 Issued
Array ( [id] => 2676048 [patent_doc_number] => 04989560 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-02-05 [patent_title] => 'Automotive engine oil level surveillance system' [patent_app_type] => 1 [patent_app_number] => 7/416496 [patent_app_country] => US [patent_app_date] => 1989-10-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 10 [patent_no_of_words] => 4409 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 204 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/989/04989560.pdf [firstpage_image] =>[orig_patent_app_number] => 416496 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/416496
Automotive engine oil level surveillance system Oct 2, 1989 Issued
Array ( [id] => 2580538 [patent_doc_number] => 04974566 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-12-04 [patent_title] => 'Optimal swirl generation by valve control' [patent_app_type] => 1 [patent_app_number] => 7/413643 [patent_app_country] => US [patent_app_date] => 1989-09-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 15 [patent_no_of_words] => 4333 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 211 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/974/04974566.pdf [firstpage_image] =>[orig_patent_app_number] => 413643 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/413643
Optimal swirl generation by valve control Sep 27, 1989 Issued
Array ( [id] => 2637604 [patent_doc_number] => 04928645 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-29 [patent_title] => 'Ceramic composite valve for internal combustion engines and the like' [patent_app_type] => 1 [patent_app_number] => 7/406997 [patent_app_country] => US [patent_app_date] => 1989-09-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 4 [patent_no_of_words] => 4171 [patent_no_of_claims] => 26 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 94 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/928/04928645.pdf [firstpage_image] =>[orig_patent_app_number] => 406997 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/406997
Ceramic composite valve for internal combustion engines and the like Sep 13, 1989 Issued
Array ( [id] => 2676011 [patent_doc_number] => 04989558 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1991-02-05 [patent_title] => 'Spherical rotary valve assembly for an internal combustion engine' [patent_app_type] => 1 [patent_app_number] => 7/409037 [patent_app_country] => US [patent_app_date] => 1989-09-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 16 [patent_no_of_words] => 4727 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 82 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/989/04989558.pdf [firstpage_image] =>[orig_patent_app_number] => 409037 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/409037
Spherical rotary valve assembly for an internal combustion engine Sep 13, 1989 Issued
Array ( [id] => 2613313 [patent_doc_number] => 04936272 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-06-26 [patent_title] => 'Prelube system' [patent_app_type] => 1 [patent_app_number] => 7/405441 [patent_app_country] => US [patent_app_date] => 1989-09-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 8 [patent_no_of_words] => 2733 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 402 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/936/04936272.pdf [firstpage_image] =>[orig_patent_app_number] => 405441 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/405441
Prelube system Sep 10, 1989 Issued
Array ( [id] => 2584152 [patent_doc_number] => 04969918 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-11-13 [patent_title] => 'Rotary valve operating mechanism' [patent_app_type] => 1 [patent_app_number] => 7/403362 [patent_app_country] => US [patent_app_date] => 1989-09-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 10 [patent_no_of_words] => 2730 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 72 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/969/04969918.pdf [firstpage_image] =>[orig_patent_app_number] => 403362 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/403362
Rotary valve operating mechanism Sep 5, 1989 Issued
Array ( [id] => 2613454 [patent_doc_number] => 04936280 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-06-26 [patent_title] => 'Electronic dual fuel injection system' [patent_app_type] => 1 [patent_app_number] => 7/394612 [patent_app_country] => US [patent_app_date] => 1989-08-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 1702 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 123 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/936/04936280.pdf [firstpage_image] =>[orig_patent_app_number] => 394612 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/394612
Electronic dual fuel injection system Aug 15, 1989 Issued
Array ( [id] => 2569473 [patent_doc_number] => 04926809 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-22 [patent_title] => 'Internal combustion engine with rotary valve' [patent_app_type] => 1 [patent_app_number] => 7/392068 [patent_app_country] => US [patent_app_date] => 1989-08-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 1903 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 150 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/926/04926809.pdf [firstpage_image] =>[orig_patent_app_number] => 392068 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/392068
Internal combustion engine with rotary valve Aug 9, 1989 Issued
Array ( [id] => 2644029 [patent_doc_number] => 04945867 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-08-07 [patent_title] => 'Two-stroke engine' [patent_app_type] => 1 [patent_app_number] => 7/391786 [patent_app_country] => US [patent_app_date] => 1989-08-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 31 [patent_no_of_words] => 8348 [patent_no_of_claims] => 37 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 203 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/945/04945867.pdf [firstpage_image] =>[orig_patent_app_number] => 391786 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/391786
Two-stroke engine Aug 8, 1989 Issued
Array ( [id] => 2577063 [patent_doc_number] => 04922871 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-08 [patent_title] => 'Arrangement for the purification of lubricating oil' [patent_app_type] => 1 [patent_app_number] => 7/390106 [patent_app_country] => US [patent_app_date] => 1989-08-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 4 [patent_no_of_words] => 1163 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 156 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/922/04922871.pdf [firstpage_image] =>[orig_patent_app_number] => 390106 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/390106
Arrangement for the purification of lubricating oil Aug 7, 1989 Issued
Array ( [id] => 2544983 [patent_doc_number] => 04941440 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-07-17 [patent_title] => 'Engine including a piston member having a high top ring groove' [patent_app_type] => 1 [patent_app_number] => 7/391647 [patent_app_country] => US [patent_app_date] => 1989-08-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 6 [patent_no_of_words] => 4342 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 282 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/941/04941440.pdf [firstpage_image] =>[orig_patent_app_number] => 391647 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/391647
Engine including a piston member having a high top ring groove Aug 6, 1989 Issued
Array ( [id] => 2637584 [patent_doc_number] => 04928644 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-29 [patent_title] => 'Lubrication control' [patent_app_type] => 1 [patent_app_number] => 7/387358 [patent_app_country] => US [patent_app_date] => 1989-07-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 1704 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 52 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/928/04928644.pdf [firstpage_image] =>[orig_patent_app_number] => 387358 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/387358
Lubrication control Jul 29, 1989 Issued
Array ( [id] => 2548069 [patent_doc_number] => 04944265 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-07-31 [patent_title] => 'Oil restricting head gasket construction' [patent_app_type] => 1 [patent_app_number] => 7/383504 [patent_app_country] => US [patent_app_date] => 1989-07-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 3 [patent_no_of_words] => 1053 [patent_no_of_claims] => 4 [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] => patents/04/944/04944265.pdf [firstpage_image] =>[orig_patent_app_number] => 383504 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/383504
Oil restricting head gasket construction Jul 23, 1989 Issued
Array ( [id] => 2765809 [patent_doc_number] => 05092281 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1992-03-03 [patent_title] => 'Hydrogen engine system' [patent_app_type] => 1 [patent_app_number] => 7/384302 [patent_app_country] => US [patent_app_date] => 1989-07-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 12 [patent_figures_cnt] => 18 [patent_no_of_words] => 8673 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 172 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/092/05092281.pdf [firstpage_image] =>[orig_patent_app_number] => 384302 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/384302
Hydrogen engine system Jul 23, 1989 Issued
07/383732 ROTARY VANED VALVES Jul 20, 1989 Abandoned
Array ( [id] => 2513063 [patent_doc_number] => 04887579 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1989-12-19 [patent_title] => 'LP-Gas carburetion system apparatus and method' [patent_app_type] => 1 [patent_app_number] => 7/378828 [patent_app_country] => US [patent_app_date] => 1989-07-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 4 [patent_no_of_words] => 2301 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 57 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/887/04887579.pdf [firstpage_image] =>[orig_patent_app_number] => 378828 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/378828
LP-Gas carburetion system apparatus and method Jul 11, 1989 Issued
Array ( [id] => 2569561 [patent_doc_number] => 04926814 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-05-22 [patent_title] => 'Crankcase breather and lubrication oil system for an internal combustion engine' [patent_app_type] => 1 [patent_app_number] => 7/378867 [patent_app_country] => US [patent_app_date] => 1989-07-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 2664 [patent_no_of_claims] => 16 [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] => patents/04/926/04926814.pdf [firstpage_image] =>[orig_patent_app_number] => 378867 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/378867
Crankcase breather and lubrication oil system for an internal combustion engine Jul 11, 1989 Issued
Array ( [id] => 2644061 [patent_doc_number] => 04961408 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-10-09 [patent_title] => 'Pistons for reciprocating machines' [patent_app_type] => 1 [patent_app_number] => 7/378023 [patent_app_country] => US [patent_app_date] => 1989-07-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 2 [patent_no_of_words] => 877 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 54 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/961/04961408.pdf [firstpage_image] =>[orig_patent_app_number] => 378023 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/378023
Pistons for reciprocating machines Jul 10, 1989 Issued
Array ( [id] => 2615885 [patent_doc_number] => 04976226 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1990-12-11 [patent_title] => 'Method for increasing the heat efficiency of a piston combustion engine' [patent_app_type] => 1 [patent_app_number] => 7/378139 [patent_app_country] => US [patent_app_date] => 1989-07-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1281 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 170 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/04/976/04976226.pdf [firstpage_image] =>[orig_patent_app_number] => 378139 [rel_patent_id] =>[rel_patent_doc_number] =>)
07/378139
Method for increasing the heat efficiency of a piston combustion engine Jul 10, 1989 Issued
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