Search

Douglas Q. Tran

Examiner (ID: 7418, Phone: (571)272-7442 , Office: P/2672 )

Most Active Art Unit
2672
Art Unit(s)
2724, 2673, 2672, 2624, 2625
Total Applications
1570
Issued Applications
1490
Pending Applications
8
Abandoned Applications
75

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 18285834 [patent_doc_number] => 20230101306 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-30 [patent_title] => STORAGE OF EXCESS HEAT IN COLD SIDE OF HEAT ENGINE [patent_app_type] => utility [patent_app_number] => 18/059121 [patent_app_country] => US [patent_app_date] => 2022-11-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 28291 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 99 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18059121 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/059121
STORAGE OF EXCESS HEAT IN COLD SIDE OF HEAT ENGINE Nov 27, 2022 Abandoned
Array ( [id] => 19746501 [patent_doc_number] => 20250035066 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-01-30 [patent_title] => A SYSTEM AND A METHOD FOR CONTROLLING THE POWER OUTPUT OF A STIRLING ENGINE [patent_app_type] => utility [patent_app_number] => 18/713797 [patent_app_country] => US [patent_app_date] => 2022-11-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4795 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 189 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18713797 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/713797
A SYSTEM AND A METHOD FOR CONTROLLING THE POWER OUTPUT OF A STIRLING ENGINE Nov 24, 2022 Abandoned
Array ( [id] => 20060177 [patent_doc_number] => 20250198399 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-19 [patent_title] => CRYOGENIC LIQUID RECIPROCATING PUMP WITH A CYLINDER STRUCTURE FOR COOLING ASSISTANCE [patent_app_type] => utility [patent_app_number] => 18/687365 [patent_app_country] => US [patent_app_date] => 2022-11-25 [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] => -12 [patent_words_short_claim] => 146 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18687365 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/687365
CRYOGENIC LIQUID RECIPROCATING PUMP WITH A CYLINDER STRUCTURE FOR COOLING ASSISTANCE Nov 24, 2022 Pending
Array ( [id] => 19693674 [patent_doc_number] => 20250012219 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-01-09 [patent_title] => ENGINE [patent_app_type] => utility [patent_app_number] => 18/711182 [patent_app_country] => US [patent_app_date] => 2022-11-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4665 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 126 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18711182 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/711182
Engine Nov 17, 2022 Issued
Array ( [id] => 20294192 [patent_doc_number] => 20250319435 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-16 [patent_title] => GEOTHERMAL CARBON CAPTURE SYSTEM [patent_app_type] => utility [patent_app_number] => 18/710119 [patent_app_country] => US [patent_app_date] => 2022-11-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4569 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 115 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18710119 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/710119
Geothermal carbon capture system Nov 17, 2022 Issued
Array ( [id] => 20248690 [patent_doc_number] => 20250297559 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-09-25 [patent_title] => SUPERCRITICAL CARBON DIOXIDE REGENERATIVE BRAYTON CYCLE WITH MULTIPLE RECUPERATORS AND AUXILIARY COMPRESSORS [patent_app_type] => utility [patent_app_number] => 18/708913 [patent_app_country] => US [patent_app_date] => 2022-11-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2159 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => 0 [patent_words_short_claim] => 649 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18708913 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/708913
Supercritical carbon dioxide regenerative Brayton cycle with multiple recuperators and auxiliary compressors Nov 10, 2022 Issued
Array ( [id] => 19659194 [patent_doc_number] => 20240426259 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-12-26 [patent_title] => THERMAL OSCILLATION SYSTEMS [patent_app_type] => utility [patent_app_number] => 18/708219 [patent_app_country] => US [patent_app_date] => 2022-11-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 13377 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 82 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18708219 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/708219
Thermal oscillation systems Nov 9, 2022 Issued
Array ( [id] => 19441840 [patent_doc_number] => 12092086 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-09-17 [patent_title] => Geopressure and geothermal power system [patent_app_type] => utility [patent_app_number] => 18/264651 [patent_app_country] => US [patent_app_date] => 2022-11-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 6372 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 63 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18264651 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/264651
Geopressure and geothermal power system Nov 6, 2022 Issued
Array ( [id] => 18361072 [patent_doc_number] => 20230142663 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-05-11 [patent_title] => STIRLING ENGINE [patent_app_type] => utility [patent_app_number] => 17/982196 [patent_app_country] => US [patent_app_date] => 2022-11-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5751 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 65 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17982196 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/982196
Stirling engine Nov 6, 2022 Issued
Array ( [id] => 18254537 [patent_doc_number] => 20230081576 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-16 [patent_title] => PUMPED HEAT ENERGY STORAGE SYSTEM WITH LOAD FOLLOWING [patent_app_type] => utility [patent_app_number] => 18/051253 [patent_app_country] => US [patent_app_date] => 2022-10-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 55820 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 104 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18051253 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/051253
Pumped heat energy storage system with load following Oct 30, 2022 Issued
Array ( [id] => 20302970 [patent_doc_number] => 12448954 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-10-21 [patent_title] => Buoyant force utilization device [patent_app_type] => utility [patent_app_number] => 18/704599 [patent_app_country] => US [patent_app_date] => 2022-10-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 5369 [patent_no_of_claims] => 7 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 409 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18704599 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/704599
Buoyant force utilization device Oct 27, 2022 Issued
Array ( [id] => 18710219 [patent_doc_number] => 20230332843 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-10-19 [patent_title] => COMPRESSED GAS ENERGY STORAGE SYSTEM [patent_app_type] => utility [patent_app_number] => 17/974363 [patent_app_country] => US [patent_app_date] => 2022-10-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 24076 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 310 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17974363 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/974363
Compressed gas energy storage system Oct 25, 2022 Issued
Array ( [id] => 18338297 [patent_doc_number] => 20230130246 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-04-27 [patent_title] => GeoHeat Harvesting Enhancement [patent_app_type] => utility [patent_app_number] => 17/970892 [patent_app_country] => US [patent_app_date] => 2022-10-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7229 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 76 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17970892 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/970892
GeoHeat harvesting enhancement Oct 20, 2022 Issued
Array ( [id] => 19113555 [patent_doc_number] => 20240125305 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-04-18 [patent_title] => ENERGY PRODUCTION FROM DEEP OCEAN PRESSURE [patent_app_type] => utility [patent_app_number] => 18/046334 [patent_app_country] => US [patent_app_date] => 2022-10-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5738 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [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] => 18046334 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/046334
ENERGY PRODUCTION FROM DEEP OCEAN PRESSURE Oct 12, 2022 Abandoned
Array ( [id] => 19242727 [patent_doc_number] => 12013155 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-06-18 [patent_title] => Self-contained in-ground geothermal generator and heat exchanger with in-line pump used in several alternative applications including the restoration of the Salton Sea [patent_app_type] => utility [patent_app_number] => 18/045691 [patent_app_country] => US [patent_app_date] => 2022-10-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 134 [patent_figures_cnt] => 155 [patent_no_of_words] => 46726 [patent_no_of_claims] => 25 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 848 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18045691 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/045691
Self-contained in-ground geothermal generator and heat exchanger with in-line pump used in several alternative applications including the restoration of the Salton Sea Oct 10, 2022 Issued
Array ( [id] => 18164914 [patent_doc_number] => 20230031511 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-02-02 [patent_title] => AIRCRAFT POWER PLANT WITH SUPERCRITICAL CO2 HEAT ENGINE [patent_app_type] => utility [patent_app_number] => 17/957058 [patent_app_country] => US [patent_app_date] => 2022-09-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4084 [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] => 17957058 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/957058
Aircraft power plant with supercritical CO Sep 29, 2022 Issued
Array ( [id] => 19904665 [patent_doc_number] => 12281662 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-04-22 [patent_title] => Fluid pressure actuator [patent_app_type] => utility [patent_app_number] => 18/713701 [patent_app_country] => US [patent_app_date] => 2022-09-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 13 [patent_no_of_words] => 3252 [patent_no_of_claims] => 12 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 109 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18713701 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/713701
Fluid pressure actuator Sep 27, 2022 Issued
Array ( [id] => 19601822 [patent_doc_number] => 20240392702 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-11-28 [patent_title] => DOWNHOLE HEAT EXCHANGER FOR GEOTHERMAL POWER SYSTEMS [patent_app_type] => utility [patent_app_number] => 18/694323 [patent_app_country] => US [patent_app_date] => 2022-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10299 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 133 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18694323 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/694323
DOWNHOLE HEAT EXCHANGER FOR GEOTHERMAL POWER SYSTEMS Sep 25, 2022 Abandoned
Array ( [id] => 19027782 [patent_doc_number] => 11927130 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-03-12 [patent_title] => Pump control of closed cycle power generation system [patent_app_type] => utility [patent_app_number] => 17/952753 [patent_app_country] => US [patent_app_date] => 2022-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 29 [patent_figures_cnt] => 32 [patent_no_of_words] => 32310 [patent_no_of_claims] => 23 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 170 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17952753 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/952753
Pump control of closed cycle power generation system Sep 25, 2022 Issued
Array ( [id] => 19615824 [patent_doc_number] => 20240401504 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-12-05 [patent_title] => LNG COLD POWER GENERATION USING MIXED WORKING FLUID [patent_app_type] => utility [patent_app_number] => 18/698658 [patent_app_country] => US [patent_app_date] => 2022-09-23 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2907 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 23 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18698658 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/698658
LNG COLD POWER GENERATION USING MIXED WORKING FLUID Sep 22, 2022 Pending
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