Search

David W Duffy

Examiner (ID: 931, Phone: (571)272-1574 , Office: P/3716 )

Most Active Art Unit
3716
Art Unit(s)
3700, 3714, 3716, 3715
Total Applications
553
Issued Applications
291
Pending Applications
12
Abandoned Applications
250

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 17030531 [patent_doc_number] => 11092338 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-08-17 [patent_title] => Method for constructing impingement/effusion cooling features in a component of a combustion turbine engine [patent_app_type] => utility [patent_app_number] => 16/609336 [patent_app_country] => US [patent_app_date] => 2018-06-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 8 [patent_no_of_words] => 2350 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 2 [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] => 16609336 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/609336
Method for constructing impingement/effusion cooling features in a component of a combustion turbine engine Jun 27, 2018 Issued
Array ( [id] => 15833423 [patent_doc_number] => 20200131993 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-04-30 [patent_title] => METHOD FOR IMPROVING THE PERFORMANCE OF A GAS TURBINE [patent_app_type] => utility [patent_app_number] => 16/628667 [patent_app_country] => US [patent_app_date] => 2018-06-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3705 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 262 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16628667 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/628667
METHOD FOR IMPROVING THE PERFORMANCE OF A GAS TURBINE Jun 26, 2018 Abandoned
Array ( [id] => 15179615 [patent_doc_number] => 20190360399 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-11-28 [patent_title] => SYSTEM AND METHOD TO PROMOTE EARLY AND DIFFERENTIAL ICE SHEDDING [patent_app_type] => utility [patent_app_number] => 15/989807 [patent_app_country] => US [patent_app_date] => 2018-05-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2335 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 49 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15989807 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/989807
SYSTEM AND METHOD TO PROMOTE EARLY AND DIFFERENTIAL ICE SHEDDING May 24, 2018 Abandoned
Array ( [id] => 13589179 [patent_doc_number] => 20180346138 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-12-06 [patent_title] => AIRCRAFT PROPULSION SYSTEM COMPRISING A NACELLE WITH AN ENHANCED OPENING SYSTEM [patent_app_type] => utility [patent_app_number] => 15/984622 [patent_app_country] => US [patent_app_date] => 2018-05-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3202 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 275 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15984622 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/984622
AIRCRAFT PROPULSION SYSTEM COMPRISING A NACELLE WITH AN ENHANCED OPENING SYSTEM May 20, 2018 Abandoned
Array ( [id] => 18748908 [patent_doc_number] => 11808210 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-07 [patent_title] => Intercooled cooling air with heat exchanger packaging [patent_app_type] => utility [patent_app_number] => 15/978517 [patent_app_country] => US [patent_app_date] => 2018-05-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 16 [patent_no_of_words] => 4723 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 314 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15978517 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/978517
Intercooled cooling air with heat exchanger packaging May 13, 2018 Issued
Array ( [id] => 16321794 [patent_doc_number] => 10781751 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2020-09-22 [patent_title] => Gas turbine engine secondary air system and axial thrust management system for a rotor of the engine [patent_app_type] => utility [patent_app_number] => 15/928500 [patent_app_country] => US [patent_app_date] => 2018-03-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 1 [patent_no_of_words] => 1418 [patent_no_of_claims] => 2 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 223 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15928500 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/928500
Gas turbine engine secondary air system and axial thrust management system for a rotor of the engine Mar 21, 2018 Issued
Array ( [id] => 14898509 [patent_doc_number] => 20190293020 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-26 [patent_title] => FLEXIBLE SLEEVE FOR ADJUSTABLE FAN DUCT NOZZLE [patent_app_type] => utility [patent_app_number] => 15/927669 [patent_app_country] => US [patent_app_date] => 2018-03-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7532 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 186 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15927669 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/927669
FLEXIBLE SLEEVE FOR ADJUSTABLE FAN DUCT NOZZLE Mar 20, 2018 Abandoned
Array ( [id] => 16507153 [patent_doc_number] => 20200386409 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-12-10 [patent_title] => FINELY DISTRIBUTED COMBUSTION SYSTEM FOR A GAS TURBINE ENGINE [patent_app_type] => utility [patent_app_number] => 15/733516 [patent_app_country] => US [patent_app_date] => 2018-03-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4029 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [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] => 15733516 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/733516
Finely distributed combustion system for a gas turbine engine Mar 8, 2018 Issued
Array ( [id] => 16785328 [patent_doc_number] => 10987733 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-04-27 [patent_title] => Components having vibration dampers enclosed therein and methods of forming such components [patent_app_type] => utility [patent_app_number] => 15/903010 [patent_app_country] => US [patent_app_date] => 2018-02-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 4 [patent_no_of_words] => 3687 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 159 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15903010 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/903010
Components having vibration dampers enclosed therein and methods of forming such components Feb 21, 2018 Issued
Array ( [id] => 15528965 [patent_doc_number] => 20200056788 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-02-20 [patent_title] => COMBUSTOR AND GAS TURBINE [patent_app_type] => utility [patent_app_number] => 16/486604 [patent_app_country] => US [patent_app_date] => 2018-02-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9121 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 92 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16486604 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/486604
COMBUSTOR AND GAS TURBINE Feb 20, 2018 Abandoned
Array ( [id] => 17421850 [patent_doc_number] => 11255295 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-02-22 [patent_title] => Propulsion assembly comprising a duct for feeding the gas generator in an inter-duct casing [patent_app_type] => utility [patent_app_number] => 15/785953 [patent_app_country] => US [patent_app_date] => 2017-10-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 7 [patent_no_of_words] => 3815 [patent_no_of_claims] => 4 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 503 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15785953 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/785953
Propulsion assembly comprising a duct for feeding the gas generator in an inter-duct casing Oct 16, 2017 Issued
Array ( [id] => 12815374 [patent_doc_number] => 20180163628 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-06-14 [patent_title] => Methods for Startup and Operation of Gas Turbine Combined Cycle Power Plants Using NMHC Fuels [patent_app_type] => utility [patent_app_number] => 15/728883 [patent_app_country] => US [patent_app_date] => 2017-10-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4411 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [patent_words_short_claim] => 122 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15728883 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/728883
Methods for startup and operation of gas turbine combined cycle power plants using NMHC fuels Oct 9, 2017 Issued
Array ( [id] => 14159913 [patent_doc_number] => 20190107059 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-04-11 [patent_title] => COOLED COMBUSTOR CONFIGURATION [patent_app_type] => utility [patent_app_number] => 15/729148 [patent_app_country] => US [patent_app_date] => 2017-10-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4621 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 15729148 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/729148
COOLED COMBUSTOR CONFIGURATION Oct 9, 2017 Abandoned
Array ( [id] => 17090294 [patent_doc_number] => 11118474 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-09-14 [patent_title] => Vane cooling structures [patent_app_type] => utility [patent_app_number] => 15/727816 [patent_app_country] => US [patent_app_date] => 2017-10-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 8 [patent_no_of_words] => 6935 [patent_no_of_claims] => 15 [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] => 15727816 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/727816
Vane cooling structures Oct 8, 2017 Issued
Array ( [id] => 14159887 [patent_doc_number] => 20190107046 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-04-11 [patent_title] => TURBINE ENGINE WITH STRUTS [patent_app_type] => utility [patent_app_number] => 15/725327 [patent_app_country] => US [patent_app_date] => 2017-10-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3353 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -24 [patent_words_short_claim] => 103 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15725327 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/725327
TURBINE ENGINE WITH STRUTS Oct 4, 2017 Abandoned
Array ( [id] => 17135590 [patent_doc_number] => 11137140 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-10-05 [patent_title] => Dilution holes with ridge feature for gas turbine engines [patent_app_type] => utility [patent_app_number] => 15/725019 [patent_app_country] => US [patent_app_date] => 2017-10-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 18 [patent_no_of_words] => 6771 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 3 [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] => 15725019 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/725019
Dilution holes with ridge feature for gas turbine engines Oct 3, 2017 Issued
Array ( [id] => 13495175 [patent_doc_number] => 20180299130 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-10-18 [patent_title] => COMBUSTOR NOZZLE ASSEMBLY AND GAS TURBINE HAVING THE SAME [patent_app_type] => utility [patent_app_number] => 15/714800 [patent_app_country] => US [patent_app_date] => 2017-09-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2809 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 78 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15714800 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/714800
Combustor nozzle assembly and gas turbine having the same Sep 24, 2017 Issued
Array ( [id] => 14104431 [patent_doc_number] => 20190093891 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-03-28 [patent_title] => GAS TURBINE ASSEMBLIES AND METHODS [patent_app_type] => utility [patent_app_number] => 15/714118 [patent_app_country] => US [patent_app_date] => 2017-09-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7091 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [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] => 15714118 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/714118
Gas turbine assemblies and methods Sep 24, 2017 Issued
Array ( [id] => 13523377 [patent_doc_number] => 20180313231 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-11-01 [patent_title] => EXHAUST DIFFUSER HAVING EJECTION HOLE AND SUCTION HOLE, AND GAS TURBINE HAVING THE SAME [patent_app_type] => utility [patent_app_number] => 15/708678 [patent_app_country] => US [patent_app_date] => 2017-09-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3671 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [patent_words_short_claim] => 127 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15708678 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/708678
Exhaust diffuser having ejection hole and suction hole, and gas turbine having the same Sep 18, 2017 Issued
Array ( [id] => 14044821 [patent_doc_number] => 20190078517 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-03-14 [patent_title] => METHOD AND SYSTEM FOR DIRECTING FUEL FLOW TO AN ENGINE [patent_app_type] => utility [patent_app_number] => 15/700381 [patent_app_country] => US [patent_app_date] => 2017-09-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5031 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 90 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15700381 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/700381
METHOD AND SYSTEM FOR DIRECTING FUEL FLOW TO AN ENGINE Sep 10, 2017 Abandoned
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