Search

Richard K. Chang

Examiner (ID: 15304, Phone: (571)270-3368 , Office: P/2464 )

Most Active Art Unit
2464
Art Unit(s)
2663, 2464, 2616
Total Applications
302
Issued Applications
252
Pending Applications
10
Abandoned Applications
46

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 14867245 [patent_doc_number] => 20190283864 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-19 [patent_title] => COUNTER-ROTATING PROPELLER SYSTEM WITH CAPABILITY TO STOP ROTATION OF ONE ROW [patent_app_type] => utility [patent_app_number] => 15/924030 [patent_app_country] => US [patent_app_date] => 2018-03-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1086 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 15924030 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/924030
COUNTER-ROTATING PROPELLER SYSTEM WITH CAPABILITY TO STOP ROTATION OF ONE ROW Mar 15, 2018 Abandoned
Array ( [id] => 14869389 [patent_doc_number] => 20190284936 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-19 [patent_title] => GAS TURBINE ENGINE ROTOR DISK [patent_app_type] => utility [patent_app_number] => 15/921825 [patent_app_country] => US [patent_app_date] => 2018-03-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3205 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 56 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15921825 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/921825
GAS TURBINE ENGINE ROTOR DISK Mar 14, 2018 Abandoned
Array ( [id] => 14837703 [patent_doc_number] => 20190277252 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-12 [patent_title] => Systems and Methods for Maximizing Wind Energy [patent_app_type] => utility [patent_app_number] => 15/918687 [patent_app_country] => US [patent_app_date] => 2018-03-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5040 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [patent_words_short_claim] => 69 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15918687 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/918687
Systems and Methods for Maximizing Wind Energy Mar 11, 2018 Abandoned
Array ( [id] => 15899801 [patent_doc_number] => 20200149419 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-05-14 [patent_title] => Aerodynamic or Hydrodynamic Blade made of Layered Material [patent_app_type] => utility [patent_app_number] => 16/481835 [patent_app_country] => US [patent_app_date] => 2018-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3124 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -24 [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] => 16481835 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/481835
Aerodynamic or hydrodynamic blade made of layered material Jan 30, 2018 Issued
Array ( [id] => 17939110 [patent_doc_number] => 11473555 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-10-18 [patent_title] => Wind turbine blade comprising a trailing edge noise reducing device [patent_app_type] => utility [patent_app_number] => 16/476951 [patent_app_country] => US [patent_app_date] => 2018-01-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 16 [patent_no_of_words] => 9102 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 340 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16476951 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/476951
Wind turbine blade comprising a trailing edge noise reducing device Jan 11, 2018 Issued
Array ( [id] => 15149329 [patent_doc_number] => 20190353142 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-11-21 [patent_title] => WIND TURBINE BLADE COMPRISING A TRAILING EDGE NOISE REDUCING DEVICE [patent_app_type] => utility [patent_app_number] => 16/477022 [patent_app_country] => US [patent_app_date] => 2018-01-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7998 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 315 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16477022 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/477022
WIND TURBINE BLADE COMPRISING A TRAILING EDGE NOISE REDUCING DEVICE Jan 11, 2018 Abandoned
Array ( [id] => 16140821 [patent_doc_number] => 10703469 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-07-07 [patent_title] => Compact folding yoke with flexible yoke arms in a folding rotor blade assembly [patent_app_type] => utility [patent_app_number] => 15/845876 [patent_app_country] => US [patent_app_date] => 2017-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 11 [patent_no_of_words] => 4931 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 89 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15845876 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/845876
Compact folding yoke with flexible yoke arms in a folding rotor blade assembly Dec 17, 2017 Issued
Array ( [id] => 12815125 [patent_doc_number] => 20180163545 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-06-14 [patent_title] => COOLING STRUCTURE FOR VANE [patent_app_type] => utility [patent_app_number] => 15/835226 [patent_app_country] => US [patent_app_date] => 2017-12-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7619 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 95 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15835226 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/835226
Cooling structure for vane Dec 6, 2017 Issued
Array ( [id] => 13344631 [patent_doc_number] => 20180223855 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-08-09 [patent_title] => METHOD FOR CONTROLLING ROTATIONAL SPEED OF MOTOR OF FAN [patent_app_type] => utility [patent_app_number] => 15/832868 [patent_app_country] => US [patent_app_date] => 2017-12-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3988 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 74 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15832868 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/832868
METHOD FOR CONTROLLING ROTATIONAL SPEED OF MOTOR OF FAN Dec 5, 2017 Abandoned
Array ( [id] => 12793210 [patent_doc_number] => 20180156239 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-06-07 [patent_title] => TURBINE ENGINE PART WITH NON-AXISYMMETRIC SURFACE [patent_app_type] => utility [patent_app_number] => 15/831706 [patent_app_country] => US [patent_app_date] => 2017-12-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4865 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 169 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15831706 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/831706
Turbine engine part with non-axisymmetric surface Dec 4, 2017 Issued
Array ( [id] => 16430015 [patent_doc_number] => 10830090 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-11-10 [patent_title] => Vane actuating mechanism having a laterally mounted actuating lever [patent_app_type] => utility [patent_app_number] => 15/825962 [patent_app_country] => US [patent_app_date] => 2017-11-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 11 [patent_no_of_words] => 5309 [patent_no_of_claims] => 14 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 83 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15825962 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/825962
Vane actuating mechanism having a laterally mounted actuating lever Nov 28, 2017 Issued
Array ( [id] => 14376323 [patent_doc_number] => 20190162074 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-05-30 [patent_title] => ROTATABLE COMPONENT FOR TURBOMACHINES, INCLUDING A NON-AXISYMMETRIC OVERHANGING PORTION [patent_app_type] => utility [patent_app_number] => 15/824151 [patent_app_country] => US [patent_app_date] => 2017-11-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7274 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 124 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15824151 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/824151
Rotatable component for turbomachines, including a non-axisymmetric overhanging portion Nov 27, 2017 Issued
Array ( [id] => 16697407 [patent_doc_number] => 10947993 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-03-16 [patent_title] => Thermal gradient attenuation structure to mitigate rotor bow in turbine engine [patent_app_type] => utility [patent_app_number] => 15/822507 [patent_app_country] => US [patent_app_date] => 2017-11-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 10 [patent_no_of_words] => 4899 [patent_no_of_claims] => 18 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 190 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15822507 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/822507
Thermal gradient attenuation structure to mitigate rotor bow in turbine engine Nov 26, 2017 Issued
Array ( [id] => 12752173 [patent_doc_number] => 20180142558 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-05-24 [patent_title] => TURBOMACHINE BLADE SYSTEM [patent_app_type] => utility [patent_app_number] => 15/818053 [patent_app_country] => US [patent_app_date] => 2017-11-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2971 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 68 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15818053 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/818053
TURBOMACHINE BLADE SYSTEM Nov 19, 2017 Abandoned
Array ( [id] => 16843544 [patent_doc_number] => 11015618 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2021-05-25 [patent_title] => Centrifugal compressor [patent_app_type] => utility [patent_app_number] => 16/330873 [patent_app_country] => US [patent_app_date] => 2017-11-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 5 [patent_no_of_words] => 6266 [patent_no_of_claims] => 13 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 153 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16330873 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/330873
Centrifugal compressor Nov 15, 2017 Issued
Array ( [id] => 14809371 [patent_doc_number] => 20190271295 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-05 [patent_title] => WIND TURBINE NOISE ANALYSIS AND CONTROL [patent_app_type] => utility [patent_app_number] => 16/349239 [patent_app_country] => US [patent_app_date] => 2017-11-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8820 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [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] => 16349239 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/349239
Wind turbine noise analysis and control Nov 12, 2017 Issued
Array ( [id] => 12771586 [patent_doc_number] => 20180149030 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-05-31 [patent_title] => TURBINE SHROUD WITH HANGER ATTACHMENT [patent_app_type] => utility [patent_app_number] => 15/803332 [patent_app_country] => US [patent_app_date] => 2017-11-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7098 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 15803332 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/803332
TURBINE SHROUD WITH HANGER ATTACHMENT Nov 2, 2017 Abandoned
Array ( [id] => 17953960 [patent_doc_number] => 11480057 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-10-25 [patent_title] => Airfoil cooling circuit [patent_app_type] => utility [patent_app_number] => 15/791745 [patent_app_country] => US [patent_app_date] => 2017-10-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 5 [patent_no_of_words] => 4865 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 310 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15791745 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/791745
Airfoil cooling circuit Oct 23, 2017 Issued
Array ( [id] => 17421894 [patent_doc_number] => 11255340 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-02-22 [patent_title] => Impeller attachment method [patent_app_type] => utility [patent_app_number] => 15/723899 [patent_app_country] => US [patent_app_date] => 2017-10-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 2664 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 171 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15723899 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/723899
Impeller attachment method Oct 2, 2017 Issued
Array ( [id] => 12608412 [patent_doc_number] => 20180094634 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-04-05 [patent_title] => FAN APPARATUS [patent_app_type] => utility [patent_app_number] => 15/715615 [patent_app_country] => US [patent_app_date] => 2017-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3691 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -1 [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] => 15715615 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/715615
FAN APPARATUS Sep 25, 2017 Abandoned
Menu