Search

Yean Hsi Chang

Examiner (ID: 16947)

Most Active Art Unit
2835
Art Unit(s)
2835
Total Applications
607
Issued Applications
482
Pending Applications
15
Abandoned Applications
110

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 15698391 [patent_doc_number] => 10605366 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-03-31 [patent_title] => Pressure ring [patent_app_type] => utility [patent_app_number] => 15/950744 [patent_app_country] => US [patent_app_date] => 2018-04-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 12 [patent_no_of_words] => 4147 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 108 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15950744 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/950744
Pressure ring Apr 10, 2018 Issued
Array ( [id] => 13494467 [patent_doc_number] => 20180298776 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-10-18 [patent_title] => TURBINE ABRADABLE AIR SEAL SYSTEM [patent_app_type] => utility [patent_app_number] => 15/948596 [patent_app_country] => US [patent_app_date] => 2018-04-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3779 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [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] => 15948596 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/948596
Turbine abradable air seal system Apr 8, 2018 Issued
Array ( [id] => 13480929 [patent_doc_number] => 20180292007 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-10-11 [patent_title] => PISTON RING [patent_app_type] => utility [patent_app_number] => 15/947627 [patent_app_country] => US [patent_app_date] => 2018-04-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2939 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 214 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15947627 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/947627
Piston ring Apr 5, 2018 Issued
Array ( [id] => 14964745 [patent_doc_number] => 20190309851 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-10-10 [patent_title] => BI-DIRECTIONAL SELF-ENERGIZING GASKETS [patent_app_type] => utility [patent_app_number] => 15/946896 [patent_app_country] => US [patent_app_date] => 2018-04-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2059 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 37 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15946896 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/946896
Bi-directional self-energizing gaskets Apr 5, 2018 Issued
Array ( [id] => 14931949 [patent_doc_number] => 20190301612 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-10-03 [patent_title] => VENTED LIP SEAL [patent_app_type] => utility [patent_app_number] => 15/941113 [patent_app_country] => US [patent_app_date] => 2018-03-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3123 [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] => 15941113 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/941113
VENTED LIP SEAL Mar 29, 2018 Abandoned
Array ( [id] => 14931957 [patent_doc_number] => 20190301616 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-10-03 [patent_title] => Cryogenic Ferrofluid Sealed Rotary Union [patent_app_type] => utility [patent_app_number] => 15/941096 [patent_app_country] => US [patent_app_date] => 2018-03-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5261 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 93 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15941096 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/941096
Cryogenic ferrofluid sealed rotary union Mar 29, 2018 Issued
Array ( [id] => 17421990 [patent_doc_number] => 11255437 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-02-22 [patent_title] => Sealing device [patent_app_type] => utility [patent_app_number] => 16/499007 [patent_app_country] => US [patent_app_date] => 2018-03-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 6088 [patent_no_of_claims] => 9 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 225 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16499007 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/499007
Sealing device Mar 29, 2018 Issued
Array ( [id] => 16197942 [patent_doc_number] => 10723082 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-07-28 [patent_title] => Housing assembly and method [patent_app_type] => utility [patent_app_number] => 15/920310 [patent_app_country] => US [patent_app_date] => 2018-03-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 5 [patent_no_of_words] => 6525 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 111 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15920310 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/920310
Housing assembly and method Mar 12, 2018 Issued
Array ( [id] => 14838003 [patent_doc_number] => 20190277402 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-09-12 [patent_title] => APPARATUS AND METHODS FOR ADDITIVELY MANUFACTURING O-RING GROOVES [patent_app_type] => utility [patent_app_number] => 15/919129 [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] => 3766 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 47 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15919129 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/919129
APPARATUS AND METHODS FOR ADDITIVELY MANUFACTURING O-RING GROOVES Mar 11, 2018 Abandoned
Array ( [id] => 15852081 [patent_doc_number] => 10641312 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-05-05 [patent_title] => Gasket assembly [patent_app_type] => utility [patent_app_number] => 15/917228 [patent_app_country] => US [patent_app_date] => 2018-03-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 10 [patent_no_of_words] => 6531 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 130 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15917228 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/917228
Gasket assembly Mar 8, 2018 Issued
Array ( [id] => 16177803 [patent_doc_number] => 20200224771 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-07-16 [patent_title] => BACK TO BACK BEARING SEALING SYSTEMS [patent_app_type] => utility [patent_app_number] => 16/491469 [patent_app_country] => US [patent_app_date] => 2018-03-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6505 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [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] => 16491469 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/491469
Back to back bearing sealing systems Mar 7, 2018 Issued
Array ( [id] => 15728341 [patent_doc_number] => 10612597 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-04-07 [patent_title] => Sealing apparatus [patent_app_type] => utility [patent_app_number] => 15/915720 [patent_app_country] => US [patent_app_date] => 2018-03-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 9440 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 355 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15915720 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/915720
Sealing apparatus Mar 7, 2018 Issued
Array ( [id] => 14779831 [patent_doc_number] => 20190264813 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2019-08-29 [patent_title] => WIPER SEAL SYSTEM AND METHOD [patent_app_type] => utility [patent_app_number] => 15/907851 [patent_app_country] => US [patent_app_date] => 2018-02-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4207 [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] => 15907851 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/907851
Wiper seal system and method Feb 27, 2018 Issued
Array ( [id] => 16809015 [patent_doc_number] => 20210131568 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-05-06 [patent_title] => SEALING DEVICE AND COMPRESSOR [patent_app_type] => utility [patent_app_number] => 16/487241 [patent_app_country] => US [patent_app_date] => 2018-02-22 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6196 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 303 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16487241 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/487241
Sealing device and compressor Feb 21, 2018 Issued
Array ( [id] => 12865030 [patent_doc_number] => 20180180184 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2018-06-28 [patent_title] => SEALING STRUCTURE [patent_app_type] => utility [patent_app_number] => 15/901189 [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] => 6348 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 427 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15901189 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/901189
Sealing structure Feb 20, 2018 Issued
Array ( [id] => 15347067 [patent_doc_number] => 20200011425 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-01-09 [patent_title] => SEAL DEVICE [patent_app_type] => utility [patent_app_number] => 16/483682 [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] => 3756 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -3 [patent_words_short_claim] => 52 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16483682 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/483682
SEAL DEVICE Feb 20, 2018 Abandoned
Array ( [id] => 15346901 [patent_doc_number] => 20200011342 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-01-09 [patent_title] => SEAL DEVICE [patent_app_type] => utility [patent_app_number] => 16/483655 [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] => 4024 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [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] => 16483655 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/483655
Seal device Feb 20, 2018 Issued
Array ( [id] => 15558919 [patent_doc_number] => 20200063871 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-02-27 [patent_title] => SEAL DEVICE [patent_app_type] => utility [patent_app_number] => 16/488097 [patent_app_country] => US [patent_app_date] => 2018-02-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4028 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 64 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16488097 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/488097
Seal device Feb 15, 2018 Issued
Array ( [id] => 15916509 [patent_doc_number] => 10655487 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2020-05-19 [patent_title] => Pressure balanced secondary seal [patent_app_type] => utility [patent_app_number] => 15/897748 [patent_app_country] => US [patent_app_date] => 2018-02-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 6 [patent_figures_cnt] => 6 [patent_no_of_words] => 3736 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 288 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 15897748 [rel_patent_id] =>[rel_patent_doc_number] =>)
15/897748
Pressure balanced secondary seal Feb 14, 2018 Issued
Array ( [id] => 16177102 [patent_doc_number] => 20200224070 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-07-16 [patent_title] => GAS SEAL MEMBER FOR HIGH-PRESSURE HYDROGEN DEVICE, AND HIGH-PRESSURE HYDROGEN DEVICE [patent_app_type] => utility [patent_app_number] => 16/482806 [patent_app_country] => US [patent_app_date] => 2018-02-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10973 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 66 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16482806 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/482806
Gas seal member for high-pressure hydrogen device, and high-pressure hydrogen device Feb 12, 2018 Issued
Menu