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] => 18188253 [patent_doc_number] => 11578825 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-02-14 [patent_title] => Pipe joint seal for polymer piping [patent_app_type] => utility [patent_app_number] => 16/854238 [patent_app_country] => US [patent_app_date] => 2020-04-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 10 [patent_no_of_words] => 7499 [patent_no_of_claims] => 21 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 152 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16854238 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/854238
Pipe joint seal for polymer piping Apr 20, 2020 Issued
Array ( [id] => 17705535 [patent_doc_number] => 20220205541 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-06-30 [patent_title] => ROTARY JOINT [patent_app_type] => utility [patent_app_number] => 17/611294 [patent_app_country] => US [patent_app_date] => 2020-04-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 9090 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 289 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17611294 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/611294
Rotary joint Apr 16, 2020 Issued
Array ( [id] => 16207481 [patent_doc_number] => 20200240471 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-07-30 [patent_title] => OIL CONTROL FOR SEAL PLATES [patent_app_type] => utility [patent_app_number] => 16/850497 [patent_app_country] => US [patent_app_date] => 2020-04-16 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4698 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 132 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16850497 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/850497
Oil control for seal plates Apr 15, 2020 Issued
Array ( [id] => 16377150 [patent_doc_number] => 20200325992 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-10-15 [patent_title] => METHOD OF FORMING SEALING ELEMENTS FOR USE IN A MECHANICAL SEAL [patent_app_type] => utility [patent_app_number] => 16/844371 [patent_app_country] => US [patent_app_date] => 2020-04-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5045 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 77 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16844371 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/844371
Method of forming sealing elements for use in a mechanical seal Apr 8, 2020 Issued
Array ( [id] => 16377149 [patent_doc_number] => 20200325991 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2020-10-15 [patent_title] => SEALING COVER ELEMENT IN A MECHANICAL SEAL [patent_app_type] => utility [patent_app_number] => 16/844353 [patent_app_country] => US [patent_app_date] => 2020-04-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2766 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -7 [patent_words_short_claim] => 199 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16844353 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/844353
Sealing cover element in a mechanical seal Apr 8, 2020 Issued
Array ( [id] => 18280377 [patent_doc_number] => 20230095849 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-03-30 [patent_title] => SLIDING COMPONENT [patent_app_type] => utility [patent_app_number] => 17/908690 [patent_app_country] => US [patent_app_date] => 2020-04-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 7510 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 132 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17908690 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/908690
Sliding component Apr 6, 2020 Issued
Array ( [id] => 19242613 [patent_doc_number] => 12013039 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-06-18 [patent_title] => Compact low friction high temperature shaft seal and attachment [patent_app_type] => utility [patent_app_number] => 16/841378 [patent_app_country] => US [patent_app_date] => 2020-04-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 2814 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 137 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16841378 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/841378
Compact low friction high temperature shaft seal and attachment Apr 5, 2020 Issued
Array ( [id] => 17860530 [patent_doc_number] => 11441682 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-09-13 [patent_title] => Piston ring, reciprocating compressor, method for selecting piston ring and method for evaluating life of piston ring [patent_app_type] => utility [patent_app_number] => 16/837538 [patent_app_country] => US [patent_app_date] => 2020-04-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 4 [patent_no_of_words] => 6045 [patent_no_of_claims] => 6 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 55 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16837538 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/837538
Piston ring, reciprocating compressor, method for selecting piston ring and method for evaluating life of piston ring Mar 31, 2020 Issued
Array ( [id] => 17571789 [patent_doc_number] => 11320051 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-05-03 [patent_title] => Seal ring [patent_app_type] => utility [patent_app_number] => 16/825152 [patent_app_country] => US [patent_app_date] => 2020-03-20 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 64 [patent_figures_cnt] => 71 [patent_no_of_words] => 36681 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 265 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16825152 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/825152
Seal ring Mar 19, 2020 Issued
Array ( [id] => 17612548 [patent_doc_number] => 20220154827 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-05-19 [patent_title] => CONTROL APPARATUS AND METHOD FOR SUPPLYING PURGE GAS [patent_app_type] => utility [patent_app_number] => 17/440599 [patent_app_country] => US [patent_app_date] => 2020-03-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8680 [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] => 17440599 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/440599
CONTROL APPARATUS AND METHOD FOR SUPPLYING PURGE GAS Mar 18, 2020 Abandoned
Array ( [id] => 17673551 [patent_doc_number] => 20220186718 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-06-16 [patent_title] => Novel Fluid End Packing Assembly [patent_app_type] => utility [patent_app_number] => 17/438919 [patent_app_country] => US [patent_app_date] => 2020-03-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2654 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -16 [patent_words_short_claim] => 188 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17438919 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/438919
Fluid end packing assembly Mar 12, 2020 Issued
Array ( [id] => 17697892 [patent_doc_number] => 11371611 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2022-06-28 [patent_title] => Seal member for bearing and production method therefor [patent_app_type] => utility [patent_app_number] => 16/813015 [patent_app_country] => US [patent_app_date] => 2020-03-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4983 [patent_no_of_claims] => 8 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 132 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16813015 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/813015
Seal member for bearing and production method therefor Mar 8, 2020 Issued
Array ( [id] => 20078599 [patent_doc_number] => 12352659 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-07-08 [patent_title] => Pressure seal with built in testing system [patent_app_type] => utility [patent_app_number] => 17/434884 [patent_app_country] => US [patent_app_date] => 2020-02-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 11 [patent_figures_cnt] => 13 [patent_no_of_words] => 2293 [patent_no_of_claims] => 14 [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] =>[firstpage_image] =>[orig_patent_app_number] => 17434884 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/434884
Pressure seal with built in testing system Feb 25, 2020 Issued
Array ( [id] => 17053134 [patent_doc_number] => 20210262568 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-26 [patent_title] => Part Edge Seal Arrangement and Joining Method [patent_app_type] => utility [patent_app_number] => 16/800791 [patent_app_country] => US [patent_app_date] => 2020-02-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4657 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -28 [patent_words_short_claim] => 32 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16800791 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/800791
Part edge seal arrangement and joining method Feb 24, 2020 Issued
Array ( [id] => 17735601 [patent_doc_number] => 20220221060 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-07-14 [patent_title] => MECHANICAL FACE SEAL ASSEMBLY, IN PARTICULAR FOR HOT MEDIA, AND PUMP ASSEMBLY [patent_app_type] => utility [patent_app_number] => 17/604081 [patent_app_country] => US [patent_app_date] => 2020-02-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3555 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 191 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17604081 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/604081
Mechanical face seal assembly, in particular for hot media, and pump assembly Feb 24, 2020 Issued
Array ( [id] => 18605450 [patent_doc_number] => 11746907 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-09-05 [patent_title] => Carbon seal assembly [patent_app_type] => utility [patent_app_number] => 16/791269 [patent_app_country] => US [patent_app_date] => 2020-02-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 3 [patent_no_of_words] => 3316 [patent_no_of_claims] => 1 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 177 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16791269 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/791269
Carbon seal assembly Feb 13, 2020 Issued
Array ( [id] => 17037528 [patent_doc_number] => 20210254486 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-19 [patent_title] => CARBON SEAL ASSEMBLY [patent_app_type] => utility [patent_app_number] => 16/791324 [patent_app_country] => US [patent_app_date] => 2020-02-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4416 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -15 [patent_words_short_claim] => 44 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16791324 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/791324
Carbon seal assembly Feb 13, 2020 Issued
Array ( [id] => 17037670 [patent_doc_number] => 20210254628 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-08-19 [patent_title] => CARBON SEAL ASSEMBLY [patent_app_type] => utility [patent_app_number] => 16/791298 [patent_app_country] => US [patent_app_date] => 2020-02-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3371 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 50 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 16791298 [rel_patent_id] =>[rel_patent_doc_number] =>)
16/791298
Carbon seal assembly Feb 13, 2020 Issued
Array ( [id] => 18779762 [patent_doc_number] => 11821461 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-11-21 [patent_title] => Sliding components [patent_app_type] => utility [patent_app_number] => 17/428912 [patent_app_country] => US [patent_app_date] => 2020-02-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 13 [patent_no_of_words] => 9248 [patent_no_of_claims] => 16 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 178 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17428912 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/428912
Sliding components Feb 11, 2020 Issued
Array ( [id] => 18854675 [patent_doc_number] => 11852244 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-12-26 [patent_title] => Sliding component and method of manufacturing sliding member [patent_app_type] => utility [patent_app_number] => 17/424847 [patent_app_country] => US [patent_app_date] => 2020-01-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 15 [patent_figures_cnt] => 26 [patent_no_of_words] => 8080 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 104 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17424847 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/424847
Sliding component and method of manufacturing sliding member Jan 30, 2020 Issued
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