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] => 17186006 [patent_doc_number] => 20210332891 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-10-28 [patent_title] => NEGATIVE PRESSURE SUCTION SEAL OF NEGATIVE PRESSURE SUCTION ADHERING AND MOVING DEVICE [patent_app_type] => utility [patent_app_number] => 17/366147 [patent_app_country] => US [patent_app_date] => 2021-07-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5267 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 217 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17366147 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/366147
NEGATIVE PRESSURE SUCTION SEAL OF NEGATIVE PRESSURE SUCTION ADHERING AND MOVING DEVICE Jul 1, 2021 Abandoned
Array ( [id] => 20309891 [patent_doc_number] => 20250327520 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-23 [patent_title] => MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL [patent_app_type] => utility [patent_app_number] => 18/012742 [patent_app_country] => US [patent_app_date] => 2021-06-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1223 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [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] => 18012742 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/012742
MECHANICAL SEAL ASSEMBLY AND METHOD OF ASSEMBLY OF A MECHANICAL SEAL Jun 29, 2021 Pending
Array ( [id] => 17344550 [patent_doc_number] => 20220010881 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-01-13 [patent_title] => BIMETALLIC SEAL [patent_app_type] => utility [patent_app_number] => 17/364090 [patent_app_country] => US [patent_app_date] => 2021-06-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10233 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -19 [patent_words_short_claim] => 45 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17364090 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/364090
Bimetallic seal Jun 29, 2021 Issued
Array ( [id] => 18094120 [patent_doc_number] => 20220412461 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-29 [patent_title] => Stuffing Box Assembly [patent_app_type] => utility [patent_app_number] => 17/361608 [patent_app_country] => US [patent_app_date] => 2021-06-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1703 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -8 [patent_words_short_claim] => 51 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17361608 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/361608
Stuffing Box Assembly Jun 28, 2021 Abandoned
Array ( [id] => 18613214 [patent_doc_number] => 20230279950 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-09-07 [patent_title] => MECHANICAL SEAL [patent_app_type] => utility [patent_app_number] => 18/008124 [patent_app_country] => US [patent_app_date] => 2021-06-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5699 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 197 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18008124 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/008124
Mechanical seal Jun 13, 2021 Issued
Array ( [id] => 18718723 [patent_doc_number] => 11796059 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-10-24 [patent_title] => Self-centering insert and related method of use [patent_app_type] => utility [patent_app_number] => 17/341760 [patent_app_country] => US [patent_app_date] => 2021-06-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 9086 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 7 [patent_words_short_claim] => 244 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17341760 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/341760
Self-centering insert and related method of use Jun 7, 2021 Issued
Array ( [id] => 18598059 [patent_doc_number] => 20230272858 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-08-31 [patent_title] => SEALING STRUCTURE [patent_app_type] => utility [patent_app_number] => 17/923950 [patent_app_country] => US [patent_app_date] => 2021-06-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6874 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 147 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17923950 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/923950
SEALING STRUCTURE Jun 6, 2021 Abandoned
Array ( [id] => 17275404 [patent_doc_number] => 20210381602 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-12-09 [patent_title] => SEAL ASSEMBLY AND MANUFACTURING METHOD THEREOF [patent_app_type] => utility [patent_app_number] => 17/339202 [patent_app_country] => US [patent_app_date] => 2021-06-04 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2530 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 36 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17339202 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/339202
SEAL ASSEMBLY AND MANUFACTURING METHOD THEREOF Jun 3, 2021 Abandoned
Array ( [id] => 18452718 [patent_doc_number] => 20230193998 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-06-22 [patent_title] => SEALING DEVICE [patent_app_type] => utility [patent_app_number] => 17/925684 [patent_app_country] => US [patent_app_date] => 2021-06-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4389 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [patent_words_short_claim] => 378 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17925684 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/925684
Sealing device Jun 1, 2021 Issued
Array ( [id] => 18392255 [patent_doc_number] => 20230160474 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-05-25 [patent_title] => HIGH PRESSURE SEALS [patent_app_type] => utility [patent_app_number] => 17/917133 [patent_app_country] => US [patent_app_date] => 2021-05-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 6597 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 17917133 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/917133
High pressure seals May 30, 2021 Issued
Array ( [id] => 18037134 [patent_doc_number] => 20220381349 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-12-01 [patent_title] => SHAFT SEALING ARRANGEMENT [patent_app_type] => utility [patent_app_number] => 17/334718 [patent_app_country] => US [patent_app_date] => 2021-05-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2990 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [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] => 17334718 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/334718
Shaft sealing arrangement May 28, 2021 Issued
Array ( [id] => 18530765 [patent_doc_number] => 20230235836 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-07-27 [patent_title] => COMBINATION OF SPLIT PLATE AND SLEEVE, AND A SLEEVE [patent_app_type] => utility [patent_app_number] => 18/007509 [patent_app_country] => US [patent_app_date] => 2021-05-24 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4305 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 51 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18007509 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/007509
Combination of split plate and sleeve, and a sleeve May 23, 2021 Issued
Array ( [id] => 18021589 [patent_doc_number] => 20220373088 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-11-24 [patent_title] => DOOR SEAL [patent_app_type] => utility [patent_app_number] => 17/327402 [patent_app_country] => US [patent_app_date] => 2021-05-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3843 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 131 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17327402 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/327402
DOOR SEAL May 20, 2021 Abandoned
Array ( [id] => 17229398 [patent_doc_number] => 20210355954 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-11-18 [patent_title] => HIGH PRESSURE GAS SEALING [patent_app_type] => utility [patent_app_number] => 17/323198 [patent_app_country] => US [patent_app_date] => 2021-05-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4562 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -21 [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] => 17323198 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/323198
High pressure gas sealing May 17, 2021 Issued
Array ( [id] => 18203083 [patent_doc_number] => 11585471 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-02-21 [patent_title] => Seal assembly [patent_app_type] => utility [patent_app_number] => 17/320327 [patent_app_country] => US [patent_app_date] => 2021-05-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 3 [patent_figures_cnt] => 3 [patent_no_of_words] => 8572 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 136 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17320327 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/320327
Seal assembly May 13, 2021 Issued
Array ( [id] => 19884775 [patent_doc_number] => 12270474 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-04-08 [patent_title] => Mechanical seal arrangement for high temperature applications [patent_app_type] => utility [patent_app_number] => 17/923725 [patent_app_country] => US [patent_app_date] => 2021-05-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 7 [patent_figures_cnt] => 9 [patent_no_of_words] => 3981 [patent_no_of_claims] => 15 [patent_no_of_ind_claims] => 2 [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] => 17923725 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/923725
Mechanical seal arrangement for high temperature applications May 10, 2021 Issued
Array ( [id] => 17186002 [patent_doc_number] => 20210332887 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2021-10-28 [patent_title] => METHOD AND APPARATUS FOR THE HERMETIC SEALING OF MARTENSITIC METALS FOR PRECOMPRESSION FOR CRYOGENIC APPLICATIONS [patent_app_type] => utility [patent_app_number] => 17/316083 [patent_app_country] => US [patent_app_date] => 2021-05-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8112 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -66 [patent_words_short_claim] => 39 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17316083 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/316083
Method and apparatus for the hermetic sealing of martensitic metals for precompression for cryogenic applications May 9, 2021 Issued
Array ( [id] => 18437040 [patent_doc_number] => 20230184334 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2023-06-15 [patent_title] => SEAL CARTRIDGE ASSEMBLY AND METHOD FOR MOUNTING A SEAL CARTRIDGE ASSEMBLY [patent_app_type] => utility [patent_app_number] => 17/926398 [patent_app_country] => US [patent_app_date] => 2021-04-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5440 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [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] => 17926398 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/926398
Seal cartridge assembly and method for mounting a seal cartridge assembly Apr 26, 2021 Issued
Array ( [id] => 18667089 [patent_doc_number] => 11773976 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2023-10-03 [patent_title] => Cupseal for compressor and method for preparing the same [patent_app_type] => utility [patent_app_number] => 17/223218 [patent_app_country] => US [patent_app_date] => 2021-04-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 5 [patent_figures_cnt] => 9 [patent_no_of_words] => 8235 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 145 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17223218 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/223218
Cupseal for compressor and method for preparing the same Apr 5, 2021 Issued
Array ( [id] => 19702303 [patent_doc_number] => 12196320 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-01-14 [patent_title] => Sliding component [patent_app_type] => utility [patent_app_number] => 17/913153 [patent_app_country] => US [patent_app_date] => 2021-03-30 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 14 [patent_no_of_words] => 7759 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 146 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17913153 [rel_patent_id] =>[rel_patent_doc_number] =>)
17/913153
Sliding component Mar 29, 2021 Issued
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