
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 number | Title of the application | Filing Date | Status |
|---|---|---|---|
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 |