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] => 20586090 [patent_doc_number] => 20260071682 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-03-12 [patent_title] => SWIVEL SEAL ASSEMBLY AND ALIGNMENT METHOD [patent_app_type] => utility [patent_app_number] => 19/320564 [patent_app_country] => US [patent_app_date] => 2025-09-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -1 [patent_words_short_claim] => 301 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19320564 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/320564
SWIVEL SEAL ASSEMBLY AND ALIGNMENT METHOD Sep 4, 2025 Pending
Array ( [id] => 20408145 [patent_doc_number] => 20250377254 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-12-11 [patent_title] => SEALING UNIT FOR INSPECTING WATERPROOFNESS OF HALF-FINISHED PRODUCT [patent_app_type] => utility [patent_app_number] => 19/309234 [patent_app_country] => US [patent_app_date] => 2025-08-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -2 [patent_words_short_claim] => 110 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19309234 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/309234
SEALING UNIT FOR INSPECTING WATERPROOFNESS OF HALF-FINISHED PRODUCT Aug 24, 2025 Pending
Array ( [id] => 20499457 [patent_doc_number] => 20260028915 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-29 [patent_title] => Sealing device, turbomachine, and use [patent_app_type] => utility [patent_app_number] => 19/305837 [patent_app_country] => US [patent_app_date] => 2025-08-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -14 [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] => 19305837 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/305837
Sealing device, turbomachine, and use Aug 20, 2025 Pending
Array ( [id] => 20379443 [patent_doc_number] => 20250361936 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-11-27 [patent_title] => SELECTIVELY DENSIFIED MEMBRANE SEALANT AND PROCESS FOR MAKING SAME [patent_app_type] => utility [patent_app_number] => 19/292026 [patent_app_country] => US [patent_app_date] => 2025-08-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 8421 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -34 [patent_words_short_claim] => 118 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19292026 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/292026
SELECTIVELY DENSIFIED MEMBRANE SEALANT AND PROCESS FOR MAKING SAME Aug 5, 2025 Pending
Array ( [id] => 20364799 [patent_doc_number] => 20250354611 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-11-20 [patent_title] => 3D SEAL ASSEMBLY [patent_app_type] => utility [patent_app_number] => 19/291518 [patent_app_country] => US [patent_app_date] => 2025-08-05 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 121 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19291518 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/291518
3D SEAL ASSEMBLY Aug 4, 2025 Pending
Array ( [id] => 20280341 [patent_doc_number] => 20250305583 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-02 [patent_title] => COMPOSITE SEAL FOR A MOTOR VEHICLE [patent_app_type] => utility [patent_app_number] => 19/081496 [patent_app_country] => US [patent_app_date] => 2025-03-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 81 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19081496 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/081496
COMPOSITE SEAL FOR A MOTOR VEHICLE Mar 16, 2025 Pending
Array ( [id] => 20041898 [patent_doc_number] => 20250180120 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-05 [patent_title] => ARRANGEMENTS FOR PROVIDING A SUBSTANTIALLY FLUID-TIGHT SEAL [patent_app_type] => utility [patent_app_number] => 19/050522 [patent_app_country] => US [patent_app_date] => 2025-02-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3335 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -10 [patent_words_short_claim] => 109 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19050522 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/050522
ARRANGEMENTS FOR PROVIDING A SUBSTANTIALLY FLUID-TIGHT SEAL Feb 10, 2025 Pending
Array ( [id] => 20041798 [patent_doc_number] => 20250180020 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-05 [patent_title] => Mechanical Seal Assembly with Double-Sealing Properties and Low Pressure Area [patent_app_type] => utility [patent_app_number] => 19/007815 [patent_app_country] => US [patent_app_date] => 2025-01-02 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -6 [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] => 19007815 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/007815
Mechanical Seal Assembly with Double-Sealing Properties and Low Pressure Area Jan 1, 2025 Abandoned
Array ( [id] => 20473869 [patent_doc_number] => 20260016088 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2026-01-15 [patent_title] => SEALING RING ASSEMBLY STRUCTURE AND ELECTRONIC DEVICE [patent_app_type] => utility [patent_app_number] => 19/006244 [patent_app_country] => US [patent_app_date] => 2024-12-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -9 [patent_words_short_claim] => 152 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19006244 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/006244
SEALING RING ASSEMBLY STRUCTURE AND ELECTRONIC DEVICE Dec 30, 2024 Pending
Array ( [id] => 20295676 [patent_doc_number] => 20250320919 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-16 [patent_title] => PISTON RING WITH TRAPEZOIDAL OPENING [patent_app_type] => utility [patent_app_number] => 18/988853 [patent_app_country] => US [patent_app_date] => 2024-12-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [patent_words_short_claim] => 140 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18988853 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/988853
PISTON RING WITH TRAPEZOIDAL OPENING Dec 18, 2024 Pending
Array ( [id] => 20068785 [patent_doc_number] => 20250207007 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-26 [patent_title] => SEALING MEMBER AND METHOD FOR MANUFACTURING THE SAME [patent_app_type] => utility [patent_app_number] => 18/984776 [patent_app_country] => US [patent_app_date] => 2024-12-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3177 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -12 [patent_words_short_claim] => 43 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18984776 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/984776
SEALING MEMBER AND METHOD FOR MANUFACTURING THE SAME Dec 16, 2024 Pending
Array ( [id] => 20041704 [patent_doc_number] => 20250179926 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-06-05 [patent_title] => SEALING RING [patent_app_type] => utility [patent_app_number] => 18/961524 [patent_app_country] => US [patent_app_date] => 2024-11-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 158 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18961524 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/961524
SEALING RING Nov 26, 2024 Pending
Array ( [id] => 19833077 [patent_doc_number] => 20250084863 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-03-13 [patent_title] => HIGH PRESSURE GAS SEALING [patent_app_type] => utility [patent_app_number] => 18/955061 [patent_app_country] => US [patent_app_date] => 2024-11-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4619 [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] => 18955061 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/955061
HIGH PRESSURE GAS SEALING Nov 20, 2024 Pending
Array ( [id] => 19746661 [patent_doc_number] => 20250035226 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-01-30 [patent_title] => Plurality of Studs being Friction Welded to an Exterior Surface of a Storage Tank having a Block Patch and a Member between the Exterior Surface and the Studs [patent_app_type] => utility [patent_app_number] => 18/912582 [patent_app_country] => US [patent_app_date] => 2024-10-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 17014 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 73 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18912582 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/912582
Plurality of Studs being Friction Welded to an Exterior Surface of a Storage Tank having a Block Patch and a Member between the Exterior Surface and the Studs Oct 10, 2024 Pending
Array ( [id] => 19724813 [patent_doc_number] => 20250027564 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-01-23 [patent_title] => PISTON RING [patent_app_type] => utility [patent_app_number] => 18/910903 [patent_app_country] => US [patent_app_date] => 2024-10-09 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 2749 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 79 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18910903 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/910903
PISTON RING Oct 8, 2024 Pending
Array ( [id] => 19710071 [patent_doc_number] => 20250020213 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-01-16 [patent_title] => SEALING SYSTEM [patent_app_type] => utility [patent_app_number] => 18/899035 [patent_app_country] => US [patent_app_date] => 2024-09-27 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 1792 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -4 [patent_words_short_claim] => 111 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18899035 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/899035
SEALING SYSTEM Sep 26, 2024 Pending
Array ( [id] => 19877538 [patent_doc_number] => 20250109795 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-04-03 [patent_title] => MULTILAYER GASKET AND METHODS OF FORMING THE SAME [patent_app_type] => utility [patent_app_number] => 18/897039 [patent_app_country] => US [patent_app_date] => 2024-09-26 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 19511 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 42 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18897039 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/897039
MULTILAYER GASKET AND METHODS OF FORMING THE SAME Sep 25, 2024 Pending
Array ( [id] => 20467262 [patent_doc_number] => 12523297 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2026-01-13 [patent_title] => Method and apparatus for the hermetic sealing of martensitic metals for precompression for cryogenic applications [patent_app_type] => utility [patent_app_number] => 18/884811 [patent_app_country] => US [patent_app_date] => 2024-09-13 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 14 [patent_no_of_words] => 3514 [patent_no_of_claims] => 41 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 140 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18884811 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/884811
Method and apparatus for the hermetic sealing of martensitic metals for precompression for cryogenic applications Sep 12, 2024 Issued
Array ( [id] => 19718020 [patent_doc_number] => 12203549 [patent_country] => US [patent_kind] => B1 [patent_issue_date] => 2025-01-21 [patent_title] => Method of interfacing nonspecific conduits between thermally insulated gaseous environments [patent_app_type] => utility [patent_app_number] => 18/800073 [patent_app_country] => US [patent_app_date] => 2024-08-11 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 9 [patent_figures_cnt] => 20 [patent_no_of_words] => 3273 [patent_no_of_claims] => 24 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 100 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18800073 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/800073
Method of interfacing nonspecific conduits between thermally insulated gaseous environments Aug 10, 2024 Issued
Array ( [id] => 20202155 [patent_doc_number] => 12404931 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-09-02 [patent_title] => Dual ring stuffing box [patent_app_type] => utility [patent_app_number] => 18/775355 [patent_app_country] => US [patent_app_date] => 2024-07-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 14 [patent_figures_cnt] => 14 [patent_no_of_words] => 3573 [patent_no_of_claims] => 20 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 86 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18775355 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/775355
Dual ring stuffing box Jul 16, 2024 Issued
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