Search

Charles S. Chang

Examiner (ID: 13161, Phone: (571)270-5024 , Office: P/2871 )

Most Active Art Unit
2871
Art Unit(s)
2883, 2871, 2881
Total Applications
1206
Issued Applications
920
Pending Applications
63
Abandoned Applications
244

Applications

Application numberTitle of the applicationFiling DateStatus
Array ( [id] => 20179896 [patent_doc_number] => 20250263854 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-08-21 [patent_title] => Separators for Gaseous Products in Oxocarbon Electrolyzers [patent_app_type] => utility [patent_app_number] => 19/054351 [patent_app_country] => US [patent_app_date] => 2025-02-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 12082 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -24 [patent_words_short_claim] => 61 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 19054351 [rel_patent_id] =>[rel_patent_doc_number] =>)
19/054351
Separators for gaseous products in oxocarbon electrolyzers Feb 13, 2025 Issued
Array ( [id] => 19785975 [patent_doc_number] => 20250059654 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-02-20 [patent_title] => SYSTEM FOR STERILIZING EQUIPMENT, ASSOCIATED METHOD, AND CHLORINE DIOXIDE GAS GENERATING DEVICE FOR USE WITH SAME [patent_app_type] => utility [patent_app_number] => 18/915728 [patent_app_country] => US [patent_app_date] => 2024-10-15 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 15589 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -26 [patent_words_short_claim] => 149 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18915728 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/915728
System for sterilizing equipment, associated method, and chlorine dioxide gas generating device for use with same Oct 14, 2024 Issued
Array ( [id] => 19890697 [patent_doc_number] => 20250116009 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-04-10 [patent_title] => Electrochemical Reduction System and Methods of Operation Thereof [patent_app_type] => utility [patent_app_number] => 18/899116 [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] => 4927 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -13 [patent_words_short_claim] => 72 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18899116 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/899116
Electrochemical Reduction System and Methods of Operation Thereof Sep 26, 2024 Pending
Array ( [id] => 19817135 [patent_doc_number] => 20250075342 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-03-06 [patent_title] => ELECTROLYSIS APPARATUS AND METHOD FOR PRODUCING USEFUL COMPOUNDS FROM CO2 [patent_app_type] => utility [patent_app_number] => 18/820083 [patent_app_country] => US [patent_app_date] => 2024-08-29 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 12432 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -11 [patent_words_short_claim] => 67 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18820083 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/820083
ELECTROLYSIS APPARATUS AND METHOD FOR PRODUCING USEFUL COMPOUNDS FROM CO2 Aug 28, 2024 Pending
Array ( [id] => 19556996 [patent_doc_number] => 20240368788 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-11-07 [patent_title] => ORE DISSOLUTION AND IRON CONVERSION SYSTEM [patent_app_type] => utility [patent_app_number] => 18/758256 [patent_app_country] => US [patent_app_date] => 2024-06-28 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 52469 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -23 [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] => 18758256 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/758256
Ore dissolution and iron conversion system Jun 27, 2024 Issued
Array ( [id] => 19498010 [patent_doc_number] => 20240337028 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-10-10 [patent_title] => PROCESS AND SYSTEM FOR PRODUCING GLUCOSE [patent_app_type] => utility [patent_app_number] => 18/746602 [patent_app_country] => US [patent_app_date] => 2024-06-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 5412 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [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] => 18746602 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/746602
PROCESS AND SYSTEM FOR PRODUCING GLUCOSE Jun 17, 2024 Pending
Array ( [id] => 19433318 [patent_doc_number] => 20240301816 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-09-12 [patent_title] => Electrolysis System Having In Situ Enhancement Gas Storage [patent_app_type] => utility [patent_app_number] => 18/668152 [patent_app_country] => US [patent_app_date] => 2024-05-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 27649 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 83 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18668152 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/668152
Electrolysis System Having In Situ Enhancement Gas Storage May 17, 2024 Pending
Array ( [id] => 19449671 [patent_doc_number] => 20240309801 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-09-19 [patent_title] => Explosion Safe Electrolysis Unit [patent_app_type] => utility [patent_app_number] => 18/667615 [patent_app_country] => US [patent_app_date] => 2024-05-17 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 62798 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 138 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18667615 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/667615
Explosion Safe Electrolysis Unit May 16, 2024 Pending
Array ( [id] => 19871549 [patent_doc_number] => 12264398 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-04-01 [patent_title] => Solid oxide electrolyzer system including air bypass [patent_app_type] => utility [patent_app_number] => 18/654771 [patent_app_country] => US [patent_app_date] => 2024-05-03 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 4 [patent_figures_cnt] => 7 [patent_no_of_words] => 5189 [patent_no_of_claims] => 10 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 81 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18654771 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/654771
Solid oxide electrolyzer system including air bypass May 2, 2024 Issued
Array ( [id] => 20187819 [patent_doc_number] => 12398927 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-08-26 [patent_title] => Anionic electrochemical compressor and refrigeration system employing same [patent_app_type] => utility [patent_app_number] => 18/615905 [patent_app_country] => US [patent_app_date] => 2024-03-25 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 12 [patent_figures_cnt] => 15 [patent_no_of_words] => 1080 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 21 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18615905 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/615905
Anionic electrochemical compressor and refrigeration system employing same Mar 24, 2024 Issued
Array ( [id] => 19543531 [patent_doc_number] => 20240360567 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-10-31 [patent_title] => SEAWATER ELECTROLYSIS ENABLES MG(OH)2 PRODUCTION AND CO2 MINERALIZATION [patent_app_type] => utility [patent_app_number] => 18/592870 [patent_app_country] => US [patent_app_date] => 2024-03-01 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 4186 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -23 [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] => 18592870 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/592870
Seawater electrolysis enables Mg(OH) Feb 29, 2024 Issued
Array ( [id] => 20121949 [patent_doc_number] => 20250236980 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-07-24 [patent_title] => REDOX FLOW LITHIUM EXTRACTION SYSTEMS AND METHODS OF USE THEREOF [patent_app_type] => utility [patent_app_number] => 18/418024 [patent_app_country] => US [patent_app_date] => 2024-01-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 10223 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -23 [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] => 18418024 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/418024
REDOX FLOW LITHIUM EXTRACTION SYSTEMS AND METHODS OF USE THEREOF Jan 18, 2024 Abandoned
Array ( [id] => 19580130 [patent_doc_number] => 12146230 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2024-11-19 [patent_title] => Chlorine dioxide gas generating device and associated dispensing container [patent_app_type] => utility [patent_app_number] => 18/411478 [patent_app_country] => US [patent_app_date] => 2024-01-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 13 [patent_figures_cnt] => 15 [patent_no_of_words] => 10250 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 5 [patent_words_short_claim] => 239 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18411478 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/411478
Chlorine dioxide gas generating device and associated dispensing container Jan 11, 2024 Issued
Array ( [id] => 20437718 [patent_doc_number] => 12508542 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-12-30 [patent_title] => Method and system for electrochemically compressing gaseous hydrogen [patent_app_type] => utility [patent_app_number] => 18/392311 [patent_app_country] => US [patent_app_date] => 2023-12-21 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 2 [patent_figures_cnt] => 2 [patent_no_of_words] => 5513 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 2 [patent_words_short_claim] => 126 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18392311 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/392311
Method and system for electrochemically compressing gaseous hydrogen Dec 20, 2023 Issued
Array ( [id] => 20144349 [patent_doc_number] => 12378680 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-08-05 [patent_title] => Systems and methods for forming nitrogen-based compounds [patent_app_type] => utility [patent_app_number] => 18/543181 [patent_app_country] => US [patent_app_date] => 2023-12-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 8 [patent_figures_cnt] => 8 [patent_no_of_words] => 2374 [patent_no_of_claims] => 17 [patent_no_of_ind_claims] => 3 [patent_words_short_claim] => 52 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18543181 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/543181
Systems and methods for forming nitrogen-based compounds Dec 17, 2023 Issued
Array ( [id] => 19318798 [patent_doc_number] => 20240240341 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-07-18 [patent_title] => MATERIAL COMPONENTS PROTECTION AGAINST THE CORROSIVE ACTION CRYOLITE MELTS IN ALUMINIUM REDUCTION CELLS [patent_app_type] => utility [patent_app_number] => 18/536959 [patent_app_country] => US [patent_app_date] => 2023-12-12 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 19446 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 99 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18536959 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/536959
Material components protection against the corrosive action cryolite melts in aluminium reduction cells Dec 11, 2023 Issued
Array ( [id] => 19543534 [patent_doc_number] => 20240360570 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-10-31 [patent_title] => SYSTEM FOR MANAGING FUEL GENERATION [patent_app_type] => utility [patent_app_number] => 18/532655 [patent_app_country] => US [patent_app_date] => 2023-12-07 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 13438 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 27 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18532655 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/532655
SYSTEM FOR MANAGING FUEL GENERATION Dec 6, 2023 Abandoned
Array ( [id] => 19249221 [patent_doc_number] => 20240200208 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-06-20 [patent_title] => CO2 PURIFICATION AND REDUCTION SYSTEMS [patent_app_type] => utility [patent_app_number] => 18/509058 [patent_app_country] => US [patent_app_date] => 2023-11-14 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 24060 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -38 [patent_words_short_claim] => 175 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18509058 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/509058
CO2 PURIFICATION AND REDUCTION SYSTEMS Nov 13, 2023 Abandoned
Array ( [id] => 20173315 [patent_doc_number] => 12392049 [patent_country] => US [patent_kind] => B2 [patent_issue_date] => 2025-08-19 [patent_title] => Controlling plating electrolyte concentration on an electrochemical plating apparatus [patent_app_type] => utility [patent_app_number] => 18/502409 [patent_app_country] => US [patent_app_date] => 2023-11-06 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 18 [patent_figures_cnt] => 30 [patent_no_of_words] => 7948 [patent_no_of_claims] => 19 [patent_no_of_ind_claims] => 4 [patent_words_short_claim] => 311 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18502409 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/502409
Controlling plating electrolyte concentration on an electrochemical plating apparatus Nov 5, 2023 Issued
Array ( [id] => 19188263 [patent_doc_number] => 20240167176 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2024-05-23 [patent_title] => STIRRING-FREE SCALABLE ELECTROSYNTHESIS ENABLED BY ALTERNATING CURRENT [patent_app_type] => utility [patent_app_number] => 18/489882 [patent_app_country] => US [patent_app_date] => 2023-10-19 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 3701 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -18 [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] => 18489882 [rel_patent_id] =>[rel_patent_doc_number] =>)
18/489882
STIRRING-FREE SCALABLE ELECTROSYNTHESIS ENABLED BY ALTERNATING CURRENT Oct 18, 2023 Pending
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