Prosecution Insights
Last updated: April 19, 2026

Hitachi Energy Ltd.

30 pending office actions

Portfolio Summary

30
Total Pending OAs
10
Final Rejections
20
Non-Final OAs

Pending Office Actions

App #TitleExaminerArt UnitStatusFiled
19129690 COOLING ARRANGEMENT AND METHOD FOR COOLING AT LEAST ONE OIL-TO-AIR EXTERNAL HEAT EXCHANGER ALVARE, PAUL 3763 Non-Final OA May 14, 2025
18881996 POWER SEMICONDUCTOR DEVICE HAVING GATE ELECTRODE COVERS AT MOST A PORTION OF THE DRIFT REGION MAI, ANH D 2893 Non-Final OA Jan 07, 2025
18862004 SYSTEM COMPRISING A TRANSFORMER MCDONNOUGH, COURTNEY G 2858 Final Rejection Oct 31, 2024
18715113 POWER CONTROL OF A POWER CONVERTER BASED ON MIXED TYPES OF POWER CONVERTERS TORRES-RIVERA, ALEX 2838 Non-Final OA May 30, 2024
18682799 HIGH VOLTAGE GAS INSULATED SWITCHGEAR, HV GIS, FOR SINGLE OR THREE PHASE OPERATION HOFFBERG, ROBERT JOSEPH 2835 Final Rejection Feb 09, 2024
18289849 METHOD FOR PRODUCING A SILICON CARBIDE SUBSTRATE CRAWFORD EASON, LATANYA N 2813 Non-Final OA Nov 07, 2023
18556242 METHOD OF CONTROLLING A POWER CONVERTER, CONVERTER ARRANGEMENT AND COMPUTER PROGRAM PRODUCT NOVAK, PETER MICHAEL 2838 Final Rejection Oct 19, 2023
18283897 POWER SEMICONDUCTOR MODULE COMPRISING SWITCH ELEMENTS AND DIODES KEBEDE, BROOK 2818 Non-Final OA Sep 25, 2023
18470157 Condition-Based Method for Malfunction Prediction BACA, MATTHEW WALTER 2857 Non-Final OA Sep 19, 2023
18280049 GATE-COMMUTED THYRISTOR CELL WITH A BASE REGION HAVING A VARYING THICKNESS GONDARENKO, NATALIA A 2891 Final Rejection Sep 01, 2023
18240304 POWER SEMICONDUCTOR DEVICE BOATMAN, CASEY PAUL 2893 Non-Final OA Aug 30, 2023
18276237 POWER SEMICONDUCTOR MODULE, POWER SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING A POWER SEMICONDUCTOR DEVICE HOFFBERG, ROBERT JOSEPH 2835 Final Rejection Aug 07, 2023
18268133 SWITCHGEAR ASSEMBLY ALONZO MILLER, RHADAMES J 2847 Final Rejection Jun 16, 2023
18038752 TRANSFORMER WITH AIR-FLOW RE-DIRECTOR LIAN, MANG TIN BIK 2837 Non-Final OA May 25, 2023
18023376 PARALLEL ISOLATING DC/DC CONVERTER SYSTEM BARNIE, REXFORD N 2836 Non-Final OA Feb 26, 2023
18022191 TIE PLATE FOR A TRANSFORMER CORE ASSEMBLY WHITTINGTON, KENNETH 3992 Final Rejection Feb 20, 2023
18020708 A TAP CHANGER AND A TRANSFORMER ARRANGEMENT COMPRISING THE TAP CHANGER BARNES, MALCOLM 2837 Non-Final OA Feb 10, 2023
18018152 WINDING ARRANGEMENT, TRANSFORMER AND METHOD FOR PRODUCING A WINDING ARRANGEMENT NGUYEN, TUYEN T 2837 Non-Final OA Jan 26, 2023
18015755 TRANSFORMER CORE AND TRANSFORMER WEST, AISLIN MARIE 2837 Non-Final OA Jan 12, 2023
17928289 HYBRID TRANSFORMER CORE AND METHOD OF MANUFACTURING A TRANSFORMER CORE LIAN, MANG TIN BIK 2837 Final Rejection Nov 29, 2022
17918779 TRANSFORMER AND MANUFACTURING METHOD LIAN, MANG TIN BIK 2837 Final Rejection Oct 13, 2022
17784659 POWER ELECTRONICS ON-LOAD TAP CHANGER WITH A REDUCED NUMBER OF TAPS LAXTON, GARY L 2838 Final Rejection Jun 12, 2022
17762064 WINDING CONFIGURATION AS PART OF AN INTEGRATED STRUCTURE FOR A MEDIUM FREQUENCY TRANSFORMER CAZAN, LIVIUS RADU 3729 Non-Final OA Mar 20, 2022
17640364 TRANSFORMER FRAME STRUCTURE NGUYEN, TUYEN T 2837 Non-Final OA Mar 04, 2022
17634767 A NON-LIQUID IMMERSED TRANSFORMER NGUYEN, TUYEN T 2837 Non-Final OA Feb 11, 2022
17631458 METHOD AND CONDUCTOR STRUCTURE FOR MANUFACTURING AN ELECTRIC WINDING OF AN ELECTROMAGNETIC INDUCTION APPARATUS HINSON, RONALD 2837 Non-Final OA Jan 29, 2022
17624218 ELECTROMAGNETIC INDUCTION DEVICE WITH ON-LOAD TAP CHANGER LEE, JYE-JUNE 2838 Non-Final OA Dec 30, 2021
17623215 RESONATOR ARRAY SENSOR ARRANGEMENT BARNIE, REXFORD N 2836 Non-Final OA Dec 27, 2021
17430317 ARRANGEMENT COMPRISING A VOLTAGE DISTRIBUTION LINE AND CONSUMERS LAUGHLIN, NATHAN L 2119 Non-Final OA Aug 11, 2021
15988407 METHOD AND SYSTEM FOR CONTROLLING COOLING SYSTEM OF POWER EQUIPMENT ABBASZADEH, JAWEED A 2176 Non-Final OA May 24, 2018

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