Prosecution Insights
Last updated: May 29, 2026

Hitachi Energy Ltd.

32 pending office actions • 16 art units • 22 examiners • 0 of 32 (0%) have an AI response strategy ready • 138 patents granted in the last 365 days

Portfolio Summary

32
Total Pending OAs
14
Non-Final OAs
12
Final Rejections
6
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 32 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

12
Overdue
1
Due this week
5
Due this month
7
Due in next 60 days
7
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 32 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (12)Due ≤ 7 days (1)Due ≤ 30 days (5)Due ≤ 60 days (7)Due later (7)

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

1
Hard (3%)
26
Medium (81%)
3
Easy (9%)
2
Unknown (6%)

Rejection Statute Mix

BucketCases
§101 only1 (3%)
§103 only24 (75%)
§102 only2 (6%)
§112 only3 (9%)
No statute on record2 (6%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

1
Life Sciences
3% of docket
1
Information Tech
3% of docket
0
Communications
0% of docket
27
Semiconductors
84% of docket
2
Mechanical / Eng
6% of docket
1
Business / Other
3% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

320 h
Manual time on pending OAs
64 h
Time saved (low, 20%)
112 h
Time saved (mid, 35%)
2.8 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
NGUYEN, TUYEN T 5 81.7% +0.9%
LIAN, MANG TIN BIK 3 70.3% +26.1%
NOVAK, PETER MICHAEL 2 88.3% +8.5%
BOLTON, WILLIAM A 2 89.1% +5.7%
HOFFBERG, ROBERT JOSEPH 2 72.2% +23.6%
BARNIE, REXFORD N 2 14.0% +20.6%
ALVARE, PAUL 1 57.5% +38.3%
COMBER, KEVIN J 1 82.6% +11.6%
MAI, ANH D 1 37.6% +9.9%
JIMENEZ, ANTHONY R 1 88.2% +6.9%

Quick Wins (9)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
18577463 GAS-INSULATED HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER BOLTON, WILLIAM A 66d overdue
18691432 CHARGING OF A MODULAR MULTILEVEL CONVERTER NOVAK, PETER MICHAEL 51d overdue
17640364 TRANSFORMER FRAME STRUCTURE NGUYEN, TUYEN T 31d overdue
17766657 INSULATION ASSEMBLY, TRANSFORMER ASSEMBLY, AND DRY TYPE TRANSFORMER NGUYEN, TUYEN T 30d overdue
17634767 A NON-LIQUID IMMERSED TRANSFORMER NGUYEN, TUYEN T 4d overdue
18556242 METHOD OF CONTROLLING A POWER CONVERTER, CONVERTER ARRANGEMENT AND COMPUTER PROGRAM PRODUCT NOVAK, PETER MICHAEL 14d
18018152 WINDING ARRANGEMENT, TRANSFORMER AND METHOD FOR PRODUCING A WINDING ARRANGEMENT NGUYEN, TUYEN T 15d
19105092 PROTECTION ARRANGEMENT FOR A TRANSFORMER COMBER, KEVIN J 43d

Hard Cases (3)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 3 ordered by deadline are shown.

App #TitleExaminerDue in
17623215 RESONATOR ARRAY SENSOR ARRANGEMENT BARNIE, REXFORD N 3d overdue
18023376 PARALLEL ISOLATING DC/DC CONVERTER SYSTEM BARNIE, REXFORD N 2d overdue
18279049 POWER GRID TOPOLOGY DETERMINATION NGHIEM, MICHAEL P 84d

Interview Candidates (9)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
17623215 RESONATOR ARRAY SENSOR ARRANGEMENT BARNIE, REXFORD N 3d overdue
18023376 PARALLEL ISOLATING DC/DC CONVERTER SYSTEM BARNIE, REXFORD N 2d overdue
17918779 TRANSFORMER AND MANUFACTURING METHOD LIAN, MANG TIN BIK 2d overdue
18276237 POWER SEMICONDUCTOR MODULE, POWER SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING A POWER SEMICONDUCTOR DEVICE HOFFBERG, ROBERT JOSEPH 5d
18682799 HIGH VOLTAGE GAS INSULATED SWITCHGEAR, HV GIS, FOR SINGLE OR THREE PHASE OPERATION HOFFBERG, ROBERT JOSEPH 12d
17928289 HYBRID TRANSFORMER CORE AND METHOD OF MANUFACTURING A TRANSFORMER CORE LIAN, MANG TIN BIK 29d
19105092 PROTECTION ARRANGEMENT FOR A TRANSFORMER COMBER, KEVIN J 43d
17792721 METHOD FOR MAKING A DRY-TYPE TRANSFORMER, DRY-TYPE TRANSFORMER OBTAINED FROM SAID METHOD, AND DIELECTRIC BARRIER ARRANGEMENT FOR ELECTRICALLY ISOLATING A COIL OF A TRANSFORMER ASSEMBLY LIAN, MANG TIN BIK 56d

Top Art Units

Art UnitApps
2837 9
2838 3
2831 3
2836 3
2835 2
2814 2
3763 1
2893 1
2813 1
2847 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19129690 COOLING ARRANGEMENT AND METHOD FOR COOLING AT LEAST ONE OIL-TO-AIR EXTERNAL HEAT EXCHANGER ALVARE, PAUL 3763 §103 Final Rejection 63d Pending May 14, 2025
19105092 PROTECTION ARRANGEMENT FOR A TRANSFORMER COMBER, KEVIN J 2838 §103 Final Rejection 43d Pending Feb 20, 2025
18881996 POWER SEMICONDUCTOR DEVICE HAVING GATE ELECTRODE COVERS AT MOST A PORTION OF THE DRIFT REGION MAI, ANH D 2893 §103 Final Rejection 79d Pending Jan 07, 2025
18691432 CHARGING OF A MODULAR MULTILEVEL CONVERTER NOVAK, PETER MICHAEL 2838 §103 Non-Final OA 51d overdue Pending Mar 12, 2024
18687184 ELECTRIC APPARATUS FOR THE GENERATION, THE TRANSMISSION AND/OR THE DISTRIBUTION OF ELECTRICAL ENERGY BOLTON, WILLIAM A 2831 §103 Non-Final OA 55d Pending Feb 27, 2024
18682799 HIGH VOLTAGE GAS INSULATED SWITCHGEAR, HV GIS, FOR SINGLE OR THREE PHASE OPERATION HOFFBERG, ROBERT JOSEPH 2835 §112 Final Rejection 12d Pending Feb 09, 2024
18577463 GAS-INSULATED HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER BOLTON, WILLIAM A 2831 §103 Non-Final OA 66d overdue Pending Jan 08, 2024
18538092 Disconnector or earthing switch JIMENEZ, ANTHONY R 2831 Final Rejection 34d Pending Dec 13, 2023
18289849 METHOD FOR PRODUCING A SILICON CARBIDE SUBSTRATE CRAWFORD EASON, LATANYA N 2813 §103 Non-Final OA 9d overdue Pending Nov 07, 2023
18556242 METHOD OF CONTROLLING A POWER CONVERTER, CONVERTER ARRANGEMENT AND COMPUTER PROGRAM PRODUCT NOVAK, PETER MICHAEL 2838 §103 Final Rejection 14d Pending Oct 19, 2023
18285983 CURRENT DAMPER FOR VOLTAGE TRANSFORMER ALONZO MILLER, RHADAMES J 2847 §103 Non-Final OA 4d overdue Pending Oct 06, 2023
18283897 POWER SEMICONDUCTOR MODULE COMPRISING SWITCH ELEMENTS AND DIODES KEBEDE, BROOK 2818 §102 Non-Final OA 8d Pending Sep 25, 2023
18244175 SEMICONDUCTOR POWER MODULE AND METHOD FOR MANUFACTURING A SEMICONDUCTOR POWER MODULE FOR A SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE KIELIN, ERIK J 2814 §112 Final Rejection 55d Pending Sep 08, 2023
18279049 POWER GRID TOPOLOGY DETERMINATION NGHIEM, MICHAEL P 2857 §101 Final Rejection 84d Pending Aug 25, 2023
18276237 POWER SEMICONDUCTOR MODULE, POWER SEMICONDUCTOR DEVICE AND METHOD FOR PRODUCING A POWER SEMICONDUCTOR DEVICE HOFFBERG, ROBERT JOSEPH 2835 §103 Non-Final OA 5d Pending Aug 07, 2023
18268591 SILICON CARBIDE POWER DEVICE AND METHOD FOR MANUFACTURING THE SAME HANUMASAGAR, SHAMITA S 2814 §112 Final Rejection 61d Pending Jun 20, 2023
18023376 PARALLEL ISOLATING DC/DC CONVERTER SYSTEM BARNIE, REXFORD N 2836 §103 Non-Final OA 2d overdue Pending Feb 26, 2023
18022191 TIE PLATE FOR A TRANSFORMER CORE ASSEMBLY WHITTINGTON, KENNETH 3992 §103 Non-Final OA 85d Pending Feb 20, 2023
18021190 FLEXIBLE BAG, IN PARTICULAR AN AIRBAG FOR AN OIL EXPANSION TANK OF A TRANSFORMER, OIL EXPANSION TANK AND TRANSFORMER COMPRISING THE SAME AND METHOD FOR PRODUCING THE FLEXIBLE BAG KESSLER JR, THOMAS JOSEPH 1782 §103 Final Rejection 71d Pending Feb 14, 2023
18020708 A TAP CHANGER AND A TRANSFORMER ARRANGEMENT COMPRISING THE TAP CHANGER BARNES, MALCOLM 2837 §103 Non-Final OA 26d overdue Pending Feb 10, 2023
18018152 WINDING ARRANGEMENT, TRANSFORMER AND METHOD FOR PRODUCING A WINDING ARRANGEMENT NGUYEN, TUYEN T 2837 §102 Non-Final OA 15d Pending Jan 26, 2023
17928289 HYBRID TRANSFORMER CORE AND METHOD OF MANUFACTURING A TRANSFORMER CORE LIAN, MANG TIN BIK 2837 §103 Final Rejection 29d Pending Nov 29, 2022
17927543 Power Supporting Arrangement for a Power Grid Having at Least Three Groups of Phase Arms PARRIES, DRU M 2836 §103 Non-Final OA 54d Pending Nov 23, 2022
17918779 TRANSFORMER AND MANUFACTURING METHOD LIAN, MANG TIN BIK 2837 §103 Non-Final OA 2d overdue Pending Oct 13, 2022
17792721 METHOD FOR MAKING A DRY-TYPE TRANSFORMER, DRY-TYPE TRANSFORMER OBTAINED FROM SAID METHOD, AND DIELECTRIC BARRIER ARRANGEMENT FOR ELECTRICALLY ISOLATING A COIL OF A TRANSFORMER ASSEMBLY LIAN, MANG TIN BIK 2837 §103 Non-Final OA 56d Pending Jul 14, 2022
17766657 INSULATION ASSEMBLY, TRANSFORMER ASSEMBLY, AND DRY TYPE TRANSFORMER NGUYEN, TUYEN T 2837 §103 Non-Final OA 30d overdue Pending Apr 05, 2022
17762064 WINDING CONFIGURATION AS PART OF AN INTEGRATED STRUCTURE FOR A MEDIUM FREQUENCY TRANSFORMER CAZAN, LIVIUS RADU 3729 §103 Non-Final OA 1d overdue Pending Mar 20, 2022
17640364 TRANSFORMER FRAME STRUCTURE NGUYEN, TUYEN T 2837 §103 Non-Final OA 31d overdue Pending Mar 04, 2022
17634767 A NON-LIQUID IMMERSED TRANSFORMER NGUYEN, TUYEN T 2837 §103 Non-Final OA 4d overdue Pending Feb 11, 2022
17631514 INSULATION MEMBER NGUYEN, TUYEN T 2837 Final Rejection 70d Pending Jan 31, 2022
17623215 RESONATOR ARRAY SENSOR ARRANGEMENT BARNIE, REXFORD N 2836 §103 Non-Final OA 3d overdue Pending Dec 27, 2021
17430317 ARRANGEMENT COMPRISING A VOLTAGE DISTRIBUTION LINE AND CONSUMERS LAUGHLIN, NATHAN L 2119 §103 Non-Final OA 34d Pending Aug 11, 2021

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