Prosecution Insights
Last updated: October 26, 2026

Enphase Energy Inc.

Technology areas: Chemistry & Materials • Semiconductors, Circuits & Optics

9 pending office actions • 7 art units • 9 examiners • 0 of 9 (0%) have an AI response strategy ready • 11 patents granted in the last 365 days

Analysis

Enphase Energy Inc. has 8 pending office actions in Chemistry & Materials. The actions are assigned to 8 distinct examiners across 6 distinct art units, creating a distributed prosecution profile with limited concentration in any one examiner. The technical grouping is broader than a single art-unit strategy can address.

POUDEL, SANTOSH RAJ is the busiest examiner, with 1 pending matter. Counsel should coordinate claim terminology and technical disclosure positions across the portfolio, while using separate claim charts for each examination setting. Portfolio management should also distinguish recurring chemistry issues from grounds that arise only from a particular art-unit assignment.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Portfolio Summary

9
Total Pending OAs
4
Non-Final OAs
4
Final Rejections
1
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 2 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

1
Overdue
1
Due this week
0
Due this month
0
Due in next 60 days
0
Due later

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.

5
Hard (56%)
4
Medium (44%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other3 (33%)
§103 only4 (44%)
Multi-statute (no §101)2 (22%)

Industry Mix

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

3
Life Sciences
33% of docket
1
Information Tech
11% of docket
0
Communications
0% of docket
5
Semiconductors
56% of docket
0
Mechanical / Eng
0% of docket
0
Business / Other
0% 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.

90 h
Manual time on pending OAs
18 h
Time saved (low, 20%)
31 h
Time saved (mid, 35%)
0.8 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
SHIAO, DAVID A 1 75.5% +30.9%
POUDEL, SANTOSH RAJ 1 76.5% +32.2%
GEISS, BRIAN BUTLER 1 69.9% +27.5%
LEONARD, MICHELLE TURNER 1 69.6% +9.9%
ZHOU, ZIXUAN 1 76.5% +18.1%
RIDLEY, BASIA ANNA 1 13.5% +1.7%
NIMOX, RAYMOND LONDALE 1 70.2% +10.4%
CHENG, VIVIAN S 1 — —
KESSIE, DANIEL 1 62.1% +24.3%

Hard Cases (6)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 6 ordered by deadline are shown.

App #TitleExaminerDue in
18196213 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM NIMOX, RAYMOND LONDALE 6d
19475305 METHODS AND APPARATUS FOR USE WITH ELECTRIC VEHICLES SHIAO, DAVID A —
18794224 SYSTEM ESTIMATOR WITH LOAD OPERATION SCHEDULING FOR AN ENERGY GENERATION AND/OR STORAGE SYSTEM POUDEL, SANTOSH RAJ —
18623274 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM GEISS, BRIAN BUTLER —
18377346 CHASSIS CONFIGURED FOR USE WITH PRISMATIC BATTERY CELLS RIDLEY, BASIA ANNA —
18196061 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM CHENG, VIVIAN S —

Interview Candidates (6)

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 6 ordered by deadline are shown.

App #TitleExaminerDue in
18125296 METHOD AND APPARATUS FOR MANAGING DISTRIBUTED ENERGY RESOURCES KESSIE, DANIEL 30d overdue
18196213 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM NIMOX, RAYMOND LONDALE 6d
19475305 METHODS AND APPARATUS FOR USE WITH ELECTRIC VEHICLES SHIAO, DAVID A —
18794224 SYSTEM ESTIMATOR WITH LOAD OPERATION SCHEDULING FOR AN ENERGY GENERATION AND/OR STORAGE SYSTEM POUDEL, SANTOSH RAJ —
18623274 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM GEISS, BRIAN BUTLER —
18379246 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM ZHOU, ZIXUAN —

Top Art Units

Art UnitApps
2836 2
2857 2
2115 1
1724 1
2859 1
1725 1
1781 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19475305 METHODS AND APPARATUS FOR USE WITH ELECTRIC VEHICLES SHIAO, DAVID A 2836 §102§103§112 Non-Final OA — Pending Oct 14, 2025
18794224 SYSTEM ESTIMATOR WITH LOAD OPERATION SCHEDULING FOR AN ENERGY GENERATION AND/OR STORAGE SYSTEM POUDEL, SANTOSH RAJ 2115 §101§102§103§112 Final Rejection — Pending Aug 05, 2024
18623274 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM GEISS, BRIAN BUTLER 2857 §101§103 Non-Final OA — Pending Apr 01, 2024
18388948 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM LEONARD, MICHELLE TURNER 1724 §103 Final Rejection — Pending Nov 13, 2023
18379246 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM ZHOU, ZIXUAN 2859 §103 Non-Final OA — Pending Oct 12, 2023
18377346 CHASSIS CONFIGURED FOR USE WITH PRISMATIC BATTERY CELLS RIDLEY, BASIA ANNA 1725 §103 Non-Final OA — Pending Oct 06, 2023
18196213 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM NIMOX, RAYMOND LONDALE 2857 §101§103 Non-Final OA 6d Pending May 11, 2023
18196061 STORAGE SYSTEM CONFIGURED FOR USE WITH AN ENERGY MANAGEMENT SYSTEM CHENG, VIVIAN S 1781 §103§112 Final Rejection — Pending May 11, 2023
18125296 METHOD AND APPARATUS FOR MANAGING DISTRIBUTED ENERGY RESOURCES KESSIE, DANIEL 2836 §103 Final Rejection 30d overdue Pending Mar 23, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Enphase Energy Inc. have?

Enphase Energy Inc. has 9 pending office actions as of October 2026, spread across 7 art units and 9 examiners.

Which USPTO examiner handles the most Enphase Energy Inc. applications?

David A Shiao has the most, with 1 of Enphase Energy Inc.'s pending office actions.

What technology area are Enphase Energy Inc.'s patent applications in?

Mostly Semiconductors, Circuits & Optics (USPTO Tech Center 2800), based on where its pending office actions are examined.

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