Prosecution Insights
Last updated: October 04, 2026

Littelfuse Inc.

Technology areas: Semiconductors, Circuits & Optics • Medical Devices & Mechanical Engineering

9 pending office actions • 5 art units • 9 examiners • 0 of 9 (0%) have an AI response strategy ready • 20 patents granted in the last 365 days

Portfolio Summary

9
Total Pending OAs
7
Non-Final OAs
2
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 1 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

1
Overdue
0
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
§103 only3 (33%)
§102 only1 (11%)
Multi-statute (no §101)5 (56%)

Industry Mix

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

0
Life Sciences
0% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
4
Semiconductors
44% of docket
1
Mechanical / Eng
11% of docket
4
Business / Other
44% 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
TRAN, NGUYEN 1 83.6% +7.5%
THOMAS, LUCY M 1 62.4% +17.9%
AL-TAWEEL, MUAAMAR QAHTAN 1 80.6% +19.7%
SUL, STEPHEN SANGJIN 1 80.4% +26.1%
ABRAHAM, JOSE K 1 83.2% +32.9%
STUESSY, NOLAN GABRIEL 1 — —
LAM, TUAN THIEU 1 77.7% +13.0%
KEBEDE, BROOK 1 88.8% +4.6%
HUNTER, JOHN S 1 82.9% +22.7%

Quick Wins (4)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 4 ordered by deadline are shown.

App #TitleExaminerDue in
19073148 PROTECTION AND SENSING SYSTEMS AND METHODS TRAN, NGUYEN 2d overdue
18954952 RAPID REACTION PTC CIRCUIT PROTECTION DEVICE AL-TAWEEL, MUAAMAR QAHTAN —
18741960 ULTRA-THIN WELDABLE FUSE ABRAHAM, JOSE K —
18429723 METAL CONNECTOR IN SEMICONDUCTOR DEVICE PACKAGE KEBEDE, BROOK —

Hard Cases (5)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 5 ordered by deadline are shown.

App #TitleExaminerDue in
19034013 MULTI-CHANNEL TRIGGER SENSOR FOR PYROTECHNIC FUSES THOMAS, LUCY M —
18930138 CHIP FUSE WITH FLOATING LEADS SUL, STEPHEN SANGJIN —
18664744 DIRECT LIQUID COOLING OF SEMICONDUCTOR DEVICES STUESSY, NOLAN GABRIEL —
18442322 ISOLATION DEVICE HAVING INDUCTIVE AND CAPACITIVE ISOLATION CIRCUIT LAM, TUAN THIEU —
17800799 PPTC HEATER AND MATERIAL HAVING STABLE POWER AND SELF-LIMITING BEHAVIOR HUNTER, JOHN 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
19034013 MULTI-CHANNEL TRIGGER SENSOR FOR PYROTECHNIC FUSES THOMAS, LUCY M —
18954952 RAPID REACTION PTC CIRCUIT PROTECTION DEVICE AL-TAWEEL, MUAAMAR QAHTAN —
18930138 CHIP FUSE WITH FLOATING LEADS SUL, STEPHEN SANGJIN —
18741960 ULTRA-THIN WELDABLE FUSE ABRAHAM, JOSE K —
18442322 ISOLATION DEVICE HAVING INDUCTIVE AND CAPACITIVE ISOLATION CIRCUIT LAM, TUAN THIEU —
17800799 PPTC HEATER AND MATERIAL HAVING STABLE POWER AND SELF-LIMITING BEHAVIOR HUNTER, JOHN S —

Top Art Units

Art UnitApps
2838 1
2835 1
2843 1
2818 1
3700 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19073148 PROTECTION AND SENSING SYSTEMS AND METHODS TRAN, NGUYEN 2838 §103 Final Rejection 2d overdue Pending Mar 07, 2025
19034013 MULTI-CHANNEL TRIGGER SENSOR FOR PYROTECHNIC FUSES THOMAS, LUCY M — §102§103§112 Non-Final OA — Pending Jan 22, 2025
18954952 RAPID REACTION PTC CIRCUIT PROTECTION DEVICE AL-TAWEEL, MUAAMAR QAHTAN — §103 Non-Final OA — Pending Nov 21, 2024
18930138 CHIP FUSE WITH FLOATING LEADS SUL, STEPHEN SANGJIN — §102§103 Non-Final OA — Pending Oct 29, 2024
18741960 ULTRA-THIN WELDABLE FUSE ABRAHAM, JOSE K 2835 §103 Non-Final OA — Pending Jun 13, 2024
18664744 DIRECT LIQUID COOLING OF SEMICONDUCTOR DEVICES STUESSY, NOLAN GABRIEL — §102§103§112 Non-Final OA — Pending May 15, 2024
18442322 ISOLATION DEVICE HAVING INDUCTIVE AND CAPACITIVE ISOLATION CIRCUIT LAM, TUAN THIEU 2843 §102§103 Non-Final OA — Pending Feb 15, 2024
18429723 METAL CONNECTOR IN SEMICONDUCTOR DEVICE PACKAGE KEBEDE, BROOK 2818 §102 Non-Final OA — Pending Feb 01, 2024
17800799 PPTC HEATER AND MATERIAL HAVING STABLE POWER AND SELF-LIMITING BEHAVIOR HUNTER, JOHN S 3700 §102§103§112 Final Rejection — Pending Aug 18, 2022

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