Prosecution Insights
Last updated: October 25, 2026

Exfo Inc.

Technology areas: Computing & Software • Communications • Semiconductors, Circuits & Optics

4 pending office actions • 4 art units • 4 examiners • 0 of 4 (0%) have an AI response strategy ready • 10 patents granted in the last 365 days

Analysis

Exfo Inc. is currently managing 4 pending office actions within the Communications technology area. Each of these 4 pending office actions is assigned to a different individual, resulting in a total of 4 distinct examiners for the portfolio. This distribution is mirrored in the departmental structure, as the portfolio also spans 4 distinct art units, ensuring that each pending matter is being reviewed by a unique technical group.

SINGH, DALZID E is listed as the busiest examiner for the company, currently responsible for 1 pending office action. Because the 4 pending office actions are spread across 4 distinct examiners and 4 distinct art units, the company must navigate 4 separate sets of examination preferences and technical interpretations. This diversity within the Communications sector means that the company's prosecution strategy must be highly individualized for each application, as there is no overlap in the personnel or art units reviewing the current workload.

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

Portfolio Summary

4
Total Pending OAs
3
Non-Final OAs
0
Final Rejections
1
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.

1
Hard (25%)
3
Medium (75%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only3 (75%)
Multi-statute (no §101)1 (25%)

Industry Mix

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

0
Life Sciences
0% of docket
1
Information Tech
25% of docket
2
Communications
50% of docket
1
Semiconductors
25% 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.

40 h
Manual time on pending OAs
8 h
Time saved (low, 20%)
14 h
Time saved (mid, 35%)
0.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
SINGH, DALZID E 1 90.9% +6.8%
LUU, THANH X 1 78.3% +10.2%
WANG, QUAN ZHEN 1 51.0% +24.9%
TAN, DAVID H 1 32.1% +16.6%

Quick Wins (1)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18969857 Systems and methods for proactively detecting faulty optical fibers using OTDR data, environmental data, and machine learning SINGH, DALZID E —

Hard Cases (1)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
18891340 PINCH DETECTION USING REAL-TIME OPTICAL TIME DOMAIN REFLECTOMETRY LUU, THANH X —

Interview Candidates (3)

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 3 ordered by deadline are shown.

App #TitleExaminerDue in
17648876 PEAK SELECTION ASSISTANCE FOR RF SPECTRUM ANALYSIS TAN, DAVID H 189d overdue
18891340 PINCH DETECTION USING REAL-TIME OPTICAL TIME DOMAIN REFLECTOMETRY LUU, THANH X —
18777215 CHROMATIC DISPERSION MEASUREMENT WANG, QUAN ZHEN —

Top Art Units

Art UnitApps
2635 1
2878 1
2685 1
2145 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18969857 Systems and methods for proactively detecting faulty optical fibers using OTDR data, environmental data, and machine learning SINGH, DALZID E 2635 §103 Non-Final OA — Pending Dec 05, 2024
18891340 PINCH DETECTION USING REAL-TIME OPTICAL TIME DOMAIN REFLECTOMETRY LUU, THANH X 2878 §102§103§112 Non-Final OA — Pending Sep 20, 2024
18777215 CHROMATIC DISPERSION MEASUREMENT WANG, QUAN ZHEN 2685 §103 Non-Final OA — Pending Jul 18, 2024
17648876 PEAK SELECTION ASSISTANCE FOR RF SPECTRUM ANALYSIS TAN, DAVID H 2145 §103 Non-Final OA 189d overdue Pending Jan 25, 2022

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Frequently Asked Questions

How many pending USPTO office actions does Exfo Inc. have?

Exfo Inc. has 4 pending office actions as of October 2026, spread across 4 art units and 4 examiners.

Which USPTO examiner handles the most Exfo Inc. applications?

Dalzid E Singh has the most, with 1 of Exfo Inc.'s pending office actions.

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

Mostly Communications (USPTO Tech Center 2600), based on where its pending office actions are examined.

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