Prosecution Insights
Last updated: October 04, 2026

Sigilon Therapeutics Inc.

Technology area: Biotechnology & Pharmaceuticals

7 pending office actions • 5 art units • 6 examiners • 0 of 7 (0%) have an AI response strategy ready • 6 patents granted in the last 365 days

Analysis

Sigilon Therapeutics Inc. is managing 6 pending office actions within the Biotechnology & Pharmaceuticals technology area. These actions are distributed among 5 distinct examiners and 4 distinct art units. This spread suggests that the company's intellectual property covers several different sub-sectors within the biotech field, requiring a strategy that accounts for various examination styles. The presence of 4 distinct art units indicates that the portfolio is being reviewed across multiple specialized groups at the patent office.

STEVENS, MARK V is the busiest examiner for this portfolio, currently handling 2 pending office actions. This makes STEVENS, MARK V the examiner managing the highest number of actions for the company, as the remaining 4 actions are split among the other 4 examiners. This concentration suggests that this specific examiner's perspective will be particularly influential for these pending biotechnology matters. Practitioners should focus on the specific preferences of STEVENS, MARK V while also maintaining distinct approaches for the other 4 examiners involved in the prosecution of these 6 actions.

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

Portfolio Summary

7
Total Pending OAs
5
Non-Final OAs
2
Final Rejections
0
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.

2
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.

3
Hard (43%)
4
Medium (57%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only2 (29%)
Double-patenting + other2 (29%)
Multi-statute (no §101)3 (43%)

Industry Mix

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

6
Life Sciences
86% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
0
Mechanical / Eng
0% of docket
1
Business / Other
14% 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.

70 h
Manual time on pending OAs
14 h
Time saved (low, 20%)
24 h
Time saved (mid, 35%)
0.6 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
STEVENS, MARK V 2 65.5% +41.6%
NATARAJAN, MEERA 1 62.5% +18.0%
CANELLA, KAREN A 1 62.2% +32.8%
CHANDRAKUMAR, NIZAL S 1 72.7% +18.3%
WILSON, MICHAEL C 1 41.5% +17.9%
WEIDNER, ADAM M 1 63.5% +33.8%

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
17598154 COMPOSITIONS, DEVICES, AND METHODS FOR FACTOR VII THERAPY WILSON, MICHAEL C 215d overdue
18274125 COMPOSITIONS, DEVICES AND METHODS FOR INDUCING ANTIGEN-SPECIFIC IMMUNE TOLERANCE STEVENS, MARK V —
18274123 COMPOSITIONS, DEVICES AND METHODS FOR TREATING IMMUNE-MEDIATED INFLAMMATORY DISEASES CANELLA, KAREN A —

Interview Candidates (7)

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 7 ordered by deadline are shown.

App #TitleExaminerDue in
17598154 COMPOSITIONS, DEVICES, AND METHODS FOR FACTOR VII THERAPY WILSON, MICHAEL C 215d overdue
17784972 COMPOUNDS, POLYMERS, DEVICES, AND USES THEREOF CHANDRAKUMAR, NIZAL S 29d overdue
18705759 COMPOSITIONS FOR CELL-BASED THERAPIES AND RELATED METHODS NATARAJAN, MEERA —
18274125 COMPOSITIONS, DEVICES AND METHODS FOR INDUCING ANTIGEN-SPECIFIC IMMUNE TOLERANCE STEVENS, MARK V —
18274123 COMPOSITIONS, DEVICES AND METHODS FOR TREATING IMMUNE-MEDIATED INFLAMMATORY DISEASES CANELLA, KAREN A —
18019664 HETEROARYL AND HETEROCYCLYL COMPOUNDS STEVENS, MARK V —
16651892 METHODS, COMPOSITIONS, AND IMPLANTABLE ELEMENTS COMPRISING ACTIVE CELLS WEIDNER, ADAM M —

Top Art Units

Art UnitApps
1613 2
1643 1
1625 1
1638 1
1675 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18705759 COMPOSITIONS FOR CELL-BASED THERAPIES AND RELATED METHODS NATARAJAN, MEERA — §103 Non-Final OA — Pending Apr 29, 2024
18274125 COMPOSITIONS, DEVICES AND METHODS FOR INDUCING ANTIGEN-SPECIFIC IMMUNE TOLERANCE STEVENS, MARK V 1613 §103§112 Non-Final OA — Pending Jul 25, 2023
18274123 COMPOSITIONS, DEVICES AND METHODS FOR TREATING IMMUNE-MEDIATED INFLAMMATORY DISEASES CANELLA, KAREN A 1643 §103§112 Non-Final OA — Pending Jul 25, 2023
18019664 HETEROARYL AND HETEROCYCLYL COMPOUNDS STEVENS, MARK V 1613 §102§103§112DP Non-Final OA — Pending Feb 03, 2023
17784972 COMPOUNDS, POLYMERS, DEVICES, AND USES THEREOF CHANDRAKUMAR, NIZAL S 1625 §103DP Final Rejection 29d overdue Pending Jun 13, 2022
17598154 COMPOSITIONS, DEVICES, AND METHODS FOR FACTOR VII THERAPY WILSON, MICHAEL C 1638 §103§112 Non-Final OA 215d overdue Pending Sep 24, 2021
16651892 METHODS, COMPOSITIONS, AND IMPLANTABLE ELEMENTS COMPRISING ACTIVE CELLS WEIDNER, ADAM M 1675 §103Other Final Rejection — Pending Mar 27, 2020

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