Prosecution Insights
Last updated: October 25, 2026

Liangdan Sun

Technology area: Biotechnology & Pharmaceuticals

2 pending office actions • 2 art units • 2 examiners • 0 of 2 (0%) have an AI response strategy ready

Analysis

Liangdan Sun is currently navigating the patent prosecution process in the Biotechnology & Pharmaceuticals technology area. The portfolio has 2 pending office actions. These actions are distributed across 2 distinct examiners and 2 distinct art units, indicating a more diversified prosecution landscape than portfolios with a single pending matter.

The busiest examiner for this portfolio is HAVLIN, ROBERT H, who is managing 1 pending office action. This means that the 2 pending office actions are split among multiple officials. The involvement of 2 distinct art units suggests that the technology may span different sub-sectors within the Biotechnology & Pharmaceuticals field, requiring varied technical expertise from the patent office.

With 2 distinct examiners, there is an opportunity to observe different examination styles. However, since the busiest examiner pending count is 1, no single examiner dominates the current workload. The prosecution strategy must account for the standards of multiple art units, which provides a broader base of interaction with the patent office than a single-unit portfolio, allowing for a more comparative analysis of procedural tendencies.

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

Portfolio Summary

2
Total Pending OAs
0
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.

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

2
Hard (100%)
0
Medium (0%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other1 (50%)
Multi-statute (no §101)1 (50%)

Industry Mix

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

2
Life Sciences
100% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% 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.

20 h
Manual time on pending OAs
4 h
Time saved (low, 20%)
7 h
Time saved (mid, 35%)
0.2 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
HAVLIN, ROBERT H 1 51.3% +28.3%
STRIEGEL, THEODORE CHARLES 1 21.9% +23.6%

Hard Cases (2)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 2 ordered by deadline are shown.

App #TitleExaminerDue in
18081983 APPLICATION OF ADRB1 ACTIVE INHIBITOR IN PREPARING PREPARATION OR AS PREPARATION FOR TREATING PSORIASIS HAVLIN, ROBERT H 78d
17564737 EVALUATION SYSTEM FOR EVALUATING PSORIASIS AND USE THEREOF STRIEGEL, THEODORE CHARLES —

Interview Candidates (2)

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 2 ordered by deadline are shown.

App #TitleExaminerDue in
18081983 APPLICATION OF ADRB1 ACTIVE INHIBITOR IN PREPARING PREPARATION OR AS PREPARATION FOR TREATING PSORIASIS HAVLIN, ROBERT H 78d
17564737 EVALUATION SYSTEM FOR EVALUATING PSORIASIS AND USE THEREOF STRIEGEL, THEODORE CHARLES —

Top Art Units

Art UnitApps
1626 1
1685 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18081983 APPLICATION OF ADRB1 ACTIVE INHIBITOR IN PREPARING PREPARATION OR AS PREPARATION FOR TREATING PSORIASIS HAVLIN, ROBERT H 1626 §103§112 Final Rejection 78d Pending Dec 15, 2022
17564737 EVALUATION SYSTEM FOR EVALUATING PSORIASIS AND USE THEREOF STRIEGEL, THEODORE CHARLES 1685 §101§112 Final Rejection — Pending Dec 29, 2021

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Frequently Asked Questions

How many pending USPTO office actions does Liangdan Sun have?

Liangdan Sun has 2 pending office actions as of October 2026, spread across 2 art units and 2 examiners.

Which USPTO examiner handles the most Liangdan Sun applications?

Robert H Havlin has the most, with 1 of Liangdan Sun's pending office actions.

What technology area are Liangdan Sun's patent applications in?

Mostly Biotechnology & Pharmaceuticals (USPTO Tech Center 1600), based on where its pending office actions are examined.

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