Prosecution Insights
Last updated: October 02, 2026

Celanese Eva Performance Polymers LLC

Technology area: Biotechnology & Pharmaceuticals

7 pending office actions • 5 art units • 6 examiners • 0 of 7 (0%) have an AI response strategy ready • 2 patents granted in the last 365 days

Analysis

Celanese Eva Performance Polymers LLC shows a distributed prosecution profile with 6 pending office actions. These matters are spread across 5 distinct examiners and 5 distinct art units, all within the Biotechnology & Pharmaceuticals technology area. This distribution indicates that while the technology focus is consistent, the company is interacting with a variety of personnel across multiple specialized units.

The busiest examiner for this portfolio is BARBER, KIMBERLY, who currently handles 2 pending office actions. This represents a higher concentration of work compared to the other distinct examiners who share the remaining workload. The fact that 6 pending office actions are split among 5 distinct art units suggests that the patent applications may cover diverse sub-specialties within the broader biotechnology field.

For patent practitioners, the presence of 5 distinct examiners means that prosecution strategies must be tailored to multiple individual styles and art unit preferences. Although BARBER, KIMBERLY is the busiest examiner with 2 pending office actions, the overall portfolio remains relatively decentralized. Monitoring the outcomes across these 5 distinct art units will be essential for maintaining consistency in the company's intellectual property protections.

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

Portfolio Summary

7
Total Pending OAs
3
Non-Final OAs
4
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.

1
Hard (14%)
6
Medium (86%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only3 (43%)
Double-patenting + other3 (43%)
Multi-statute (no §101)1 (14%)

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
1
Mechanical / Eng
14% 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.

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
BARBER, KIMBERLY 2 73.6% +18.5%
LIPPERT, JOHN WILLIAM 1 58.2% +40.0%
BASQUILL, SEAN M 1 38.8% +21.7%
PRAGANI, RAJAN 1 53.3% +70.0%
WISTNER, SARAH CLINKSCALES 1 25.0% +81.0%
ZAMORY, JUSTIN L 1 72.9% +17.4%

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
18171406 Intravaginal Ring Device for the Delivery of Aromatase Inhibitor BASQUILL, SEAN M 17d overdue
17948277 Refillable Implantable Device for Delivering a Drug Compound WISTNER, SARAH CLINKSCALES —

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
18157134 Method for Prohibiting and/or Treating an Eye Condition BARBER, KIMBERLY 26d overdue
18171406 Intravaginal Ring Device for the Delivery of Aromatase Inhibitor BASQUILL, SEAN M 17d overdue
18474292 Implantable Medical Device for the Delivery of a Nucleic Acid BARBER, KIMBERLY —
18332826 Monolithic Implantable Device for Sustained Release of an Antibody LIPPERT, JOHN WILLIAM —
18157123 Implantable Device for Delivery of a Tyrosine Kinase Inhibitor PRAGANI, RAJAN —
17948277 Refillable Implantable Device for Delivering a Drug Compound WISTNER, SARAH CLINKSCALES —
17948271 Refillable Implantable Device for Delivering a Drug Compound ZAMORY, JUSTIN L —

Top Art Units

Art UnitApps
1615 2
1614 2
1637 1
1616 1
3783 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18474292 Implantable Medical Device for the Delivery of a Nucleic Acid BARBER, KIMBERLY 1637 §103§112DP Non-Final OA — Pending Sep 26, 2023
18332826 Monolithic Implantable Device for Sustained Release of an Antibody LIPPERT, JOHN WILLIAM 1615 §103 Non-Final OA — Pending Jun 12, 2023
18171406 Intravaginal Ring Device for the Delivery of Aromatase Inhibitor BASQUILL, SEAN M 1614 §103§112 Final Rejection 17d overdue Pending Feb 20, 2023
18157134 Method for Prohibiting and/or Treating an Eye Condition BARBER, KIMBERLY 1615 §103 Final Rejection 26d overdue Pending Jan 20, 2023
18157123 Implantable Device for Delivery of a Tyrosine Kinase Inhibitor PRAGANI, RAJAN 1614 §103§112DP Final Rejection — Pending Jan 20, 2023
17948277 Refillable Implantable Device for Delivering a Drug Compound WISTNER, SARAH CLINKSCALES 1616 §103DP Non-Final OA — Pending Sep 20, 2022
17948271 Refillable Implantable Device for Delivering a Drug Compound ZAMORY, JUSTIN L 3783 §103Other Final Rejection — Pending Sep 20, 2022

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