Prosecution Insights
Last updated: October 01, 2026

Equistar Chemicals L.P.

Technology area: Chemistry & Materials

8 pending office actions • 3 art units • 4 examiners • 0 of 8 (0%) have an AI response strategy ready • 1 patents granted in the last 365 days

Analysis

Equistar Chemicals L.P. maintains a portfolio with 8 pending office actions in the Chemistry & Materials technology area. These matters are distributed among 4 distinct examiners and 3 distinct art units. This volume of activity indicates a robust and active prosecution phase for the company's chemical and material innovations. The use of 3 distinct art units suggests that the company's filings cover a variety of technical sub-specialties within the broader Chemistry & Materials field.

The busiest examiner for the portfolio is RIETH, STEPHEN EDWARD, who is currently managing 4 of the 8 pending office actions. This concentration means that half of the company's pending actions are under the review of a single individual, making the relationship with RIETH, STEPHEN EDWARD a critical factor in the portfolio's overall success. The remaining actions are split among the other 3 distinct examiners, requiring the company to balance a high-volume relationship with one examiner against the varied requirements of several others. With 4 distinct examiners and 3 distinct art units, the company faces a complex prosecution landscape that demands both consistency in its primary relationship and adaptability across multiple administrative groups.

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

Portfolio Summary

8
Total Pending OAs
7
Non-Final OAs
1
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 4 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

0
Overdue
0
Due this week
4
Due this month
0
Due in next 60 days
0
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 4 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Due ≤ 30 days (4)

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.

7
Hard (88%)
1
Medium (12%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§102 only1 (12%)
Multi-statute (no §101)7 (88%)

Industry Mix

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

7
Life Sciences
88% 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
12% 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.

80 h
Manual time on pending OAs
16 h
Time saved (low, 20%)
28 h
Time saved (mid, 35%)
0.7 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
RIETH, STEPHEN EDWARD 4 45.8% +32.9%
COPENHEAVER, BLAINE R 2 85.5% +18.4%
LEE, RIP A 1 83.5% -4.2%
FISCHER, JUSTIN R 1 44.3% +2.3%

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
18627073 BLENDS OF POST CONUMER RESINS AND POLYETHYLENE FOR QUALITY BLOWN FILM LEE, RIP A —

Hard Cases (7)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 7 ordered by deadline are shown.

App #TitleExaminerDue in
17845727 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845673 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845759 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845636 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
18637014 HDPE BLENDS OF VIRGIN POLYETHYLENE AND POST CONSUMER RECYCLATE FOR BLOWN FILMS AND METHODS THEREOF COPENHEAVER, BLAINE R —
18595783 COMPATIBILIZATION AND IMPACT MODIFICATION OF POST CONSUMER RESINS FISCHER, JUSTIN R —
18142398 POLYOLEFIN COMPOSITIONS AND PRODUCTS COPENHEAVER, BLAINE R —

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
17845727 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845673 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845759 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
17845636 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 20d
18637014 HDPE BLENDS OF VIRGIN POLYETHYLENE AND POST CONSUMER RECYCLATE FOR BLOWN FILMS AND METHODS THEREOF COPENHEAVER, BLAINE R —
18142398 POLYOLEFIN COMPOSITIONS AND PRODUCTS COPENHEAVER, BLAINE R —

Top Art Units

Art UnitApps
1759 4
1781 2
1787 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18637014 HDPE BLENDS OF VIRGIN POLYETHYLENE AND POST CONSUMER RECYCLATE FOR BLOWN FILMS AND METHODS THEREOF COPENHEAVER, BLAINE R 1781 §102§103§112Other Non-Final OA — Pending Apr 16, 2024
18627073 BLENDS OF POST CONUMER RESINS AND POLYETHYLENE FOR QUALITY BLOWN FILM LEE, RIP A 1787 §102 Non-Final OA — Pending Apr 04, 2024
18595783 COMPATIBILIZATION AND IMPACT MODIFICATION OF POST CONSUMER RESINS FISCHER, JUSTIN R — §102§103Other Non-Final OA — Pending Mar 05, 2024
18142398 POLYOLEFIN COMPOSITIONS AND PRODUCTS COPENHEAVER, BLAINE R 1781 §103§112 Final Rejection — Pending May 02, 2023
17845727 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 1759 §102§103Other Non-Final OA 20d Pending Jun 21, 2022
17845673 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 1759 §102§103Other Non-Final OA 20d Pending Jun 21, 2022
17845759 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 1759 §102§103Other Non-Final OA 20d Pending Jun 21, 2022
17845636 POLYMER RECYCLATE PROCESSES AND PRODUCTS RIETH, STEPHEN EDWARD 1759 §102§103Other Non-Final OA 20d Pending Jun 21, 2022

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