Prosecution Insights
Last updated: October 25, 2026

Pfeifer & Langen UK Limited

Technology area: Chemistry & Materials

2 pending office actions • 2 art units • 2 examiners • 0 of 2 (0%) have an AI response strategy ready • 1 patents granted in the last 365 days

Analysis

Pfeifer & Langen UK Limited currently manages 2 pending office actions within the Chemistry & Materials technology area. This portfolio is characterized by a distributed prosecution environment, as the active cases are assigned to 2 distinct examiners across 2 distinct art units. Such a distribution suggests that the company's chemical innovations are diverse enough to fall under different technical classifications at the patent office, requiring a strategy that accounts for multiple sets of examiner expectations and art unit guidelines.

The busiest examiner for this portfolio is MERRIAM, ANDREW E, who is responsible for 1 pending office action. Given that there are 2 distinct examiners in total, the workload is split such that no single examiner dominates the prosecution of the company's current applications. For a practitioner, this means that the outcomes for the 2 pending office actions will likely be independent of one another, as they are being reviewed by different individuals in different art units. This lack of concentration requires a tailored approach for each filing to address the specific technical nuances identified by each examiner.

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

Portfolio Summary

2
Total Pending OAs
1
Non-Final OAs
1
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
1
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.

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

Rejection Statute Mix

BucketCases
Multi-statute (no §101)2 (100%)

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
MERRIAM, ANDREW E 1 28.3% +33.9%
BEKKER, KELLY JO 1 16.8% +35.1%

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
18486733 SACCHARIDE COMPOSITIONS HAVING SUCROSE-LIKE CHARACTERISTICS AND RELATED METHODS BEKKER, KELLY JO 5d
18488702 INSOLUBLE SACCHARIDE-COMPRISING COMPOSITIONS AND RELATED METHODS MERRIAM, ANDREW E —

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
18486733 SACCHARIDE COMPOSITIONS HAVING SUCROSE-LIKE CHARACTERISTICS AND RELATED METHODS BEKKER, KELLY JO 5d
18488702 INSOLUBLE SACCHARIDE-COMPRISING COMPOSITIONS AND RELATED METHODS MERRIAM, ANDREW E —

Top Art Units

Art UnitApps
1791 1
1792 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18488702 INSOLUBLE SACCHARIDE-COMPRISING COMPOSITIONS AND RELATED METHODS MERRIAM, ANDREW E 1791 §103§112 Non-Final OA — Pending Oct 17, 2023
18486733 SACCHARIDE COMPOSITIONS HAVING SUCROSE-LIKE CHARACTERISTICS AND RELATED METHODS BEKKER, KELLY JO 1792 §103§112 Final Rejection 5d Pending Oct 13, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Pfeifer & Langen UK Limited have?

Pfeifer & Langen UK Limited has 2 pending office actions as of October 2026, spread across 2 art units and 2 examiners.

Which USPTO examiner handles the most Pfeifer & Langen UK Limited applications?

Andrew E Merriam has the most, with 1 of Pfeifer & Langen UK Limited's pending office actions.

What technology area are Pfeifer & Langen UK Limited's patent applications in?

Mostly Chemistry & Materials (USPTO Tech Center 1700), based on where its pending office actions are examined.

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