Prosecution Insights
Last updated: October 25, 2026

L&F Co. Ltd.

Technology area: Chemistry & Materials

5 pending office actions • 4 art units • 5 examiners • 0 of 5 (0%) have an AI response strategy ready • 2 patents granted in the last 365 days

Analysis

L&F Co. Ltd. is managing 5 pending office actions in the Chemistry & Materials technology area. These actions are distributed among 5 distinct examiners, ensuring that no single examiner is handling more than one of the company's active cases. This one-to-one ratio between actions and examiners provides a broad range of perspectives across the pending portfolio, which can help mitigate the impact of any single examiner's strictness. For the practitioner, this ensures that the company's success is not tied to the decision-making of a single individual.

The workload is spread across 5 distinct art units. CARLSON, KOURTNEY SALZMAN is the busiest examiner with 1 pending office action, representing a balanced distribution of the workload across the assigned staff and technical divisions. This structure indicates that the company's current research and development efforts are technically diverse, requiring interactions with five different specialized groups within the patent office to advance its 5 pending matters. This lack of concentration across art units suggests a broad technical scope for the company's current innovation, requiring a flexible approach to prosecution that accounts for the different standards of five separate technical divisions.

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

Portfolio Summary

5
Total Pending OAs
3
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
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 (40%)
3
Medium (60%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only3 (60%)
Multi-statute (no §101)2 (40%)

Industry Mix

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

5
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.

50 h
Manual time on pending OAs
10 h
Time saved (low, 20%)
18 h
Time saved (mid, 35%)
0.4 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
CARLSON, KOURTNEY SALZMAN 1 44.8% +40.2%
DUMBRIS, SETH M 1 76.4% +16.7%
LEE, DANIEL H. 1 70.7% +25.1%
RUTISER, CLAIRE A 1 41.9% +22.8%
GARCIA, BETHANY CLAIRE 1 66.7% +34.5%

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
18693601 CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY CARLSON, KOURTNEY SALZMAN —
18575922 MATERIAL FOR ACTIVE MATERIAL KILN AND KILN INCLUDING SAME DUMBRIS, SETH M —

Interview Candidates (5)

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 5 ordered by deadline are shown.

App #TitleExaminerDue in
17765963 NOVEL LITHIUM-METAL OXIDE COMPOSITE, AND LITHIUM SECONDARY BATTERY COMPRISING SAME RUTISER, CLAIRE A 7d
18693601 CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY CARLSON, KOURTNEY SALZMAN —
18575922 MATERIAL FOR ACTIVE MATERIAL KILN AND KILN INCLUDING SAME DUMBRIS, SETH M —
18563984 POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY LEE, DANIEL H. —
17620190 POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY GARCIA, BETHANY CLAIRE —

Top Art Units

Art UnitApps
1721 2
1784 1
1746 1
1751 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18693601 CATHODE ACTIVE MATERIAL FOR SECONDARY BATTERY CARLSON, KOURTNEY SALZMAN 1721 §103§112 Non-Final OA — Pending Apr 15, 2024
18575922 MATERIAL FOR ACTIVE MATERIAL KILN AND KILN INCLUDING SAME DUMBRIS, SETH M 1784 §102§103 Final Rejection — Pending Feb 13, 2024
18563984 POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY LEE, DANIEL H. 1746 §103 Non-Final OA — Pending Jan 23, 2024
17765963 NOVEL LITHIUM-METAL OXIDE COMPOSITE, AND LITHIUM SECONDARY BATTERY COMPRISING SAME RUTISER, CLAIRE A 1751 §103 Final Rejection 7d Pending May 19, 2022
17620190 POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY GARCIA, BETHANY CLAIRE 1721 §103 Non-Final OA — Pending Apr 29, 2022

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Frequently Asked Questions

How many pending USPTO office actions does L&F Co. Ltd. have?

L&F Co. Ltd. has 5 pending office actions as of October 2026, spread across 4 art units and 5 examiners.

Which USPTO examiner handles the most L&F Co. Ltd. applications?

Kourtney Salzman Carlson has the most, with 1 of L&F Co. Ltd.'s pending office actions.

What technology area are L&F Co. Ltd.'s patent applications in?

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

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