Prosecution Insights
Last updated: October 25, 2026

Toyo Kohan Co., Ltd.

Technology area: Chemistry & Materials

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

Analysis

Toyo Kohan Co., Ltd. is currently managing 6 pending office actions within the Chemistry & Materials technology area. These 6 actions are distributed across 6 distinct examiners and 6 distinct art units. This one-to-one ratio between actions, examiners, and art units indicates a highly diversified prosecution strategy where no two pending matters are being handled by the same person or within the same technical group. This can lead to a variety of prosecution outcomes and timelines.

The busiest examiner for this portfolio is CHRISTY, KATHERINE A, who is responsible for 1 pending office action. Because there are 6 pending office actions and 6 distinct examiners, no single examiner holds a majority of the workload. Similarly, the presence of 6 distinct art units for 6 actions shows that the company's current chemistry-related filings are spread across a wide range of specialized departments, rather than being concentrated in one specific area of materials science.

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

Portfolio Summary

6
Total Pending OAs
4
Non-Final OAs
1
Final Rejections
1
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 3 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

2
Overdue
0
Due this week
1
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. 3 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (2)Due ≤ 30 days (1)

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 (33%)
4
Medium (67%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only3 (50%)
Double-patenting + other1 (17%)
Multi-statute (no §101)2 (33%)

Industry Mix

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

6
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.

60 h
Manual time on pending OAs
12 h
Time saved (low, 20%)
21 h
Time saved (mid, 35%)
0.5 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
CHRISTY, KATHERINE A 1 75.4% +34.2%
TRAN, DAN NGUYEN 1 — —
PARK, LISA S 1 77.6% +22.1%
JONES, OLIVIA ANN 1 58.6% +52.3%
CORNO JR, JAMES ANTHONY JOHN 1 38.1% +35.2%
WEYDEMEYER, ETHAN 1 44.2% +43.7%

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
17045918 LAMINATED ELECTROLYTIC FOIL WEYDEMEYER, ETHAN 30d overdue
18687992 SURFACE-TREATED METAL SHEET FOR BATTERY TRAN, DAN NGUYEN —

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
18004963 ELECTROLYTIC IRON FOIL CORNO JR, JAMES ANTHONY JOHN 77d overdue
17045918 LAMINATED ELECTROLYTIC FOIL WEYDEMEYER, ETHAN 30d overdue
18005104 ELECTROLYTIC IRON FOIL JONES, OLIVIA ANN 12d
18848999 ROLL-BONDED LAMINATE AND METHOD FOR PRODUCING THE SAME CHRISTY, KATHERINE A —
18557606 SURFACE TREATED STEEL FOIL PARK, LISA S —

Top Art Units

Art UnitApps
1784 1
1754 1
1729 1
1789 1
1722 1
1783 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18848999 ROLL-BONDED LAMINATE AND METHOD FOR PRODUCING THE SAME CHRISTY, KATHERINE A 1784 §103 Non-Final OA — Pending Sep 20, 2024
18687992 SURFACE-TREATED METAL SHEET FOR BATTERY TRAN, DAN NGUYEN 1754 §102§103§112 Non-Final OA — Pending Feb 29, 2024
18557606 SURFACE TREATED STEEL FOIL PARK, LISA S 1729 §102§103§112DP Non-Final OA — Pending Oct 27, 2023
18005104 ELECTROLYTIC IRON FOIL JONES, OLIVIA ANN 1789 §103 Non-Final OA 12d Pending Jan 11, 2023
18004963 ELECTROLYTIC IRON FOIL CORNO JR, JAMES ANTHONY JOHN 1722 §103 Non-Final OA 77d overdue Pending Jan 10, 2023
17045918 LAMINATED ELECTROLYTIC FOIL WEYDEMEYER, ETHAN 1783 §103§112 Final Rejection 30d overdue Pending Oct 07, 2020

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Frequently Asked Questions

How many pending USPTO office actions does Toyo Kohan Co., Ltd. have?

Toyo Kohan Co., Ltd. has 6 pending office actions as of October 2026, spread across 6 art units and 6 examiners.

Which USPTO examiner handles the most Toyo Kohan Co., Ltd. applications?

Katherine A Christy has the most, with 1 of Toyo Kohan Co., Ltd.'s pending office actions.

What technology area are Toyo Kohan 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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