Prosecution Insights
Last updated: October 26, 2026

Mitsubishi Materials Corporation

Technology area: Chemistry & Materials

19 pending office actions • 11 art units • 16 examiners • 0 of 19 (0%) have an AI response strategy ready • 25 patents granted in the last 365 days

Analysis

Mitsubishi Materials Corporation has 18 pending office actions in Chemistry & Materials. The portfolio spans 15 distinct examiners and 10 distinct art units, indicating substantial assignment breadth alongside concentration within the examination units. The action volume exceeds the examiner count, so several examiner relationships carry more than one matter.

WANG, XIAOBEI is the busiest examiner, with 3 pending matters. That examiner provides a meaningful point for reviewing recurring objections, amendments, and technical explanations. Broader portfolio management should still account for the other examiner and art unit assignments through shared drafting guidance and coordinated prior-art analysis.

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

Portfolio Summary

19
Total Pending OAs
13
Non-Final OAs
5
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.

0
Overdue
1
Due this week
2
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
Due ≤ 7 days (1)Due ≤ 30 days (2)

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.

13
Hard (68%)
6
Medium (32%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other1 (5%)
§103 only3 (16%)
§102 only1 (5%)
Double-patenting + other2 (11%)
Multi-statute (no §101)12 (63%)

Industry Mix

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

15
Life Sciences
79% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
4
Mechanical / Eng
21% 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.

190 h
Manual time on pending OAs
38 h
Time saved (low, 20%)
66 h
Time saved (mid, 35%)
1.7 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
WANG, XIAOBEI 3 65.3% +48.2%
HORGER, KIM S. 2 70.4% +20.6%
CLARE, MARK C 1 14.1% +19.9%
RAMOS, NICOLE N 1 81.5% +9.9%
RUFO, RYAN C 1 59.0% +40.8%
PLESZCZYNSKA, JOANNA 1 54.5% +27.7%
WYROUGH, PAUL CHRISTIAN ST 1 58.6% +35.2%
CARPENTER, JOSHUA S 1 51.6% +37.2%
SHAMS, NAZMUN NAHAR 1 79.8% +18.8%
FORREST, MICHAEL 1 59.6% +13.7%

Hard Cases (13)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
17911543 METHOD FOR PRODUCING LITHIUM SULFIDE CORALLO, CATRIONA MARY 9d
18276112 Li RECOVERY METHOD AND RECOVERY APPARATUS SMOOT, MORIAH SIMONE MCMIL 28d
18852378 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI —
19103615 TRANSACTION MANAGEMENT DEVICE, TRANSACTION MANAGEMENT SYSTEM, USER TERMINAL, TRANSACTION MANAGEMENT METHOD, DISPLAY CONTROL METHOD, AND PROGRAM CLARE, MARK C —
19100319 CUTTING TOOL RAMOS, NICOLE N —
18725170 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI —
18858894 SILICON MEMBER AND SILICON MEMBER PRODUCTION METHOD WANG, XIAOBEI —
18852365 SURFACE-COATED CUTTING TOOL HORGER, KIM S. —

Interview Candidates (12)

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 8 ordered by deadline are shown.

App #TitleExaminerDue in
18852378 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI —
19103615 TRANSACTION MANAGEMENT DEVICE, TRANSACTION MANAGEMENT SYSTEM, USER TERMINAL, TRANSACTION MANAGEMENT METHOD, DISPLAY CONTROL METHOD, AND PROGRAM CLARE, MARK C —
18725170 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI —
18858894 SILICON MEMBER AND SILICON MEMBER PRODUCTION METHOD WANG, XIAOBEI —
18852365 SURFACE-COATED CUTTING TOOL HORGER, KIM S. —
18851099 TURNING TOOL RUFO, RYAN C —
18848223 SURFACE-COATED CUTTING TOOL PLESZCZYNSKA, JOANNA —
18844162 METHOD FOR SEPARATING COBALT AND NICKEL WYROUGH, PAUL CHRISTIAN ST —

Top Art Units

Art UnitApps
1784 4
3722 3
1738 3
1733 2
3628 1
1783 1
1723 1
1762 1
1795 1
1734 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18852378 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI 1784 §102§103§112 Non-Final OA — Pending Apr 02, 2025
19103615 TRANSACTION MANAGEMENT DEVICE, TRANSACTION MANAGEMENT SYSTEM, USER TERMINAL, TRANSACTION MANAGEMENT METHOD, DISPLAY CONTROL METHOD, AND PROGRAM CLARE, MARK C 3628 §101§102§103§112 Non-Final OA — Pending Feb 13, 2025
19100319 CUTTING TOOL RAMOS, NICOLE N 3722 §102§103§112 Non-Final OA — Pending Jan 31, 2025
18725170 SURFACE-COATED CUTTING TOOL WANG, XIAOBEI 1784 §102§103 Non-Final OA — Pending Jan 02, 2025
18858894 SILICON MEMBER AND SILICON MEMBER PRODUCTION METHOD WANG, XIAOBEI 1784 §102§112 Non-Final OA — Pending Oct 22, 2024
18852365 SURFACE-COATED CUTTING TOOL HORGER, KIM S. 1784 §102§112 Non-Final OA — Pending Sep 27, 2024
18851099 TURNING TOOL RUFO, RYAN C 3722 §102§103§112 Non-Final OA — Pending Sep 26, 2024
18848223 SURFACE-COATED CUTTING TOOL PLESZCZYNSKA, JOANNA 1783 §103§112 Non-Final OA — Pending Sep 18, 2024
18844162 METHOD FOR SEPARATING COBALT AND NICKEL WYROUGH, PAUL CHRISTIAN ST 1723 §103 Final Rejection — Pending Sep 05, 2024
18721216 COPPER ALLOY POWDER CARPENTER, JOSHUA S 1733 §102§112 Non-Final OA — Pending Jun 18, 2024
18708917 COPPER ALLOY, PLASTIC WORKED COPPER ALLOY MATERIAL, COMPONENT FOR ELECTRONIC/ELECTRICAL DEVICES, TERMINAL, BUS BAR, LEAD FRAME AND HEAT DISSIPATION SUBSTRATE SHAMS, NAZMUN NAHAR 1738 §102§103 Non-Final OA — Pending May 09, 2024
18574457 METHOD FOR PRODUCING CARBON AND HYDROGEN, CARBON MATERIAL, REDUCING AGENT, AND METHOD FOR DECOMPOSING CARBON DIOXIDE FORREST, MICHAEL 1738 §102§103DP Non-Final OA — Pending Dec 27, 2023
18570093 HAFNIUM COMPOUND-CONTAINING SOL-GEL SOLUTION, METHOD FOR PRODUCING HAFNIUM COMPOUND-CONTAINING SOL-GEL SOLUTION, AND METHOD FOR PRODUCING HAFNIA-CONTAINING FILM NILAND, PATRICK DENNIS 1762 §102 Non-Final OA — Pending Dec 14, 2023
18284636 TITANIUM SUBSTRATE MATERIAL, ELECTRODE FOR WATER ELECTROLYSIS, AND SOLID POLYMER WATER ELECTROLYSIS DEVICE HORGER, KIM S. 1795 §103 Non-Final OA — Pending Sep 28, 2023
18283333 TURNING TOOL ADDISU, SARA 3722 §103 Final Rejection 6d Pending Sep 21, 2023
18277115 VALUABLE METAL RECOVERY METHOD AND RECOVERY APPARATUS YANG, JIE 1734 §103DP Final Rejection — Pending Aug 14, 2023
18276112 Li RECOVERY METHOD AND RECOVERY APPARATUS SMOOT, MORIAH SIMONE MCMIL 1733 §102§103§112 Final Rejection 28d Pending Aug 07, 2023
18268451 METHOD FOR RECOVERING LEAD FROM COPPER SMELTING DUST PIRO, NICHOLAS ANTHONY 1738 §103§112 Non-Final OA — Pending Jun 20, 2023
17911543 METHOD FOR PRODUCING LITHIUM SULFIDE CORALLO, CATRIONA MARY 1732 §103§112 Final Rejection 9d Pending Sep 14, 2022

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Frequently Asked Questions

How many pending USPTO office actions does Mitsubishi Materials Corporation have?

Mitsubishi Materials Corporation has 19 pending office actions as of October 2026, spread across 11 art units and 16 examiners.

Which USPTO examiner handles the most Mitsubishi Materials Corporation applications?

Xiaobei Wang has the most, with 3 of Mitsubishi Materials Corporation's pending office actions.

What technology area are Mitsubishi Materials Corporation's patent applications in?

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

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