USPTO 2015–2025 USPTO PatentsView Foreign Corporation

TOHO Kasei Co., Ltd.

USPTO PatentsView assignee record - 7 granted patents across 16 technology areas, active 2018–2024. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C08J (WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

9.6

Avg claims per patent

-25%

5-year filing velocity

The verdict

TOHO holds 7 US patents across 16 technology areas, rank #37,864 of 50,000 tracked assignees.

#37,864
of 50,000 US assignees by volume: Top 72%
by Innovation Score (28.7/100): 9.6
avg claims per patent: -25%
filing velocity, last 5 yrs

Portfolio overview

TOHO Kasei Co., Ltd. has been granted 7 US utility patents between 2018 and 2024, placing TOHO Kasei Co., Ltd. at rank #37,864 across all assignees tracked by PlainPatent. This portfolio spans 16 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.6 claims per patent with primary concentration in C08J (WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H). As a Foreign Corporation, TOHO Kasei Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, TOHO sits between TMT Tapping Measuring Technology Sàrl (7 patents, rank #37,860) and Torq/lite, Llc (7 patents, rank #37,868) - the closest US assignees by grant volume. The composite Innovation Score of 28.7/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 3 grants, compared with 4 in the 2015–2019 window, a -25% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. TOHO Kasei Co., Ltd.'s 9.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 16 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark TOHO Kasei Co., Ltd. against peers pursuing similar technology classes.

TMT Tapping Measu…

7
TOA EIYO

7
Todos Medical

7
Tog-ip

7
Tokyo GAS Living…

7
Toray Films Europe

7
Torex Semiconduct…

7
TORQ/LITE

7
TOHO Kasei ◀

7

What this shows TOHO holds 7 patents at rank #37,864, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near TOHO

By rank, the assignees closest to #37,864 in granted patent volume.

Leaders in C08J (Working-up)

Other assignees with the most granted patents in TOHO's primary technology class.

TOHO's Innovation Score vs. every tracked assignee

Composite of portfolio volume, filing velocity, technology breadth, and claim depth (0–100)

29 Top 72% higher than 28% of 50,000 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2018–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table

TOHO Kasei Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2018	2	28.6%
2019	2	28.6%
2021	2	28.6%
2024	1	14.3%

Which technologies does TOHO Kasei Co., Ltd. patent most?

C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H 4

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 3

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 2

C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 2

G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 2

H01T - SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES 2

H10N - ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR 1

B09B - DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR 1

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 1

Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT 1

H10F - INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION 1

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 1

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 1

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 1

B29B - PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS 1

Top 15 of 16 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#37,864

Across all tracked assignees

Innovation Score

28.7 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does TOHO Kasei Co., Ltd. hold?

TOHO Kasei Co., Ltd. holds 7 US granted patents filed between 2018 and 2024, spanning 16 technology areas.

What is TOHO Kasei Co., Ltd.'s Innovation Score?

TOHO Kasei Co., Ltd. has an Innovation Score of 28.7 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does TOHO Kasei Co., Ltd. focus on?

TOHO Kasei Co., Ltd.'s top technology area is C08J (WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H) with 4 patents. The company has filed patents in 16 CPC subclasses total.

Is TOHO Kasei Co., Ltd.'s patent filing rate increasing or decreasing?

TOHO Kasei Co., Ltd.'s recent filing velocity is -25% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for TOHO Kasei Co., Ltd.'s patents?

TOHO Kasei Co., Ltd.'s patents average 9.6 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the TOHO Kasei Co., Ltd. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

How to use this portfolio

TOHO's 7 grants land it in the top 72% by Innovation Score, but volume alone doesn't tell you where the strength sits.

Read that count against the largest US assignees before treating it as dominance - TOHO ranks #37,864 of 50,000. Top 50 holders
Most of this portfolio concentrates in C08J - see who else leads that technology area. C08J leaders
Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.