USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Kaneka Corporation

USPTO PatentsView assignee record - 824 granted patents across 181 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C08L (COMPOSITIONS OF MACROMOLECULAR COMPOUNDS).

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

Explore the portfolio See the ranking

824

Total patents granted

181

CPC technology areas

12.9

Avg claims per patent

-7%

5-year filing velocity

The verdict

Kaneka holds 824 US patents across 181 technology areas, rank #545 of 50,000 tracked assignees.

#545
of 50,000 US assignees by volume: Top 4%
by Innovation Score (59.6/100): 12.9
avg claims per patent: -7%
filing velocity, last 5 yrs

Portfolio overview

Kaneka Corporation has been granted 824 US utility patents between 2015 and 2025, placing Kaneka Corporation at rank #545 across all assignees tracked by PlainPatent. This portfolio spans 181 distinct Cooperative Patent Classification (CPC) subclasses, averaging 12.9 claims per patent with primary concentration in C08L (COMPOSITIONS OF MACROMOLECULAR COMPOUNDS). As a Foreign Corporation, Kaneka Corporation is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Kaneka sits between University Of Massachusetts (828 patents, rank #541) and Mitutoyo Corporation (820 patents, rank #549) - the closest US assignees by grant volume. The composite Innovation Score of 59.6/100 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 396 grants, compared with 428 in the 2015–2019 window, a -7% 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. Kaneka Corporation's 12.9 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Kaneka Corporation against peers pursuing similar technology classes.

University of Mas…

828
Shanghai United I…

825
Silicon Laborator…

825
E Ink Holdings

824
Kaneka ◀

824
Industry-academic…

823
NGK Spark PLUG

823
National Institut…

822
Mitutoyo

820

What this shows Kaneka holds 824 patents at rank #545, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Kaneka

By rank, the assignees closest to #545 in granted patent volume.

Leaders in C08L (Compositions OF Macromolecular Compounds)

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

Kaneka's Innovation Score vs. every tracked assignee

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

60 Top 4% higher than 96% 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 · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Kaneka Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	79	9.6%
2016	91	11.0%
2017	74	9.0%
2018	77	9.3%
2019	107	13.0%
2020	112	13.6%
2021	66	8.0%
2022	64	7.8%
2023	35	4.2%
2024	55	6.7%
2025	64	7.8%

Which technologies does Kaneka Corporation patent most?

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 186

C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H 131

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 128

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 123

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 100

H10F - INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION 90

C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 87

C12N - MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA 81

B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM 79

B29C - SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 76

C09D - COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 59

C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE 57

Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION 55

B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS 54

H05K - PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS 53

Top 15 of 181 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Diversified

Claim Depth Standard

Velocity Declining

Where it ranks

Overall rank by patents

#545

Across all tracked assignees

Innovation Score

59.6 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 Kaneka Corporation hold?

Kaneka Corporation holds 824 US granted patents filed between 2015 and 2025, spanning 181 technology areas.

What is Kaneka Corporation's Innovation Score?

Kaneka Corporation has an Innovation Score of 59.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Kaneka Corporation focus on?

Kaneka Corporation's top technology area is C08L (COMPOSITIONS OF MACROMOLECULAR COMPOUNDS) with 186 patents. The company has filed patents in 181 CPC subclasses total.

Is Kaneka Corporation's patent filing rate increasing or decreasing?

Kaneka Corporation's recent filing velocity is -7% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Kaneka Corporation's patents?

Kaneka Corporation's patents average 12.9 claims each. This falls within the standard range, providing solid legal coverage.

How is the Kaneka Corporation 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

Kaneka's 824 grants land it in the top 4% 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 - Kaneka ranks #545 of 50,000. Top 50 holders
Most of this portfolio concentrates in C08L - see who else leads that technology area. C08L 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.