USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Sumitomo Seika Chemicals Co., Ltd.

USPTO PatentsView assignee record - 180 granted patents across 63 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

180

Total patents granted

CPC technology areas

8.3

Avg claims per patent

-9%

5-year filing velocity

The verdict

Sumitomo holds 180 US patents across 63 technology areas, rank #2,188 of 50,000 tracked assignees.

#2,188
of 50,000 US assignees by volume: Top 9%
by Innovation Score (53.5/100): 8.3
avg claims per patent: -9%
filing velocity, last 5 yrs

Portfolio overview

Sumitomo Seika Chemicals Co., Ltd. has been granted 180 US utility patents between 2015 and 2025, placing Sumitomo Seika Chemicals Co., Ltd. at rank #2,188 across all assignees tracked by PlainPatent. This portfolio spans 63 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.3 claims per patent with primary concentration in C08L (COMPOSITIONS OF MACROMOLECULAR COMPOUNDS). As a Foreign Corporation, Sumitomo Seika Chemicals Co., Ltd. is one of the broader-portfolio assignees in the PatentsView dataset. By volume, Sumitomo sits between Nipro Corporation (180 patents, rank #2,184) and Bosch Automotive Service Solutions, Inc. (179 patents, rank #2,192) - the closest US assignees by grant volume. The composite Innovation Score of 53.5/100 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 86 grants, compared with 94 in the 2015–2019 window, a -9% 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. Sumitomo Seika Chemicals Co., Ltd.'s 8.3 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 63 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Sumitomo Seika Chemicals Co., Ltd. against peers pursuing similar technology classes.

Nipro

180
Olympus Medical S…

180
Samtec

180
Stmicroelectronic…

180
Sumitomo Seika Ch… ◀

180
Ansaldo Energia S…

179
Alcatel-lucent USA

179
Bauer Hockey

179
Bosch Automotive…

179

What this shows Sumitomo holds 180 patents at rank #2,188, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Sumitomo

By rank, the assignees closest to #2,188 in granted patent volume.

Leaders in C08L (Compositions OF Macromolecular Compounds)

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

Sumitomo's Innovation Score vs. every tracked assignee

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

54 Top 9% higher than 91% 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

Sumitomo Seika Chemicals Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	23	12.8%
2016	16	8.9%
2017	19	10.6%
2018	21	11.7%
2019	15	8.3%
2020	17	9.4%
2021	16	8.9%
2022	17	9.4%
2023	8	4.4%
2024	15	8.3%
2025	13	7.2%

Which technologies does Sumitomo Seika Chemicals Co., Ltd. patent most?

C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 58

C08F - MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS 56

C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS 50

B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS 43

C08J - WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H 39

A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES 31

A61F - FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRS 30

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 29

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 22

Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION 21

H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY 18

H01L - SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10 16

A61K - PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES 15

C09J - ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES 14

C08B - POLYSACCHARIDES; DERIVATIVES THEREOF 12

Top 15 of 63 technology areas

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#2,188

Across all tracked assignees

Innovation Score

53.5 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 Sumitomo Seika Chemicals Co., Ltd. hold?

Sumitomo Seika Chemicals Co., Ltd. holds 180 US granted patents filed between 2015 and 2025, spanning 63 technology areas.

What is Sumitomo Seika Chemicals Co., Ltd.'s Innovation Score?

Sumitomo Seika Chemicals Co., Ltd. has an Innovation Score of 53.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Sumitomo Seika Chemicals Co., Ltd. focus on?

Sumitomo Seika Chemicals Co., Ltd.'s top technology area is C08L (COMPOSITIONS OF MACROMOLECULAR COMPOUNDS) with 58 patents. The company has filed patents in 63 CPC subclasses total.

Is Sumitomo Seika Chemicals Co., Ltd.'s patent filing rate increasing or decreasing?

Sumitomo Seika Chemicals Co., Ltd.'s recent filing velocity is -9% compared to the prior five-year period. Filing activity has slowed relative to earlier years.

What does claim depth mean for Sumitomo Seika Chemicals Co., Ltd.'s patents?

Sumitomo Seika Chemicals Co., Ltd.'s patents average 8.3 claims each. This is relatively simple claim structure, typical for focused inventions.

How is the Sumitomo Seika Chemicals 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

Sumitomo's 180 grants land it in the top 9% 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 - Sumitomo ranks #2,188 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.