Where does Sumitomo Seika Chemicals Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Sumitomo Seika Chemicals Co., Ltd. ranks #2,188 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Sumitomo Seika Chemicals Co., Ltd. hold?

Sumitomo Seika Chemicals Co., Ltd. holds 180 US utility patents granted 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 (top 9% of the corpus). This composite metric weighs portfolio volume (40%), grant 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, ranking #86 of 2,352 assignees active in that subclass. Grants appear in 63 CPC subclasses total.

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

Sumitomo Seika Chemicals Co., Ltd.'s recent grant velocity is -22% compared to the prior five-year period (grant years, not application filing dates). Grant 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 an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

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.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Sumitomo Seika Chemicals Co., Ltd.

USPTO PatentsView assignee record - 180 granted patents across 63 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: C08L (Compositions OF Macromolecular Compounds).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Sumitomo ranks #2,188 of 49,997 tracked US assignees by granted-patent volume, with 180 patents across 63 technology areas.

#2,188
of 49,997 US assignees by volume: Top 9%
by Innovation Score (53.5/100): 8.3
avg claims per patent: -22%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2188 · Foreign Corporation #2,188 · 180 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-MID 180 grants
TOP-DECILE #2,188/49,997
PHOTO-FINISH Nipro
CPC-WIDE C08L · 63 areas
INNOV-PAR 53.5/100
CLAIMS-PAR 8.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -22% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Nipro Corporation (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Sumitomo’s 53.5 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 18.0 pts (34%) Velocity 5.6 pts (10%) Breadth 25.0 pts (47%) Claim depth 5.0 pts (9%)

Qualcomm Incorporated · highest

85
Powermat · near

54
simplehuman · near

54
The Coleman · near

54
Sumitomo Seika… · this assignee

54
Toyo Kohan · near

54
3D Lighting… · lowest

7

What this shows Sumitomo's Innovation Score is 53.5/100 (top 9% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Sumitomo?

Each dot is one of Sumitomo’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Sumitomo’s own 8.3 claims/patent is at or below the 15.1 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Sumitomo vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

How Sumitomo's grant cadence moved

Between 2020–2024, Sumitomo Seika Chemicals Co., Ltd. received 73 grants versus 94 in 2015–2019 (-22% equal-window velocity, below median growth). Across complete PatentsView years, output peaked in 2015 at 23 grants and bottomed in 2023 at 8. Lead class C08L accounts for 32.2% of the portfolio across 63 subclasses. Volume neighbours: Nipro Corporation (#2,184) and Bosch Automotive Service Solutions, Inc. (#2,192).

Sumitomo's three-year grant acceleration

From 2019–2021 to 2022–2024, Sumitomo Seika Chemicals Co., Ltd. moved from 48 to 40 grants (0.83x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #1,707. See the growth leaderboard.

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.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Sumitomo, neither rank-band nor same-CPC leaders (those blocks stay above). In C08L (Compositions OF Macromolecular Compounds), Sumitomo ranks #86 of 2,352 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (54 here).

Toyo Kohan Co., Ltd. 54 simplehuman, LLC 54 The Coleman Company, Inc. 54 Powermat Technologies Ltd. 54

Similar claim depth

Nearest assignees by average claims per patent (8.3 here).

Horiba, Ltd. 8.3 avg Toto Ltd. 8.3 avg The Noco Company 8.3 avg Mitsubishi Jidosha Kogyo Kabushiki Kaisha 8.3 avg

Sumitomo's Innovation Score vs. every tracked assignee

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

54 Top 9% higher than 91% of 49,997 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%
2025partial year	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

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Sumitomo Seika Chemicals Co., Ltd.'s patent record in context - here's where to go next.

Sumitomo Seika Chemicals Co., Ltd.'s lead technology class is C08L (Compositions OF Macromolecular Compounds), 32.2% of its portfolio - see every assignee active in that class. Explore C08L
Ranked #2,188 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Sumitomo Seika Chemicals Co., Ltd. against Nipro Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 53.5/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

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

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 by PlainPatent , US Patent Intelligence Editorial Process · 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.