Where does Koei Chemical Company, Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Koei Chemical Company, Limited ranks #29,223 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 Koei Chemical Company, Limited hold?

Koei Chemical Company, Limited holds 9 US utility patents granted between 2015 and 2025, spanning 7 technology areas.

What is Koei Chemical Company, Limited's Innovation Score?

Koei Chemical Company, Limited has an Innovation Score of 31.2 out of 100 (37th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Koei Chemical Company, Limited focus on?

Koei Chemical Company, Limited's top technology area is C07D (Heterocyclic Compounds) with 5 patents, ranking #1,402 of 3,165 assignees active in that subclass. Grants appear in 7 CPC subclasses total.

Is Koei Chemical Company, Limited's patent grant rate increasing or decreasing?

Koei Chemical Company, Limited's recent grant velocity is +0% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Koei Chemical Company, Limited's patents?

Koei Chemical Company, Limited's patents average 12.0 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 Koei Chemical Company, Limited 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

Koei Chemical Company, Limited

USPTO PatentsView assignee record - 9 granted patents across 7 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: C07D (Heterocyclic Compounds).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Koei ranks #29,223 of 49,997 tracked US assignees by granted-patent volume, with 9 patents across 7 technology areas.

#29,223
of 49,997 US assignees by volume: 37th percentile
by Innovation Score (31.2/100): 12.0
avg claims per patent: +0%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R29223 · Foreign Corporation #29,223 · 9 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-NARROW · INNOV-THIN · CLAIMS-RICH · TYPE-FRNCORP · VEL-FLAT · BOOK-FULL

GRANTS-MICRO 9 grants
MID-PACK #29,223/49,997
PHOTO-FINISH KOA Glass
CPC-NARROW C07D · 7 areas
INNOV-THIN 31.2/100
CLAIMS-RICH 12.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-FLAT +0% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: KOA Glass Co., Ltd (±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 Koei’s 31.2 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 8.0 pts (26%) Velocity 6.7 pts (21%) Breadth 9.4 pts (30%) Claim depth 7.2 pts (23%)

Qualcomm Incorporated · highest

85
Koei Chemical · this assignee

31
3D Lighting… · lowest

7

What this shows Koei's Innovation Score is 31.2/100 (37th percentile 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 Koei?

Each dot is one of Koei’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). Koei’s own 12.0 claims/patent is ABOVE the 10.1 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Koei's grants concentrate

Koei Chemical Company, Limited is a focused PatentsView assignee: 7 CPC subclasses with 55.6% of grants classified under C07D (Heterocyclic Compounds). By volume, Koei sits between KOA Glass Co., Ltd and Korea Wheel Corporation.

Koei's three-year grant acceleration

Koei Chemical Company, Limited shows 2 grants in 2022–2024 against only 2 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

KOA Glass

9
KOA Health Digita…

9
Kobo Products

9
Kochi University

9
Kordsa Global End…

9
Korea Minting Sec…

9
Korea United Pharm

9
Korea Wheel

9
Koei Chemical ◀

9

What this shows Koei holds 9 patents at rank #29,182, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Koei

By rank, the assignees closest to #29,182 in granted patent volume.

Leaders in C07D (Heterocyclic Compounds)

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

Koei's Innovation Score vs. every tracked assignee

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

31 37th percentile higher than 37% 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

Koei Chemical Company, Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	11.1%
2016	1	11.1%
2017	1	11.1%
2018	1	11.1%
2020	1	11.1%
2021	1	11.1%
2023	1	11.1%
2024	1	11.1%
2025partial year	1	11.1%

Which technologies does Koei Chemical Company, Limited patent most?

C07D - Heterocyclic Compounds 5

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 4

C07C - Acyclic OR Carbocyclic Compounds 4

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 2

C07F - Acyclic, Carbocyclic OR Heterocyclic Compounds Containing Elements Other Than Carbon, Hydrogen, Halogen, Oxygen, Nitrogen, Sulfur, Selenium OR Tellurium 2

C08L - Compositions OF Macromolecular Compounds 1

C08B - POLYSACCHARIDES; Derivatives Thereof 1

Top 7 of 7 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

Koei Chemical Company, Limited's patent record in context - here's where to go next.

Koei Chemical Company, Limited's lead technology class is C07D (Heterocyclic Compounds), 55.6% of its portfolio - see every assignee active in that class. Explore C07D
Ranked #29,223 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Koei Chemical Company, Limited against KOA Glass Co., Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 31.2/100 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.