Where does Kaken Pharmaceutical Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Kaken Pharmaceutical Co., Ltd. ranks #15,403 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 Kaken Pharmaceutical Co., Ltd. hold?

Kaken Pharmaceutical Co., Ltd. holds 19 US utility patents granted between 2015 and 2025, spanning 15 technology areas.

What is Kaken Pharmaceutical Co., Ltd.'s Innovation Score?

Kaken Pharmaceutical Co., Ltd. has an Innovation Score of 32.6 out of 100 (42nd 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 Kaken Pharmaceutical Co., Ltd. focus on?

Kaken Pharmaceutical Co., Ltd.'s top technology area is C07D (Heterocyclic Compounds) with 13 patents, ranking #636 of 3,165 assignees active in that subclass. Grants appear in 15 CPC subclasses total.

Is Kaken Pharmaceutical Co., Ltd.'s patent grant rate increasing or decreasing?

Kaken Pharmaceutical Co., Ltd.'s recent grant velocity is -30% 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 Kaken Pharmaceutical Co., Ltd.'s patents?

Kaken Pharmaceutical Co., Ltd.'s patents average 12.7 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 Kaken Pharmaceutical 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

Kaken Pharmaceutical Co., Ltd.

USPTO PatentsView assignee record - 19 granted patents across 15 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, Kaken ranks #15,403 of 49,997 tracked US assignees by granted-patent volume, with 19 patents across 15 technology areas.

#15,403
of 49,997 US assignees by volume: 42nd percentile
by Innovation Score (32.6/100): 12.7
avg claims per patent: -30%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R15403 · Foreign Corporation #15,403 · 19 grants

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

GRANTS-MICRO 19 grants
MID-PACK #15,403/49,997
PHOTO-FINISH Johnan Manufacturing
CPC-FOCUS C07D · 15 areas
INNOV-THIN 32.6/100
CLAIMS-RICH 12.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -30% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Johnan Manufacturing Inc. (±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 Kaken’s 32.6 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 10.3 pts (32%) Velocity 1.0 pts (3%) Breadth 13.7 pts (42%) Claim depth 7.6 pts (23%)

Qualcomm Incorporated · highest

85
Kaken Pharmaceutical · this assignee

33
3D Lighting… · lowest

7

What this shows Kaken's Innovation Score is 32.6/100 (42nd 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 Kaken?

Each dot is one of Kaken’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). Kaken’s own 12.7 claims/patent is ABOVE the 10.3 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Kaken's grants concentrate

Kaken Pharmaceutical Co., Ltd. is a focused PatentsView assignee: 15 CPC subclasses with 68.4% of grants classified under C07D (Heterocyclic Compounds). Peak complete grant year is 2020 (5 grants) versus a trough of 1 in 2019. By volume, Kaken sits between Johnan Manufacturing Inc. and Kylin Sanitary Technology (Xiamen) Co., Ltd..

Kaken's three-year grant acceleration

Kaken Pharmaceutical Co., Ltd. shows 1 grants in 2022–2024 against only 7 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.

Johnan Manufactur…

19
Joint Development

19
Joint Stock “Scie…

19
Jumpcloud

19
Kawasaki Railcar…

19
Kodacloud

19
KVH Industries

19
Kylin Sanitary Te…

19
Kaken Pharmaceuti… ◀

19

What this shows Kaken holds 19 patents at rank #15,401, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Kaken

By rank, the assignees closest to #15,401 in granted patent volume.

Leaders in C07D (Heterocyclic Compounds)

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

Kaken's Innovation Score vs. every tracked assignee

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

33 42nd percentile higher than 42% 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

Kaken Pharmaceutical Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	10.5%
2016	3	15.8%
2017	2	10.5%
2018	2	10.5%
2019	1	5.3%
2020	5	26.3%
2021	1	5.3%
2022	1	5.3%
2025partial year	2	10.5%

Which technologies does Kaken Pharmaceutical Co., Ltd. patent most?

C07D - Heterocyclic Compounds 13

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 11

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 8

A01N - Preservation OF Bodies OF Humans OR Animals OR Plants OR Parts Thereof ; Biocides, e.g. AS Disinfectants, AS Pesticides OR AS Herbicides ; Pest Repellants OR ATTRACTANTS; Plant Growth Regulators 2

Y02A - Technologies FOR Adaptation TO Climate Change 2

A61M - Devices FOR Introducing Media Into, OR Onto, THE Body ; Devices FOR Transducing Body Media OR FOR Taking Media From THE Body ; Devices FOR Producing OR Ending Sleep OR Stupor 2

C12N - Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media 1

C07C - Acyclic OR Carbocyclic Compounds 1

A61J - Containers Specially Adapted FOR Medical OR Pharmaceutical PURPOSES; Devices OR Methods Specially Adapted FOR Bringing Pharmaceutical Products Into Particular Physical OR Administering FORMS; Devices FOR Administering Food OR Medicines ORALLY; Baby COMFORTERS; Devices FOR Receiving Spittle 1

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 1

C07F - Acyclic, Carbocyclic OR Heterocyclic Compounds Containing Elements Other Than Carbon, Hydrogen, Halogen, Oxygen, Nitrogen, Sulfur, Selenium OR Tellurium 1

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 1

G01F - Measuring Volume, Volume Flow, Mass Flow OR Liquid LEVEL; Metering BY Volume 1

B05B - Spraying APPARATUS; Atomising APPARATUS; Nozzles 1

A46B - Brushes 1

Top 15 of 15 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

Kaken Pharmaceutical Co., Ltd.'s patent record in context - here's where to go next.

Kaken Pharmaceutical Co., Ltd.'s lead technology class is C07D (Heterocyclic Compounds), 68.4% of its portfolio - see every assignee active in that class. Explore C07D
Ranked #15,403 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Kaken Pharmaceutical Co., Ltd. against Johnan Manufacturing Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 32.6/100 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.