Where does Maruzen Petrochemical Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Maruzen Petrochemical Co., Ltd. ranks #8,637 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 Maruzen Petrochemical Co., Ltd. hold?

Maruzen Petrochemical Co., Ltd. holds 37 US utility patents granted between 2015 and 2025, spanning 28 technology areas.

What is Maruzen Petrochemical Co., Ltd.'s Innovation Score?

Maruzen Petrochemical Co., Ltd. has an Innovation Score of 51.2 out of 100 (top 12% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Maruzen Petrochemical Co., Ltd.'s patent grant rate increasing or decreasing?

Maruzen Petrochemical Co., Ltd.'s recent grant velocity is -16% 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 Maruzen Petrochemical Co., Ltd.'s patents?

Maruzen Petrochemical Co., Ltd.'s patents average 11.0 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 Maruzen Petrochemical 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

Maruzen Petrochemical Co., Ltd.

Q: What technology areas does Maruzen Petrochemical Co., Ltd. focus on?

Maruzen Petrochemical Co., Ltd.'s top technology area is C08F (Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds) with 29 patents, ranking #108 of 1,231 assignees active in that subclass. Grants appear in 28 CPC subclasses total.

USPTO PatentsView assignee record - 37 granted patents across 28 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: C08F (Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Maruzen ranks #8,637 of 49,997 tracked US assignees by granted-patent volume, with 37 patents across 28 technology areas.

#8,637
of 49,997 US assignees by volume: Top 12%
by Innovation Score (51.2/100): 11.0
avg claims per patent: -16%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R8637 · Foreign Corporation #8,637 · 37 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DOWN · BOOK-FULL

GRANTS-SMALL 37 grants
UPPER-Q #8,637/49,997
PHOTO-FINISH Liebert
CPC-FOCUS C08F · 28 areas
INNOV-PAR 51.2/100
CLAIMS-PAR 11.0 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -16% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Liebert 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 Maruzen’s 51.2 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 12.6 pts (25%) Velocity 13.3 pts (26%) Breadth 18.7 pts (37%) Claim depth 6.6 pts (13%)

Qualcomm Incorporated · highest

85
Anker Innovations… · near

51
Maruzen Petrochemical · this assignee

51
Piolax · near

51
University College… · near

51
ZIH · near

51
3D Lighting… · lowest

7

What this shows Maruzen's Innovation Score is 51.2/100 (top 12% 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 Maruzen?

Each dot is one of Maruzen’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). Maruzen’s own 11.0 claims/patent is at or below the 16.6 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Maruzen's grants concentrate

Maruzen Petrochemical Co., Ltd. is a focused PatentsView assignee: 28 CPC subclasses with 78.4% of grants classified under C08F (Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds). Peak complete grant year is 2018 (7 grants) versus a trough of 2 in 2015. By volume, Maruzen sits between Liebert Corporation and Medallia, Inc..

Maruzen's three-year grant acceleration

Maruzen Petrochemical Co., Ltd. shows 12 grants in 2022–2024 against only 6 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.

Liebert

37
Life AS

37
Ligand Pharmaceut…

37
Luminar

37
Match Group

37
Mitsui Chemicals…

37
Miura

37
Medallia

37
Maruzen Petrochem… ◀

37

What this shows Maruzen holds 37 patents at rank #8,636, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Maruzen

By rank, the assignees closest to #8,636 in granted patent volume.

Leaders in C08F (Macromolecular Compounds Obtained BY Reactions Only Invol…)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Maruzen, neither rank-band nor same-CPC leaders (those blocks stay above). In C08F (Macromolecular Compounds Obtained BY Reactions Only Invol…), Maruzen ranks #108 of 1,231 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (51 here).

University College CORK—NATIONAL University OF Ireland, Cork 51 Anker Innovations Technology Co., Ltd. 51 Piolax, Inc. 51 ZIH Corp. 51

Maruzen's Innovation Score vs. every tracked assignee

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

51 Top 12% higher than 88% 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

Maruzen Petrochemical Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	5.4%
2016	2	5.4%
2017	6	16.2%
2018	7	18.9%
2019	2	5.4%
2020	4	10.8%
2022	4	10.8%
2023	4	10.8%
2024	4	10.8%
2025partial year	2	5.4%

Which technologies does Maruzen Petrochemical Co., Ltd. patent most?

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 29

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 9

C07D - Heterocyclic Compounds 6

C07C - Acyclic OR Carbocyclic Compounds 6

C07B - General Methods OF Organic CHEMISTRY; Apparatus Therefor 6

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 5

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 5

G03F - Photomechanical Production OF Textured OR Patterned Surfaces, e.g. FOR Printing, FOR Processing OF Semiconductor DEVICES; Materials THEREFOR; Originals THEREFOR; Apparatus Specially Adapted THEREFOR; 5

C08L - Compositions OF Macromolecular Compounds 4

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 3

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 2

B82Y - Specific Uses OR Applications OF NANOSTRUCTURES; Measurement OR Analysis OF NANOSTRUCTURES; Manufacture OR Treatment OF Nanostructures 2

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

B01D - Separation 2

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 1

Top 15 of 28 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

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

Maruzen Petrochemical Co., Ltd.'s lead technology class is C08F (Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds), 78.4% of its portfolio - see every assignee active in that class. Explore C08F
Ranked #8,637 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Maruzen Petrochemical Co., Ltd. against Liebert Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 51.2/100 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.