Where does ChemStone, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), ChemStone, Inc. ranks #45,620 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 ChemStone, Inc. hold?

ChemStone, Inc. holds 5 US utility patents granted between 2021 and 2024, spanning 8 technology areas.

What is ChemStone, Inc.'s Innovation Score?

ChemStone, Inc. has an Innovation Score of 46.1 out of 100 (top 21% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is ChemStone, Inc.'s patent grant rate increasing or decreasing?

Insufficient historical data is available to calculate a velocity trend for ChemStone, Inc..

What does claim depth mean for ChemStone, Inc.'s patents?

ChemStone, Inc.'s patents average 16.6 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 ChemStone, Inc. 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 US Corporation

ChemStone, Inc.

Q: What technology areas does ChemStone, Inc. focus on?

ChemStone, Inc.'s top technology area is D21H (Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherwise Provided FOR) with 5 patents, ranking #78 of 361 assignees active in that subclass. Grants appear in 8 CPC subclasses total.

USPTO PatentsView assignee record - 5 granted patents across 8 technology areas, recorded in grant years 2021–2024. 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: D21H (Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherw).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Chemstone ranks #45,620 of 49,997 tracked US assignees by granted-patent volume, with 5 patents across 8 technology areas.

#45,620
of 49,997 US assignees by volume: Top 21%
by Innovation Score (46.1/100): 16.6
avg claims per patent

USPTO PatentsView assignee plate

Corpus R45620 · US Corporation #45,620 · 5 grants

GRANTS-MICRO · BOTTOM-DECILE · PHOTO-FINISH · CPC-NARROW · INNOV-PAR · CLAIMS-RICH · TYPE-USCORP · SPAN-YRS · BOOK-RICH

GRANTS-MICRO 5 grants
BOTTOM-DECILE #45,620/49,997
PHOTO-FINISH Check Point…
CPC-NARROW D21H · 8 areas
INNOV-PAR 46.1/100
CLAIMS-RICH 16.6 claims/avg
TYPE-USCORP US Corporation
SPAN-YRS 2021–2024 · 4y
BOOK-RICH 9/10 fields

Nearest grant-volume peer: Check Point Advanced Threat Prevention 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 Chemstone’s 46.1 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 6.2 pts (13%) Velocity 20.0 pts (43%) Breadth 10.0 pts (22%) Claim depth 10.0 pts (22%)

Qualcomm Incorporated · highest

85
ChemStone · this assignee

46
3D Lighting… · lowest

7

What this shows Chemstone's Innovation Score is 46.1/100 (top 21% 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 Chemstone?

Each dot is one of Chemstone’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). Chemstone’s own 16.6 claims/patent is ABOVE the 16.4 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Chemstone's grants concentrate

ChemStone, Inc. is a focused PatentsView assignee: 8 CPC subclasses with 100% of grants classified under D21H (Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherw). Peak complete grant year is 2024 (4 grants) versus a trough of 1 in 2021. By volume, Chemstone sits between Check Point Advanced Threat Prevention Ltd and Chenope, Inc..

Chemstone's three-year grant acceleration

ChemStone, Inc. shows 4 grants in 2022–2024 against only 1 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.

Check Point Advan…

5
Cheese & Whey Sys…

5
Chelak Medical So…

5
Chemlink Laborato…

5
Chembeau

5
Chemrus

5
Chengli Li

5
Chenope

5
Chemstone ◀

5

What this shows ChemStone holds 5 patents at rank #45,818, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near ChemStone

By rank, the assignees closest to #45,818 in granted patent volume.

Leaders in D21H (Pulp Compositions)

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

Chemstone's Innovation Score vs. every tracked assignee

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

46 Top 21% higher than 79% 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 · 2021–2024

Grants by year

Teal-shaded recent years (2020–present) versus the 2021–2019 baseline. Full figures in the table below.

View data table

ChemStone, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2021	1	20.0%
2024	4	80.0%

Which technologies does ChemStone, Inc. patent most?

D21H - Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherwise Provided FOR 5

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 2

C08L - Compositions OF Macromolecular Compounds 2

D21C - Production OF Cellulose BY Removing Non-cellulose Substances From Cellulose-containing MATERIALS; Regeneration OF Pulping LIQUORS; Apparatus Therefor 2

C07C - Acyclic OR Carbocyclic Compounds 2

C07H - SUGARS; Derivatives THEREOF; NUCLEOSIDES; NUCLEOTIDES; Nucleic Acids 1

D21J - FIBREBOARD; Manufacture OF Articles From Cellulosic Fibrous Suspensions OR From Papier-mache 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

Top 8 of 8 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

ChemStone, Inc.'s patent record in context - here's where to go next.

ChemStone, Inc.'s lead technology class is D21H (Pulp COMPOSITIONS; Preparation Thereof NOT Covered BY Subclasses D21c OR D21D; Impregnating OR Coating OF PAPER; Treatment OF Finished Paper NOT Covered BY Class B31 OR Subclass D21G; Paper NOT Otherw), 100% of its portfolio - see every assignee active in that class. Explore D21H
Ranked #45,620 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare ChemStone, Inc. against Check Point Advanced Threat Prevention Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 46.1/100 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.