Where does Zoltek Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Zoltek Corporation ranks #44,265 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 Zoltek Corporation hold?

Zoltek Corporation holds 6 US utility patents granted between 2015 and 2025, spanning 16 technology areas.

What is Zoltek Corporation's Innovation Score?

Zoltek Corporation has an Innovation Score of 49.9 out of 100 (top 14% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Zoltek Corporation focus on?

Zoltek Corporation's top technology area is C08K (Use of inorganic or non-macromolecular organic substances as compounding ingredients) with 4 patents, ranking #641 of 1,963 assignees active in that subclass. Grants appear in 16 CPC subclasses total.

Is Zoltek Corporation's patent grant rate increasing or decreasing?

Zoltek Corporation's recent grant velocity is +300% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Zoltek Corporation's patents?

Zoltek Corporation's patents average 15.0 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 Zoltek Corporation 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

Zoltek Corporation

USPTO PatentsView assignee record - 6 granted patents across 16 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: C08K (Use of inorganic or non-macromolecular organic substances as compounding ingredients).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Zoltek ranks #44,265 of 49,997 tracked US assignees by granted-patent volume, with 6 patents across 16 technology areas.

#44,265
of 49,997 US assignees by volume: Top 14%
by Innovation Score (49.9/100): 15.0
avg claims per patent: +300%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R44265 · US Corporation #44,265 · 6 grants

GRANTS-MICRO · LOWER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-RICH · TYPE-USCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 6 grants
LOWER-Q #44,265/49,997
PHOTO-FINISH asphericon
CPC-FOCUS C08K · 16 areas
INNOV-PAR 49.9/100
CLAIMS-RICH 15.0 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +300% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: asphericon GmbH (±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 Zoltek’s 49.9 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 6.7 pts (13%) Velocity 20.0 pts (40%) Breadth 14.1 pts (28%) Claim depth 9.0 pts (18%)

Qualcomm Incorporated · highest

85
Alibaba Singapore… · near

50
Apalta Patents OÜ · near

50
Connectify · near

50
Uster · near

50
Zoltek · this assignee

50
3D Lighting… · lowest

7

What this shows Zoltek's Innovation Score is 49.9/100 (top 14% 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 Zoltek?

Each dot is one of Zoltek’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). Zoltek’s own 15.0 claims/patent is at or below the 16.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Zoltek's grants concentrate

Zoltek Corporation is a focused PatentsView assignee: 16 CPC subclasses with 66.7% of grants classified under C08K (Use of inorganic or non-macromolecular organic substances as compounding ingredients). Peak complete grant year is 2023 (2 grants) versus a trough of 1 in 2015. By volume, Zoltek sits between Zivo Bioscience, Inc. and barnesandnoble.com llc.

Zoltek's three-year grant acceleration

Zoltek Corporation shows 4 grants in 2022–2024 against only 0 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.

Zivo Bioscience

6
Zoe

6
Zoetis Belgium

6
Zogenix

6
Zuca

6
]Koninklije Phili…

6
asphericon

6
barnesandnoble com

6
Zoltek ◀

6

What this shows Zoltek holds 6 patents at rank #44,238, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Zoltek

By rank, the assignees closest to #44,238 in granted patent volume.

Leaders in C08K (Use of inorganic or non-macromolecular organic substances…)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Zoltek, neither rank-band nor same-CPC leaders (those blocks stay above). In C08K (Use of inorganic or non-macromolecular organic substances…), Zoltek ranks #641 of 1,963 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (50 here).

Apalta Patents OÜ 50 Alibaba Singapore Holding Private Limited 50 Uster Technologies AG 50 Connectify, Inc. 50

Zoltek's Innovation Score vs. every tracked assignee

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

50 Top 14% higher than 86% 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

Zoltek Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	16.7%
2022	1	16.7%
2023	2	33.3%
2024	1	16.7%
2025partial year	1	16.7%

Which technologies does Zoltek Corporation patent most?

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 4

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 3

F03D - Wind Motors 3

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 3

F05B - Indexing Scheme Relating TO Wind, Spring, Weight, Inertia OR Like Motors, TO Machines OR Engines FOR Liquids Covered BY Subclasses F03b, F03d AND F03g 3

B65H - Handling Thin OR Filamentary Material, e.g. Sheets, Webs, Cables 2

H01B - CABLES; CONDUCTORS; INSULATORS; Selection OF Materials FOR Their Conductive, Insulating OR Dielectric Properties 2

C09J - ADHESIVES; Non-mechanical Aspects OF Adhesive Processes IN GENERAL; Adhesive Processes NOT Provided FOR ELSEWHERE; USE OF Materials AS Adhesives 2

C08J - WORKING-UP; General Processes OF COMPOUNDING; After-treatment NOT Covered BY Subclasses C08b, C08c, C08f, C08g or C08h 2

C03C - Chemical Composition OF Glasses, Glazes OR Vitreous ENAMELS; Surface Treatment OF GLASS; Surface Treatment OF Fibres OR Filaments Made From Glass, Minerals OR SLAGS; Joining Glass TO Glass OR Other Materials 2

D02J - Finishing OR Dressing OF Filaments, Yarns, Threads, Cords, Ropes OR THE Like 1

D01H - Spinning OR Twisting 1

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 1

D06M - Treatment, NOT Provided FOR Elsewhere IN Class D06, OF Fibres, Threads, Yarns, Fabrics, Feathers OR Fibrous Goods Made From Such Materials 1

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 1

Top 15 of 16 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

Zoltek Corporation's patent record in context - here's where to go next.

Zoltek Corporation's lead technology class is C08K (Use of inorganic or non-macromolecular organic substances as compounding ingredients), 66.7% of its portfolio - see every assignee active in that class. Explore C08K
Ranked #44,265 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Zoltek Corporation against Zivo Bioscience, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 49.9/100 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.