Where does Changzhou University rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Changzhou University ranks #4,186 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 Changzhou University hold?

Changzhou University holds 85 US utility patents granted between 2015 and 2025, spanning 84 technology areas.

What is Changzhou University's Innovation Score?

Changzhou University has an Innovation Score of 65.6 out of 100 (top 1% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Changzhou University focus on?

Changzhou University's top technology area is B01J (Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus) with 13 patents, ranking #365 of 2,755 assignees active in that subclass. Grants appear in 84 CPC subclasses total.

Is Changzhou University's patent grant rate increasing or decreasing?

Changzhou University's recent grant velocity is +578% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Changzhou University's patents?

Changzhou University's patents average 8.7 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 Changzhou University 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

Changzhou University

USPTO PatentsView assignee record - 85 granted patents across 84 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: B01J (Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Changzhou ranks #4,186 of 49,997 tracked US assignees by granted-patent volume, with 85 patents across 84 technology areas.

#4,186
of 49,997 US assignees by volume: Top 1%
by Innovation Score (65.6/100): 8.7
avg claims per patent: +578%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R4186 · Foreign Corporation #4,186 · 85 grants

GRANTS-SMALL · TOP-DECILE · PHOTO-FINISH · CPC-WIDE · INNOV-STRONG · CLAIMS-PAR · TYPE-FRNCORP · VEL-SURGE · BOOK-FULL

GRANTS-SMALL 85 grants
TOP-DECILE #4,186/49,997
PHOTO-FINISH Beijing Jingdong…
CPC-WIDE B01J · 84 areas
INNOV-STRONG 65.6/100
CLAIMS-PAR 8.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +578% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Beijing Jingdong Qianshi Technology 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 Changzhou’s 65.6 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 15.4 pts (23%) Velocity 20.0 pts (30%) Breadth 25.0 pts (38%) Claim depth 5.2 pts (8%)

Qualcomm Incorporated · highest

85
Corteva Agriscience · near

66
Woven Planet North… · near

66
Changzhou University · this assignee

66
Pure Storage · near

66
Darwin Precisions · near

66
3D Lighting… · lowest

7

What this shows Changzhou's Innovation Score is 65.6/100 (top 1% 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 Changzhou?

Each dot is one of Changzhou’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). Changzhou’s own 8.7 claims/patent is at or below the 16.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

How Changzhou's grant cadence moved

Between 2020–2024, Changzhou University received 61 grants versus 9 in 2015–2019 (+578% equal-window velocity, top decile growth). Across complete PatentsView years, output peaked in 2024 at 25 grants and bottomed in 2015 at 2. Lead class B01J accounts for 15.3% of the portfolio across 84 subclasses. Volume neighbours: Beijing Jingdong Qianshi Technology Co., Ltd. (#4,182) and CorMatrix Cardiovascular, Inc. (#4,190).

Changzhou's three-year grant acceleration

Changzhou University shows 56 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.

Beijing Jingdong…

85
Biomarin Pharmace…

85
Boehringer Ingelh…

85
Bitdefender IPR M…

85
Chemetall

85
Construction Rese…

85
Cooper-standard A…

85
Cormatrix Cardiov…

85
Changzhou Univers… ◀

85

What this shows Changzhou holds 85 patents at rank #4,186, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Changzhou

By rank, the assignees closest to #4,186 in granted patent volume.

Leaders in B01J (Chemical OR Physical Processes)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Changzhou, neither rank-band nor same-CPC leaders (those blocks stay above). In B01J (Chemical OR Physical Processes), Changzhou ranks #365 of 2,755 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (66 here).

Pure Storage, Inc. 66 Corteva Agriscience LLC 66 Darwin Precisions Corporation 66 Woven Planet North America, Inc. 66

Similar claim depth

Nearest assignees by average claims per patent (8.7 here).

Kanzaki Kokyukoki MFG. Co., Ltd. 8.7 avg Sears Brands, L.L.C. 8.7 avg Pacific Market International, LLC 8.7 avg Camelbak Products, LLC 8.6 avg

Changzhou's Innovation Score vs. every tracked assignee

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

66 Top 1% higher than 99% 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

Changzhou University patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	2.4%
2016	2	2.4%
2017	3	3.5%
2019	2	2.4%
2020	3	3.5%
2021	2	2.4%
2022	15	17.6%
2023	16	18.8%
2024	25	29.4%
2025partial year	15	17.6%

Which technologies does Changzhou University patent most?

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 13

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 11

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 9

C07D - Heterocyclic Compounds 8

C07C - Acyclic OR Carbocyclic Compounds 7

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 7

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 7

C08L - Compositions OF Macromolecular Compounds 6

C02F - Treatment OF Water, Waste Water, Sewage, OR Sludge 6

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 6

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 6

Y02A - Technologies FOR Adaptation TO Climate Change 5

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 5

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 5

E02B - Hydraulic Engineering 4

Top 15 of 84 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

Changzhou University's patent record in context - here's where to go next.

Changzhou University's lead technology class is B01J (Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus), 15.3% of its portfolio - see every assignee active in that class. Explore B01J
Ranked #4,186 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Changzhou University against Beijing Jingdong Qianshi Technology Co., Ltd., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 65.6/100 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.