Where does China University of Petroleum rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), China University of Petroleum ranks #11,602 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 China University of Petroleum hold?

China University of Petroleum holds 26 US utility patents granted between 2015 and 2025, spanning 30 technology areas.

What is China University of Petroleum's Innovation Score?

China University of Petroleum has an Innovation Score of 51.0 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 China University of Petroleum's patent grant rate increasing or decreasing?

China University of Petroleum's recent grant velocity is +143% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for China University of Petroleum's patents?

China University of Petroleum's patents average 9.7 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 China University of Petroleum 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

China University of Petroleum

Q: What technology areas does China University of Petroleum focus on?

China University of Petroleum's top technology area is E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells) with 14 patents, ranking #261 of 1,363 assignees active in that subclass. Grants appear in 30 CPC subclasses total.

USPTO PatentsView assignee record - 26 granted patents across 30 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: E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, China ranks #11,602 of 49,997 tracked US assignees by granted-patent volume, with 26 patents across 30 technology areas.

#11,602
of 49,997 US assignees by volume: Top 12%
by Innovation Score (51.0/100): 9.7
avg claims per patent: +143%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R11602 · Foreign Corporation #11,602 · 26 grants

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

GRANTS-SMALL 26 grants
UPPER-Q #11,602/49,997
PHOTO-FINISH Centre for Addiction…
CPC-FOCUS E21B · 30 areas
INNOV-PAR 51.0/100
CLAIMS-PAR 9.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +143% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Centre for Addiction and Mental Health (±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 China’s 51.0 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 11.4 pts (22%) Velocity 14.4 pts (28%) Breadth 19.4 pts (38%) Claim depth 5.8 pts (11%)

Qualcomm Incorporated · highest

85
China University of… · this assignee

51
Croda International · near

51
Foret Plasma Labs · near

51
National Chung Shan… · near

51
University OF Miyazaki · near

51
3D Lighting… · lowest

7

What this shows China's Innovation Score is 51.0/100 (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 China?

Each dot is one of China’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). China’s own 9.7 claims/patent is at or below the 13.3 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where China's grants concentrate

China University of Petroleum is a focused PatentsView assignee: 30 CPC subclasses with 53.8% of grants classified under E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells). Peak complete grant year is 2022 (5 grants) versus a trough of 1 in 2015. By volume, China sits between Centre for Addiction and Mental Health and Colebrook Bosson & Saunders (Products) Limited.

China's three-year grant acceleration

China University of Petroleum shows 13 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.

Centre for Addict…

26
Chan Li Machinery

26
Chart Energy & Ch…

26
China Jiliang Uni…

26
Chiral Photonics

26
Chromatic

26
Code42 Software

26
Colebrook Bosson…

26
China University… ◀

26

What this shows China holds 26 patents at rank #11,604, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near China

By rank, the assignees closest to #11,604 in granted patent volume.

Leaders in E21B (Earth OR Rock Drilling)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for China, neither rank-band nor same-CPC leaders (those blocks stay above). In E21B (Earth OR Rock Drilling), China ranks #261 of 1,363 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (51 here).

Foret Plasma Labs, LLC 51 Croda International PLC 51 National Chung Shan Institute OF Science AND Technology 51 University OF Miyazaki 51

China'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

China University of Petroleum patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	3.8%
2017	2	7.7%
2018	2	7.7%
2019	2	7.7%
2020	1	3.8%
2021	3	11.5%
2022	5	19.2%
2023	3	11.5%
2024	5	19.2%
2025partial year	2	7.7%

Which technologies does China University of Petroleum patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 14

C09K - Materials FOR Miscellaneous Applications, NOT Provided FOR Elsewhere 8

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 4

B01D - Separation 4

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

C10G - Cracking Hydrocarbon OILS; Production OF Liquid Hydrocarbon Mixtures, e.g. BY Destructive Hydrogenation, Oligomerisation, Polymerisation ; Recovery OF Hydrocarbon Oils From Oil-shale, Oil-sand, OR GASES; Refining Mixtures Mainly Consisting OF HYDROCARBONS; Reforming OF NAPHTHA; Mineral Waxes 3

Y02C - Capture, Storage, Sequestration OR Disposal OF Greenhouse Gases [GHG] 2

C10B - Destructive Distillation OF Carbonaceous Materials FOR Production OF GAS, Coke, TAR, OR Similar Materials 2

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 2

B01F - Mixing, e.g. Dissolving, Emulsifying OR Dispersing 2

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 1

F23L - Supplying AIR OR Non-combustible Liquids OR Gases TO Combustion Apparatus IN General ; Valves OR Dampers Specially Adapted FOR Controlling AIR Supply OR Draught IN Combustion Apparatus ; Inducing Draught IN Combustion APPARATUS; Tops FOR Chimneys OR Ventilating SHAFTS; Terminals FOR Flues 1

F23J - Removal OR Treatment OF Combustion Products OR Combustion RESIDUES; Flues 1

E02D - FOUNDATIONS; EXCAVATIONS; Embankments ; Underground OR Underwater Structures 1

B66F - Hoisting, Lifting, Hauling OR Pushing, NOT Otherwise Provided FOR, e.g. Devices Which Apply A Lifting OR Pushing Force Directly TO THE Surface OF A Load 1

Top 15 of 30 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

China University of Petroleum's patent record in context - here's where to go next.

China University of Petroleum's lead technology class is E21B (Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells), 53.8% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #11,602 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare China University of Petroleum against Centre for Addiction and Mental Health, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 51.0/100 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.