PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

China University Of Petroleum

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).

Explore the portfolio See the ranking
26
Total patents granted
30
CPC technology areas
9.7
Avg claims per patent
+143%
5-year grant velocity

The verdict

According to USPTO PatentsView, China ranks #11,602 of 50,000 tracked US assignees by granted-patent volume, with 26 patents across 30 technology areas.

#11,602
of 50,000 US assignees by volume
Top 12%
by Innovation Score (51.0/100)
9.7
avg claims per patent
+143%
grant velocity, last 5 yrs

Portfolio overview

China University Of Petroleum has been granted 26 US utility patents between 2015 and 2025, placing China University Of Petroleum at #11,602 of 50,000 across all assignees tracked by PlainPatent. This portfolio spans 30 distinct Cooperative Patent Classification (CPC) subclasses, averaging 9.7 claims per patent with primary concentration in E21B (EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS). As a Foreign Corporation, China University Of Petroleum is one of the more focused assignees in the PatentsView dataset. By volume, China sits between Centre For Addiction And Mental Health (26 patents, rank #11,600) and Colebrook Bosson & Saunders (products) Limited (26 patents, rank #11,608) - the closest US assignees by grant volume. The composite Innovation Score of 51.0/100 blends portfolio volume, grant velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Grant cadence records the difference between two grant-year windows. Between 2020 and 2024 the company received 17 grants, compared with 7 in the 2015–2019 window, a +143% shift in five-year grant velocity. Both windows cover five complete grant years; the latest PatentsView year is a partial release and is excluded from this comparison, though it still appears in the yearly table and chart below. Grant timing can lag the related application by years, so this comparison does not establish current R&D spending, strategic intent, or a company’s application activity. The Foreign Corporation classification provides context for the assignee record, not a conclusion about its business strategy.

Claim depth and technology breadth describe this aggregate record. China University Of Petroleum's 9.7 average claims per patent is an average count, not a measure of claim scope, legal strength, enforceability, or design-around risk. The record spans 30 CPC subclasses. Combined with portfolio volume, these figures let readers compare the documented grant records of assignees in similar technology classes.

Who files at China's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

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.

Source USPTO PatentsView, granted utility patents As of 2015–2025

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.

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 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). Below this entry. 40–50: 11,491 US assignees (23%). Below this entry. 50–60: 5,058 US assignees (10%). This entry sits in this band. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

0123456 2015201720182019202020212022202320242025 2
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?

Top 15 of 30 technology areas

Grant record at a glance

Portfolio Volume 26 grants
CPC subclasses 30
Avg. claims / grant 9.7
Velocity +143%

Historical grant data only; it does not rate legal strength or current strategy.

Where it ranks

Overall rank by patents

#11,602

of 50,000 tracked assignees

Innovation Score

51.0 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

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 50,000 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%).
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. Grants appear in 30 CPC subclasses total.
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.

How to use this portfolio

China's 26 grants land it in the top 12% by Innovation Score, but volume alone doesn't tell you where the strength sits.

  • Read that count against the largest US assignees before treating it as dominance - China ranks #11,602 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in E21B - see who else leads that technology area. E21B leaders
  • Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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

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.