Where does China National Petroleum Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), China National Petroleum Corporation ranks #4,809 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 National Petroleum Corporation hold?

China National Petroleum Corporation holds 72 US utility patents granted between 2015 and 2025, spanning 39 technology areas.

What is China National Petroleum Corporation's Innovation Score?

China National Petroleum Corporation has an Innovation Score of 59.9 out of 100 (top 4% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is China National Petroleum Corporation's patent grant rate increasing or decreasing?

China National Petroleum Corporation's recent grant velocity is +70% 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 National Petroleum Corporation's patents?

China National Petroleum Corporation's patents average 12.3 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 National Petroleum 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 Foreign Corporation

China National Petroleum Corporation

Q: What technology areas does China National Petroleum Corporation focus on?

China National Petroleum Corporation'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 43 patents, ranking #78 of 1,363 assignees active in that subclass. Grants appear in 39 CPC subclasses total.

USPTO PatentsView assignee record - 72 granted patents across 39 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 #4,809 of 49,997 tracked US assignees by granted-patent volume, with 72 patents across 39 technology areas.

#4,809
of 49,997 US assignees by volume: Top 4%
by Innovation Score (59.9/100): 12.3
avg claims per patent: +70%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R4809 · Foreign Corporation #4,809 · 72 grants

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

GRANTS-SMALL 72 grants
TOP-DECILE #4,809/49,997
PHOTO-FINISH Beijing Microlive…
CPC-FOCUS E21B · 39 areas
INNOV-PAR 59.9/100
CLAIMS-RICH 12.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +70% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Beijing Microlive Vision 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 China’s 59.9 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 14.8 pts (25%) Velocity 15.6 pts (26%) Breadth 22.1 pts (37%) Claim depth 7.4 pts (12%)

Qualcomm Incorporated · highest

85
China National… · this assignee

60
Emerson Climate · near

60
Ordos Yuansheng… · near

60
PPC Broadband · near

60
Mississippi State… · near

60
3D Lighting… · lowest

7

What this shows China's Innovation Score is 59.9/100 (top 4% 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 12.3 claims/patent is at or below the 16.3 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 National Petroleum Corporation is a focused PatentsView assignee: 39 CPC subclasses with 59.7% 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 2024 (17 grants) versus a trough of 2 in 2017. By volume, China sits between Blue River Technology Inc. and Dassault Systemes Simulia Corp..

China's three-year grant acceleration

China National Petroleum Corporation shows 28 grants in 2022–2024 against only 12 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.

Blue River Techno…

72
Beijing Microlive…

72
Cameron Health

72
Clean Power Resea…

72
Connaught

72
Daewoo Shipbuildi…

72
DP

72
Dassault Systemes…

72
China National Pe… ◀

72

What this shows China holds 72 patents at rank #4,810, 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 #4,810 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 #78 of 1,363 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (60 here).

Emerson Climate Technologies, Inc. 60 PPC Broadband, Inc. 60 Ordos Yuansheng Optoelectronics Co., Ltd. 60 Mississippi State University 60

Similar claim depth

Nearest assignees by average claims per patent (12.3 here).

Koki Holdings Co., Ltd. 12.3 avg KIA Motors Corporation 12.3 avg Traeger Pellet Grills, LLC 12.3 avg Bunn-O-Matic Corporation 12.3 avg

China's Innovation Score vs. every tracked assignee

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

60 Top 4% higher than 96% 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 National Petroleum Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	5.6%
2016	3	4.2%
2017	2	2.8%
2018	5	6.9%
2019	6	8.3%
2020	3	4.2%
2021	3	4.2%
2022	3	4.2%
2023	8	11.1%
2024	17	23.6%
2025partial year	18	25.0%

Which technologies does China National Petroleum Corporation patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 43

C09K - Materials FOR Miscellaneous Applications, NOT Provided FOR Elsewhere 25

G01V - GEOPHYSICS; Gravitational MEASUREMENTS; Detecting Masses OR OBJECTS; Tags 13

C08L - Compositions OF Macromolecular Compounds 5

C04B - Lime, MAGNESIA; SLAG; CEMENTS; Compositions Thereof, e.g. Mortars, Concrete OR Like Building MATERIALS; Artificial Stone ; Ceramics ; REFRACTORIES; Treatment OF Natural Stone 5

F16L - PIPES; Joints OR Fittings FOR PIPES; Supports FOR Pipes, Cables OR Protective TUBING; Means FOR Thermal Insulation IN General 4

Y10T - Technical Subjects Covered BY Former US Classification 4

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 4

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 3

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 3

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 2

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 2

H01Q - Antennas, i.e. Radio Aerials 2

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 2

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

Top 15 of 39 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 National Petroleum Corporation's patent record in context - here's where to go next.

China National Petroleum Corporation'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), 59.7% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #4,809 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare China National Petroleum Corporation against Blue River Technology Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 59.9/100 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.