Where does PetroChina Company Limited rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), PetroChina Company Limited ranks #2,848 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 PetroChina Company Limited hold?

PetroChina Company Limited holds 135 US utility patents granted between 2015 and 2025, spanning 49 technology areas.

What is PetroChina Company Limited's Innovation Score?

PetroChina Company Limited has an Innovation Score of 53.1 out of 100 (top 9% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is PetroChina Company Limited's patent grant rate increasing or decreasing?

PetroChina Company Limited's recent grant velocity is +153% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for PetroChina Company Limited's patents?

PetroChina Company Limited's patents average 13.5 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 PetroChina Company Limited 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

PetroChina Company Limited

Q: What technology areas does PetroChina Company Limited focus on?

PetroChina Company Limited'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 50 patents, ranking #71 of 1,363 assignees active in that subclass. Grants appear in 49 CPC subclasses total.

USPTO PatentsView assignee record - 135 granted patents across 49 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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The verdict

According to USPTO PatentsView, Petrochina ranks #2,848 of 49,997 tracked US assignees by granted-patent volume, with 135 patents across 49 technology areas.

#2,848
of 49,997 US assignees by volume: Top 9%
by Innovation Score (53.1/100): 13.5
avg claims per patent: +153%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2848 · Foreign Corporation #2,848 · 135 grants

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

GRANTS-MID 135 grants
TOP-DECILE #2,848/49,997
PHOTO-FINISH Metra
CPC-WIDE E21B · 49 areas
INNOV-PAR 53.1/100
CLAIMS-RICH 13.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +153% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Metra Electronics Corp. (±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 Petrochina’s 53.1 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 17.0 pts (32%) Velocity 3.3 pts (6%) Breadth 24.7 pts (47%) Claim depth 8.1 pts (15%)

Qualcomm Incorporated · highest

85
Automotive Research… · near

53
European Space Agency · near

53
Kennametal India · near

53
PetroChina · this assignee

53
National University… · near

53
3D Lighting… · lowest

7

What this shows Petrochina's Innovation Score is 53.1/100 (top 9% 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 Petrochina?

Each dot is one of Petrochina’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). Petrochina’s own 13.5 claims/patent is ABOVE the 4.4 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Petrochina's grants concentrate

PetroChina Company Limited is a focused PatentsView assignee: 49 CPC subclasses with 37% 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 2021 (38 grants) versus a trough of 2 in 2015. By volume, Petrochina sits between Metra Electronics Corp. and Suntory Flowers Limited.

Petrochina's three-year grant acceleration

From 2019–2021 to 2022–2024, PetroChina Company Limited moved from 68 to 34 grants (0.50x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,702. See the growth leaderboard.

Metra

135
Meyer Intellectua…

135
Nissei ASB Machine

135
Omnitek Partners

135
RH US

135
Sanechips Technol…

135
Spine Wave

135
Suntory Flowers

135
Petrochina ◀

135

What this shows PetroChina holds 135 patents at rank #2,848, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near PetroChina

By rank, the assignees closest to #2,848 in granted patent volume.

Leaders in E21B (Earth OR Rock Drilling)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for PetroChina, neither rank-band nor same-CPC leaders (those blocks stay above). In E21B (Earth OR Rock Drilling), PetroChina ranks #71 of 1,363 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (53 here).

Automotive Research & Testing Center 53 European Space Agency 53 Kennametal India Ltd. 53 National University Corporation Chiba University 53

Similar claim depth

Nearest assignees by average claims per patent (13.5 here).

Ricoh Imaging Company, Ltd. 13.5 avg Thyssenkrupp Presta Teccenter AG 13.5 avg Deciphera Pharmaceuticals, LLC 13.5 avg Himax Display, Inc. 13.5 avg

Petrochina's Innovation Score vs. every tracked assignee

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

53 Top 9% higher than 91% 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

PetroChina Company Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	1.5%
2016	9	6.7%
2017	12	8.9%
2018	9	6.7%
2019	6	4.4%
2020	24	17.8%
2021	38	28.1%
2022	19	14.1%
2023	6	4.4%
2024	9	6.7%
2025partial year	1	0.7%

Which technologies does PetroChina Company Limited patent most?

E21B - Earth OR Rock DRILLING; Obtaining OIL, GAS, Water, Soluble OR Meltable Materials OR A Slurry OF Minerals From Wells 50

G01V - GEOPHYSICS; Gravitational MEASUREMENTS; Detecting Masses OR OBJECTS; Tags 30

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 28

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 28

C09K - Materials FOR Miscellaneous Applications, NOT Provided FOR Elsewhere 20

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 19

C01B - Non-metallic ELEMENTS; Compounds THEREOF; ; Metalloids OR Compounds Thereof NOT Covered BY Subclass C01c 12

C07C - Acyclic OR Carbocyclic Compounds 11

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 9

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 8

C01P - Indexing Scheme Relating TO Structural AND Physical Aspects OF Solid Inorganic Compounds 7

G06F - Electric Digital Data Processing 6

B01F - Mixing, e.g. Dissolving, Emulsifying OR Dispersing 5

G06V - Image OR Video Recognition OR Understanding 5

C10M - Lubricating Compositions ; USE OF Chemical Substances Either Alone OR AS Lubricating Ingredients IN A Lubricating Composition 4

Top 15 of 49 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

PetroChina Company Limited's patent record in context - here's where to go next.

PetroChina Company Limited'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), 37% of its portfolio - see every assignee active in that class. Explore E21B
Ranked #2,848 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare PetroChina Company Limited against Metra Electronics Corp., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 53.1/100 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.