Where does Chang Chun Petrochemical Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Chang Chun Petrochemical Co., Ltd. ranks #3,619 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 Chang Chun Petrochemical Co., Ltd. hold?

Chang Chun Petrochemical Co., Ltd. holds 101 US utility patents granted between 2015 and 2025, spanning 60 technology areas.

What is Chang Chun Petrochemical Co., Ltd.'s Innovation Score?

Chang Chun Petrochemical Co., Ltd. has an Innovation Score of 54.5 out of 100 (top 8% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is Chang Chun Petrochemical Co., Ltd.'s patent grant rate increasing or decreasing?

Chang Chun Petrochemical Co., Ltd.'s recent grant velocity is +141% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Chang Chun Petrochemical Co., Ltd.'s patents?

Chang Chun Petrochemical Co., Ltd.'s patents average 14.8 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 Chang Chun Petrochemical Co., Ltd. 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

Chang Chun Petrochemical Co., Ltd.

Q: What technology areas does Chang Chun Petrochemical Co., Ltd. focus on?

Chang Chun Petrochemical Co., Ltd.'s top technology area is B32B (Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form) with 44 patents, ranking #100 of 3,088 assignees active in that subclass. Grants appear in 60 CPC subclasses total.

USPTO PatentsView assignee record - 101 granted patents across 60 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: B32B (Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Chang ranks #3,619 of 49,997 tracked US assignees by granted-patent volume, with 101 patents across 60 technology areas.

#3,619
of 49,997 US assignees by volume: Top 8%
by Innovation Score (54.5/100): 14.8
avg claims per patent: +141%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3619 · Foreign Corporation #3,619 · 101 grants

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

GRANTS-MID 101 grants
TOP-DECILE #3,619/49,997
PHOTO-FINISH Amsted Rail
CPC-WIDE B32B · 60 areas
INNOV-PAR 54.5/100
CLAIMS-RICH 14.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-SURGE +141% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Amsted Rail Company, Inc. (±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 Chang’s 54.5 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 16.0 pts (29%) Velocity 4.7 pts (9%) Breadth 25.0 pts (46%) Claim depth 8.9 pts (16%)

Qualcomm Incorporated · highest

85
Aisan Kogyo · near

55
Basf Mobile… · near

55
Chang Chun Petrochem… · this assignee

55
Hesai Technology · near

55
Ossur Iceland EHF · near

55
3D Lighting… · lowest

7

What this shows Chang's Innovation Score is 54.5/100 (top 8% 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 Chang?

Each dot is one of Chang’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). Chang’s own 14.8 claims/patent is ABOVE the 14.6 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

How Chang's grant cadence moved

Between 2020–2024, Chang Chun Petrochemical Co., Ltd. received 65 grants versus 27 in 2015–2019 (+141% equal-window velocity, above median growth). Across complete PatentsView years, output peaked in 2020 at 18 grants and bottomed in 2015 at 1. Lead class B32B accounts for 43.6% of the portfolio across 60 subclasses. Volume neighbours: Wabash National, L.P. (#3,615) and CuRNA, Inc. (#3,623).

Chang's three-year grant acceleration

From 2019–2021 to 2022–2024, Chang Chun Petrochemical Co., Ltd. moved from 44 to 31 grants (0.70x 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 #2,139. See the growth leaderboard.

Wabash National

102
Amsted Rail

101
Bentley Motors

101
Ceraloc Innovatio…

101
Chimei

101
Consiglio Naziona…

101
CPG

101
Curna

101
Chang Chun Petroc… ◀

101

What this shows Chang holds 101 patents at rank #3,619, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Chang

By rank, the assignees closest to #3,619 in granted patent volume.

Leaders in B32B (Layered Products)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Chang, neither rank-band nor same-CPC leaders (those blocks stay above). In B32B (Layered Products), Chang ranks #100 of 3,088 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (55 here).

Ossur Iceland EHF 55 Aisan Kogyo Kabushiki Kaisha 55 Hesai Technology Co., Ltd. 55 Basf Mobile Emissions Catalysts, LLC 55

Similar claim depth

Nearest assignees by average claims per patent (14.8 here).

Matthews International Corporation 14.8 avg Katholieke Universiteit Leuven, KU Leuven R&D 14.8 avg Etel S.A. 14.8 avg Beijing Baidu Netcom Science Technology Co., Ltd. 14.8 avg

Chang's Innovation Score vs. every tracked assignee

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

55 Top 8% higher than 92% 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

Chang Chun Petrochemical Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	1.0%
2016	5	5.0%
2017	7	6.9%
2018	4	4.0%
2019	10	9.9%
2020	18	17.8%
2021	16	15.8%
2022	11	10.9%
2023	10	9.9%
2024	10	9.9%
2025partial year	9	8.9%

Which technologies does Chang Chun Petrochemical Co., Ltd. patent most?

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 44

C25D - Processes FOR THE Electrolytic OR Electrophoretic Production OF COATINGS; ELECTROFORMING; Apparatus Therefor 43

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 40

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 33

Y10T - Technical Subjects Covered BY Former US Classification 22

C08J - WORKING-UP; General Processes OF COMPOUNDING; After-treatment NOT Covered BY Subclasses C08b, C08c, C08f, C08g or C08h 22

H05K - Printed CIRCUITS; Casings OR Constructional Details OF Electric APPARATUS; Manufacture OF Assemblages OF Electrical Components 21

C08F - Macromolecular Compounds Obtained BY Reactions Only Involving Carbon-to-carbon Unsaturated Bonds 19

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 18

C08L - Compositions OF Macromolecular Compounds 14

C12N - Microorganisms OR ENZYMES; Compositions THEREOF; Propagating, Preserving, OR Maintaining MICROORGANISMS; Mutation OR Genetic ENGINEERING; Culture Media 7

B01D - Separation 7

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 6

C12Y - Enzymes 6

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 5

Top 15 of 60 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

Chang Chun Petrochemical Co., Ltd.'s patent record in context - here's where to go next.

Chang Chun Petrochemical Co., Ltd.'s lead technology class is B32B (Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form), 43.6% of its portfolio - see every assignee active in that class. Explore B32B
Ranked #3,619 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Chang Chun Petrochemical Co., Ltd. against Wabash National, L.P., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 54.5/100 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.