Where does SK Chemicals Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), SK Chemicals Co., Ltd. ranks #2,832 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 SK Chemicals Co., Ltd. hold?

SK Chemicals Co., Ltd. holds 136 US utility patents granted between 2015 and 2025, spanning 45 technology areas.

What is SK Chemicals Co., Ltd.'s Innovation Score?

SK Chemicals Co., Ltd. has an Innovation Score of 57.7 out of 100 (top 5% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

Is SK Chemicals Co., Ltd.'s patent grant rate increasing or decreasing?

SK Chemicals Co., Ltd.'s recent grant velocity is -34% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for SK Chemicals Co., Ltd.'s patents?

SK Chemicals Co., Ltd.'s patents average 10.2 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 SK Chemicals 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

SK Chemicals Co., Ltd.

Q: What technology areas does SK Chemicals Co., Ltd. focus on?

SK Chemicals Co., Ltd.'s top technology area is C08G (Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds) with 80 patents, ranking #47 of 1,741 assignees active in that subclass. Grants appear in 45 CPC subclasses total.

USPTO PatentsView assignee record - 136 granted patents across 45 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: C08G (Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, SK ranks #2,832 of 49,997 tracked US assignees by granted-patent volume, with 136 patents across 45 technology areas.

#2,832
of 49,997 US assignees by volume: Top 5%
by Innovation Score (57.7/100): 10.2
avg claims per patent: -34%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R2832 · Foreign Corporation #2,832 · 136 grants

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

GRANTS-MID 136 grants
TOP-DECILE #2,832/49,997
PHOTO-FINISH NOF
CPC-WIDE C08G · 45 areas
INNOV-PAR 57.7/100
CLAIMS-PAR 10.2 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DOWN -34% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: NOF Corporation (±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 SK’s 57.7 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 (29%) Velocity 10.9 pts (19%) Breadth 23.7 pts (41%) Claim depth 6.1 pts (11%)

Qualcomm Incorporated · highest

85
Embark Trucks · near

58
Micro Motion · near

58
SK Chemicals · this assignee

58
Stats ChipPAC Pte · near

58
Zurn Industries · near

58
3D Lighting… · lowest

7

What this shows SK's Innovation Score is 57.7/100 (top 5% 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 SK?

Each dot is one of SK’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). SK’s own 10.2 claims/patent is at or below the 13.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where SK's grants concentrate

SK Chemicals Co., Ltd. is a focused PatentsView assignee: 45 CPC subclasses with 58.8% of grants classified under C08G (Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds). Peak complete grant year is 2015 (18 grants) versus a trough of 5 in 2021. By volume, SK sits between NOF Corporation and Baylor University.

SK's three-year grant acceleration

From 2019–2021 to 2022–2024, SK Chemicals Co., Ltd. moved from 22 to 36 grants (1.64x 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 #355. See the growth leaderboard.

NOF

136
Parade

136
Playnitride Displ…

136
Shell USA

136
Syracuse Universi…

136
Sion Power

136
Taiho Pharmaceuti…

136
SK Chemicals ◀

136
Baylor University

135

What this shows SK holds 136 patents at rank #2,831, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near SK

By rank, the assignees closest to #2,831 in granted patent volume.

Leaders in C08G (Macromolecular Compounds Obtained Otherwise Than BY React…)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for SK, neither rank-band nor same-CPC leaders (those blocks stay above). In C08G (Macromolecular Compounds Obtained Otherwise Than BY React…), SK ranks #47 of 1,741 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (58 here).

Zurn Industries, LLC 58 Micro Motion, Inc. 58 Stats ChipPAC Pte. Ltd. 58 Embark Trucks, Inc. 58

Similar claim depth

Nearest assignees by average claims per patent (10.2 here).

Amogreentech Co., Ltd. 10.2 avg Foxlink Image Technology Co., Ltd. 10.2 avg Honda Motor Co., Ltd. 10.2 avg Breville Pty Limited 10.2 avg

SK's Innovation Score vs. every tracked assignee

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

58 Top 5% higher than 95% 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

SK Chemicals Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	18	13.2%
2016	15	11.0%
2017	18	13.2%
2018	17	12.5%
2019	8	5.9%
2020	9	6.6%
2021	5	3.7%
2022	13	9.6%
2023	7	5.1%
2024	16	11.8%
2025partial year	10	7.4%

Which technologies does SK Chemicals Co., Ltd. patent most?

C08G - Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds 80

C08L - Compositions OF Macromolecular Compounds 38

C08J - WORKING-UP; General Processes OF COMPOUNDING; After-treatment NOT Covered BY Subclasses C08b, C08c, C08f, C08g or C08h 25

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 22

B29K - Indexing Scheme Associated With Subclasses B29b, B29c OR B29d, Relating TO Moulding Materials OR TO Materials FOR ; Moulds, ; Reinforcements, Fillers OR Preformed Parts, e.g. Inserts 20

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 19

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 18

C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients 17

C07C - Acyclic OR Carbocyclic Compounds 15

B29L - Indexing Scheme Associated With Subclass B29c, Relating TO Particular Articles 12

B01J - Chemical OR Physical Processes, e.g. Catalysis OR Colloid CHEMISTRY; Their Relevant Apparatus 10

B32B - Layered Products, i.e. Products Built-up OF Strata OF Flat OR Non-flat, e.g. Cellular OR Honeycomb, Form 8

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

C07D - Heterocyclic Compounds 7

Y02W - Climate Change Mitigation Technologies Related TO Wastewater Treatment OR Waste Management 7

Top 15 of 45 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

SK Chemicals Co., Ltd.'s patent record in context - here's where to go next.

SK Chemicals Co., Ltd.'s lead technology class is C08G (Macromolecular Compounds Obtained Otherwise Than BY Reactions Only Involving Unsaturated Carbon-to-carbon Bonds), 58.8% of its portfolio - see every assignee active in that class. Explore C08G
Ranked #2,832 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare SK Chemicals Co., Ltd. against NOF Corporation, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 57.7/100 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.