USPTO 2015–2025 USPTO PatentsView Foreign Corporation

SK Chemicals Co., Ltd.

USPTO PatentsView assignee record - 136 granted patents across 45 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: C08G (MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team · May 15, 2026

Explore the portfolio See the ranking

136

Total patents granted

CPC technology areas

10.2

Avg claims per patent

-21%

5-year filing velocity

The verdict

SK holds 136 US patents across 45 technology areas, rank #2,831 of 50,000 tracked assignees.

#2,831
of 50,000 US assignees by volume: Top 5%
by Innovation Score (57.7/100): 10.2
avg claims per patent: -21%
filing velocity, last 5 yrs

Portfolio overview

SK Chemicals Co., Ltd. has been granted 136 US utility patents between 2015 and 2025, placing SK Chemicals Co., Ltd. at rank #2,831 across all assignees tracked by PlainPatent. This portfolio spans 45 distinct Cooperative Patent Classification (CPC) subclasses, averaging 10.2 claims per patent with primary concentration in C08G (MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS). As a Foreign Corporation, SK Chemicals Co., Ltd. is one of the more focused assignees in the PatentsView dataset. By volume, SK sits between NOF Corporation (136 patents, rank #2,827) and Baylor University (135 patents, rank #2,835) - the closest US assignees by grant volume. The composite Innovation Score of 57.7/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 60 grants, compared with 76 in the 2015–2019 window, a -21% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. SK Chemicals Co., Ltd.'s 10.2 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a multi-domain presence across 45 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark SK Chemicals Co., Ltd. against peers pursuing similar technology classes.

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.

SK's Innovation Score vs. every tracked assignee

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

58 Top 5% higher than 95% of 50,000 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%
2025	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

Patent Moat Analysis

Portfolio Volume Moderate

Tech Breadth Multi-domain

Claim Depth Simple

Velocity Declining

Where it ranks

Overall rank by patents

#2,831

Across all tracked assignees

Innovation Score

57.7 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does SK Chemicals Co., Ltd. hold?

SK Chemicals Co., Ltd. holds 136 US granted patents filed 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. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

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. The company has filed patents in 45 CPC subclasses total.

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

SK Chemicals Co., Ltd.'s recent filing velocity is -21% compared to the prior five-year period. Filing 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 relatively simple claim structure, typical for focused inventions.

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.

How to use this portfolio

SK's 136 grants land it in the top 5% 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 - SK ranks #2,831 of 50,000. Top 50 holders
Most of this portfolio concentrates in C08G - see who else leads that technology area. C08G 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 Editorial

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 byPlainPatent Editorial, US Patent Intelligence Editorial Team · 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.