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

According to USPTO PatentsView (2015–2025 granted utility patents), SK Energy Co., Ltd. ranks #14,277 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 Energy Co., Ltd. hold?

SK Energy Co., Ltd. holds 21 US utility patents granted between 2015 and 2022, spanning 35 technology areas.

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

SK Energy Co., Ltd. has an Innovation Score of 42.2 out of 100 (top 31% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

SK Energy Co., Ltd.'s recent grant velocity is -76% 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 Energy Co., Ltd.'s patents?

SK Energy Co., Ltd.'s patents average 12.1 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 Energy 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 Energy Co., Ltd.

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

SK Energy Co., Ltd.'s top technology area is 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) with 9 patents, ranking #129 of 504 assignees active in that subclass. Grants appear in 35 CPC subclasses total.

USPTO PatentsView assignee record - 21 granted patents across 35 technology areas, recorded in grant years 2015–2022. 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: 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 GAS).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, SK ranks #14,277 of 49,997 tracked US assignees by granted-patent volume, with 21 patents across 35 technology areas.

#14,277
of 49,997 US assignees by volume: Top 31%
by Innovation Score (42.2/100): 12.1
avg claims per patent: -76%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R14277 · Foreign Corporation #14,277 · 21 grants

GRANTS-SMALL · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-RICH · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 21 grants
MID-PACK #14,277/49,997
PHOTO-FINISH Sichuan Sunfor Light
CPC-FOCUS C10G · 35 areas
INNOV-PAR 42.2/100
CLAIMS-RICH 12.1 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -76% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Sichuan Sunfor Light 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 SK’s 42.2 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 10.7 pts (25%) Velocity 3.3 pts (8%) Breadth 20.9 pts (50%) Claim depth 7.3 pts (17%)

Qualcomm Incorporated · highest

85
SK Energy · this assignee

42
3D Lighting… · lowest

7

What this shows SK's Innovation Score is 42.2/100 (top 31% 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 12.1 claims/patent is at or below the 14.4 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 Energy Co., Ltd. is a focused PatentsView assignee: 35 CPC subclasses with 42.9% of grants classified under 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 GAS). Peak complete grant year is 2018 (6 grants) versus a trough of 1 in 2020. By volume, SK sits between Sichuan Sunfor Light Co., Ltd and Smith & Fong Co..

SK's three-year grant acceleration

SK Energy Co., Ltd. shows 2 grants in 2022–2024 against only 4 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.

Sichuan Sunfor Li…

21
Sicoya

21
Sigma Labs

21
Silicon Display T…

21
Skeletal Dynamics

21
Skis Rossignol

21
Smartflow

21
Smith & Fong

21
SK Energy ◀

21

What this shows SK holds 21 patents at rank #14,261, 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 #14,261 in granted patent volume.

Leaders in C10G (Cracking Hydrocarbon OILS)

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, grant velocity, technology breadth, and claim depth (0–100)

42 Top 31% higher than 69% 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 · 2015–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

SK Energy Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	4	19.0%
2016	2	9.5%
2017	3	14.3%
2018	6	28.6%
2019	2	9.5%
2020	1	4.8%
2021	1	4.8%
2022	2	9.5%

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

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 9

C10L - Fuels NOT Otherwise Provided FOR; Natural GAS; Synthetic Natural GAS Obtained BY Processes NOT Covered BY Subclasses C10g OR C10K; Liquified Petroleum GAS; USE OF Additives TO Fuels OR FIRES; Fire-lighters 8

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 7

C10J - Production OF Producer GAS, Water-gas, Synthesis GAS From Solid Carbonaceous Material, OR Mixtures Containing These Gases ; Carburetting AIR OR Other Gases 5

F26B - Drying Solid Materials OR Objects BY Removing Liquid Therefrom 4

B01D - Separation 4

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 3

G01N - Investigating OR Analysing Materials BY Determining Their Chemical OR Physical Properties 3

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

C12P - Fermentation OR Enzyme-using Processes TO Synthesise A Desired Chemical Compound OR Composition OR TO Separate Optical Isomers From A Racemic Mixture 3

C10K - Purifying OR Modifying THE Chemical Composition OF Combustible Gases Containing Carbon Monoxide 2

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

C12M - Apparatus FOR Enzymology OR MICROBIOLOGY; Apparatus FOR Culturing Microorganisms FOR Producing Biomass, FOR Growing Cells OR FOR Obtaining Fermentation OR Metabolic Products, i.e. Bioreactors OR Fermenters 2

C07C - Acyclic OR Carbocyclic Compounds 2

F16N - Lubricating 1

Top 15 of 35 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 Energy Co., Ltd.'s patent record in context - here's where to go next.

SK Energy Co., Ltd.'s lead technology class is 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 GAS), 42.9% of its portfolio - see every assignee active in that class. Explore C10G
Ranked #14,277 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare SK Energy Co., Ltd. against Sichuan Sunfor Light Co., Ltd, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 42.2/100 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.