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For the Inventor, By the Inventor

Seoul, South Korea

Sk Corporation


USPTO Granted Patents = 63

% Expired Patents = 27.0



Trademarks = 97

Forward Citations = 609

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175 inventors (with patents filed for the assignee):

goldMedal Sun Woong Choi (8 out of 32 patents)

silverMedal Yong Moon Choi (6 out of 18 patents)

bronzeMedal Byong-Sung Kwak (4 out of 6 patents)

4.  Jun-Seong Ahn (4 out of 4 patents)

5.  Sang-Ho Lee (4 out of 7 patents)

6.  Cheol Woo Kim (3 out of 27 patents)

7.  Jin Kyung Jo (3 out of 9 patents)

8.  Young Bom Kim (3 out of 9 patents)

9.  Jong Hyung Lee (3 out of 7 patents)

10.  Jong-Ho Lim (3 out of 4 patents)

11.  Wha-Sik Min (3 out of 4 patents)

12.  Kyoung Hak Sung (3 out of 3 patents)

13.  Sam-Ryong Park (3 out of 3 patents)

14.  Yong-Moon Choi (3 out of 3 patents)

15.  Seung-Hoon Oh (3 out of 3 patents)


Core Competencies:
Organic Electroluminescent Device
Etching Composition
Semiconductor Manufacturing
Hydrocarbon Processing
Catalyst Systems
Telematics Service
Optically Pure Compounds
Aromatic Hydrocarbons
Transnasal Compositions
Cleaning Agents
Polypropylene Films
Nitrogen Oxides Reduction

63 patents:

1. 12415949 - Compound, organic electroluminescent device, and display device (2025-09-16),
2. 12146092 - Etching composition, method for etching insulating film of semiconductor devices using the same and method for preparing semiconductor devices (2024-11-19),
3. 12116520 - Composition for etching, method for etching insulator and method for manufacturing semiconductor device, and novel compounds (2024-10-15),
4. 11365350 - Silane compound (2022-06-21),
5. 7974776 - System and method for providing origin and destination guide information (2011-07-05),
6. 7860645 - System and method for providing telematics service (2010-12-28),
7. 7589042 - Arylphenoxy catalyst system for producing ethylene homopolymer or copolymers of ethylene and α-olefins (2009-09-15),
8. 7405070 - Method for preparing (s)-indoline-2-carboxylic acid and (s)-indoline-2-carboxylic acid methyl ester using hydrolytic enzyme (2008-07-29),
9. 7361328 - Method of preparing ZSM-5 using variable temperature without organic template (2008-04-22),
10. 7332531 - Microporous high density polyethylene film (2008-02-19),
11. 7304195 - Process for increasing production of benzene from hydrocarbon mixture (2007-12-04),
12. 7301063 - Process for increasing production of light olefin hydrocarbon from hydrocarbon feedstock (2007-11-27),
13. 7297831 - Process of preparing aromatic hydrocarbons and liquefied petroleum gas from hydrocarbon mixture (2007-11-20),
14. 7214793 - Method of preparing 10H-dibenzo[b,f][11,4]thiazepin-11-one (2007-05-08),
15. 7189289 - Cleaning agent and method for cleaning heater tubes (2007-03-13),
SK Corporation, headquartered in Seoul, South Korea, is a prominent player in the semiconductor devices sector. The company specializes in the development and manufacturing of advanced technologies, including organic electroluminescent devices and etching compositions. Its expertise extends to semiconductor manufacturing processes, hydrocarbon processing, and catalyst systems, positioning it as a leader in innovation. Additionally, SK Corporation is involved in telematics services and the production of optically pure compounds and aromatic hydrocarbons, contributing significantly to various industrial applications.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Sk Corporation
63 Patents

#111 in Seoul

#270 in South Korea

#11,611 in the World

Seoul, KR
Seoul, South Korea

Sk Corporation

Forward Citations = 609

175 inventors:

goldMedal Sun Woong Choi (8 out of 32 patents)

silverMedal Yong Moon Choi (6 out of 18 patents)

bronzeMedal Byong-Sung Kwak (4 out of 6 patents)

4.  Jun-Seong Ahn (4 out of 4 patents)

5.  Sang-Ho Lee (4 out of 7 patents)

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