logo

For the Inventor, By the Inventor

Wayne, NJ, United States of America

Kou-Chang Liu

This inventor holds 57 USPTO granted patents, primarily in Polymer Chemistry (CPC class 4302). Top assignees: Isp Investments Inc., Gaf Corporation, Gaf Chemicals Corporation. Active years: 1984-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kou-Chang Liu. Retrieved from https://idiyas.com/inventor/kou-chang-liu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 57

% Patents Active = 100.0

Average Co-Inventor Count = 1.5

ph-index = 8

Forward Citations = 229(Granted Patents)

Forward Citations (Not Self Cited) = 219(Dec 10, 2025)


Inventors with similar research interests:


Company Filing History:

goldMedal36 out of 740 
 
Isp Investments Inc.
 patents
silverMedal12 out of 498 
 
Gaf Corporation
 patents
bronzeMedal8 out of 83 
 
Gaf Chemicals Corporation
 patents
4. 1 out of 140 
 
Helene Curtis, Inc.
 patents
5. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1984-2001

Loading Chart...
Areas of Expertise:
Hair Care Products
Terpolymers
Vinyl Ether
Polymerization
Sunscreen Concentrate
Low VOC Compositions
Imaging Processes
Thermochromic Ethers
Copolymers
Protective Coatings
Personal Care Composition
Polyurethane Elastomers
57 patents (USPTO):Explore Patents
1. 6299866 - Water-based, hair care products containing homogeneous terpolymers having both hair styling and conditioning properties (2001-10-09),
2. 6207778 - Conditioning/styling terpolymers (2001-03-27),
3. 6193961 - Personal care composition containing a homogeneous terpolymer of an n-vinyl lactam and a polysiloxane (2001-02-27),
4. 6136934 - Process for making substantially homogeneous polymers (2000-10-24),
5. 6110454 - Process for making substantially homogeneous copolymers of vinyl (2000-08-29),
6. 5997855 - Personal care composition containing a clear homogeneous polymer of an (1999-12-07),
7. 5916544 - Sunscreen concentrate (1999-06-29),
8. 5844041 - Process for increasing the viscosity of aqueous solutions of homogeneous (1998-12-01),
9. 5830964 - Vinyl pyrrolidone polymers substantially free of vinyl lactam monomers (1998-11-03),
10. 5626836 - Low VOC hair spray compositions containing terpolymers of vinyl (1997-05-06),
11. 5609865 - Substantially homogeneous copolymers of vinyl pyrrolidone and (1997-03-11),
12. 5603919 - Low VOC hair spray fixative compositions containing a tetramer (1997-02-18),
13. 5523369 - Homogeneous polymerization process for making substantially homogeneous (1996-06-04),
14. 5492988 - Homogeneous polymerization process for making substantially homogeneous (1996-02-20),
15. 5215870 - Process of forming a permanent yellow imaged light modulating film (1993-06-01),

Title: Kou-Chang Liu: Innovator Extraordinaire in Hair Care Products

Introduction:

In the realm of hair care, few names have made as significant contributions as Kou-Chang Liu. With a plethora of patents to his name and a remarkable career in the field, Liu has revolutionized the way we care for our hair. This article showcases the latest patents, career highlights, collaborations, and a glimpse into the mind of this remarkable inventor.

Latest Patents:

Kou-Chang Liu has demonstrated his expertise in the development of water-based, hair care products that offer both styling and conditioning properties. His most recent patents highlight the formulation of homogeneous terpolymers that deliver exceptional hair care benefits. Specifically, the patents focus on water-based solutions containing terpolymers composed of vinylpyrrolidone (VP), dimethylaminopropyl methacrylamide (DMAPMA), and quaternized monomers of C,-C,alkyl dimethylaminopropyl methacrylic acid (QDMAPMA). The innovative compositions enable hair and skin care products with low tackiness and improved humidity resistance, setting new standards in the industry.

Career Highlights:

Kou-Chang Liu has had a distinguished career working with prominent companies such as ISP Investments Inc. and GAF Corporation. Throughout his professional journey, Liu has amassed an impressive portfolio of 57 patents, showcasing his innovative prowess in the hair care industry. His deep understanding of hair chemistry and his ability to develop novel formulations have not only revitalized consumer experiences but also set industry benchmarks for excellence.

Collaborations:

In his quest for excellence, Kou-Chang Liu has collaborated with renowned professionals in the field of hair care. Notably, he has worked closely with Fulvio J Vara and James A Dougherty, both of whom have made significant contributions alongside Liu. Their combined expertise has propelled the development of cutting-edge hair care products that cater to the diverse needs of consumers worldwide.

Conclusion:

Kou-Chang Liu's illustrious career is a testament to his unwavering dedication and passion for innovation in the hair care industry. His patents, particularly in the realm of water-based, conditioning/styling terpolymers, have transformed the way we approach hair care. Through collaborations and his invaluable experience with companies like ISP Investments Inc. and GAF Corporation, Liu has cemented his status as an esteemed figure in the field. As the hair care industry continues to evolve, we eagerly anticipate more groundbreaking inventions from the illustrious mind of Kou-Chang Liu.

For more information about this inventor and other exciting innovations, please visit our website, iDIYAS.com.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…