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For the Inventor, By the Inventor

Houston, TX, United States of America

David J St Clair

This inventor holds 93 USPTO granted patents and 2 published patent applications and 1 EPO patent, primarily in Block Copolymer Compositions (CPC class 525 98). Top assignees: Shell Oil Comapny, Kraton Polymers U.S. LLC, Other. Active years: 1976-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: David J St Clair. Retrieved from https://idiyas.com/inventor/david-j-st-clair

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

USPTO Granted Patents = 93 

% Patents Active = 98.9


Average Co-Inventor Count = 1.8

ph-index = 20

Forward Citations = 1,450(Granted Patents)

Forward Citations (Not Self Cited) = 1,368(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Torrance, CA (US) (1976)
  • Bethalto, IL (US) (1976)
  • Houston, TX (US) (1977 - 2011)

Company Filing History:

goldMedal77 out of 7,646 
 
Shell Oil Comapny
 patents
silverMedal15 out of 186 
 
Kraton Polymers U.S. LLC
 patents
bronzeMedal1 out of 834,570 
Other
 patents

Years Active: 1976-2011

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Areas of Expertise:
Block Copolymers
Polyurethane Compositions
Adhesives
Gels
Thermoplastic
Crosslinkable
Viscosity Index Improver
Functionalized Polymers
Photopolymerizable
Waterborne Dispersions
Pressure Sensitive
Resilient Foams
93 patents (USPTO):Explore Patents
1. 7994256 - Gel compositions (2011-08-09),
2. 7625967 - Oil gels of controlled distribution block copolymers and ester oils (2009-12-01),
3. 7625851 - Viscosity index improver for lubricating oils (2009-12-01),
4. 7560503 - Gels from high molecular weight block copolymers (2009-07-14),
5. 7297741 - Pressure sensitive adhesives from high molecular weight block copolymers having a high fraction of diblock copolymer (2007-11-20),
6. 7241540 - Photocurable compositions and flexographic printing plates comprising the same (2007-07-10),
7. RE39617 - Butadiene polymers having terminal functional groups (2007-05-07),
8. RE39559 - Butadiene polymers having terminal functional groups (2007-04-09),
9. 7166672 - Gels from silane-coupled block copolymers (2007-01-23),
10. 7141621 - Gels from controlled distribution block copolymers (2006-11-28),
11. 7012118 - Photopolymerizable compositions and flexographic plates prepared from controlled distribution block copolymers (2006-03-14),
12. 6987142 - Adhesives and sealants from controlled distribution block copolymers (2006-01-17),
13. 6653408 - Compositions comprising a functionalized block copolymer crosslinked with aluminum acetylacetonate (2003-11-25),
14. 6525142 - Monohydroxylated diene polymers and epoxidized derivatives thereof (2003-02-25),
15. 6388010 - Polyurethane compositions made from hydroxy-terminated polydiene polymers (2002-05-14),

Title: The Innovative World of David J St Clair: Pioneering Gel Compositions and Lubricating Oil Improvements

Introduction:

David J St Clair, a prolific inventor based in Houston, TX, has made significant contributions to the field of materials science and lubrication technology. With an impressive portfolio of 93 patents to his name, St Clair is renowned for his groundbreaking work in developing gel compositions and viscosity index improvers for lubricating oils.

Latest Patents:

Among his latest innovations are four distinct gel compositions that offer enhanced properties compared to traditional formulations. These gels, including elastosols, solid rubbery gels, UV cured gels, and chemically cured gels, are crafted from selectively hydrogenated styrene/diene block copolymers and maleated variants, showcasing St Clair's mastery in polymer chemistry.

Additionally, St Clair's development of a polymeric viscosity index improver represents a leap forward in lubrication science. By incorporating a hydrogenated block copolymer with minimized crystallinity, this novel additive enhances the viscosity index of lubricating oils, leading to improved engine performance and longevity.

Career Highlights:

Throughout his illustrious career, David J St Clair has lent his expertise to esteemed organizations such as Shell Oil Company and Kraton Polymers U.S. LLC. His tenure at these industry giants has been marked by a relentless pursuit of innovation and a dedication to pushing the boundaries of materials engineering.

Collaborations:

St Clair's collaborative spirit is evident in his partnerships with accomplished peers like James R Erickson and Robert Charles Bening. Together, they have synergized their talents to bring cutting-edge solutions to the forefront of the materials science landscape, solidifying St Clair's reputation as a collaborative innovator.

Conclusion:

In conclusion, David J St Clair stands as a visionary inventor whose pioneering work in gel compositions and lubricating oil additives has reshaped the industry. With a remarkable patent portfolio and a track record of success at top-tier companies, St Clair continues to inspire the next generation of innovators with his commitment to excellence and ingenuity.

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]
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