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For the Inventor, By the Inventor

Northfield, OH, United States of America

Dwight W Chasar

This inventor holds 22 USPTO granted patents, primarily in Rubber Chemistry. Top assignee: The B. F. Goodrich Company. Active years: 1977-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Dwight W Chasar. Retrieved from https://idiyas.com/inventor/dwight-w-chasar

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

USPTO Granted Patents = 22

% Patents Active = 100.0

Average Co-Inventor Count = 1.1

ph-index = 6

Forward Citations = 97(Granted Patents)


Company Filing History:

goldMedal22 out of 1,484 
 
The B. F. Goodrich Company
 patents

Years Active: 1977-1996

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Areas of Expertise:
Nitrosamines
Vulcanization
Phosphoramidites
Stabilizers
Oligomers
Phosphites
Cyclic Phosphonates
Polyolefins
Hydrocarbonthio
Levulinic Acid
Phenoxy Compounds
Catechol
22 patents (USPTO):Explore Patents
1. 5554699 - Method of curing rubbers without forming nitrosamines (1996-09-10),
2. 5070130 - Alkaline earth oxides and hydroxides to reduce nitrosamine formation (1991-12-03),
3. 4866138 - Vulcanization accelerators (1989-09-12),
4. 4590017 - 2,4-bis-(2,6-di-t-alkyl-4-substituted-phenoxy)-1 (1986-05-20),
5. 4584146 - Tetrakis(2,6-di-t-butyl-4-substituted phenyl)4,4'-bisphenyl diphosphites (1986-04-22),
6. 4529533 - Substituted 2-(2,6-di-t-butly-4-alkylphenoxy) (1985-07-16),
7. 4522735 - Polyphosphoramidite oligomers and stabilizer compositions thereof (1985-06-11),
8. 4520151 - Tris (3,6-di-t-butyl-2-naphthyl) phosphite and compositions thereof (1985-05-28),
9. 4515733 - Method for making 1,3,5,2,4,6-trioxatriphosphorinanes (1985-05-07),
10. 4507416 - 2,4,6-Tris(substituted phenoxy)-1,3,5,2,4,6-trioxatriphosphorinanes as (1985-03-26),
11. 4501684 - 2-Naphthyl phosphoramidites and compositions thereof (1985-02-26),
12. 4495320 - 3,6-Di-t-butyl-2-naphthyl catechol phosphite and compositions thereof (1985-01-22),
13. 4439564 - 5-Membered cyclic phosphonates and compositions thereof (1984-03-27),
14. 4434265 - Metacyclophane, synthesis thereof, and compositions stabilized thereby (1984-02-28),
15. 4415686 - Sterically hindered phenyl bis(naphthyl)phosphites and compositions (1983-11-15),

Title: Innovations in Rubber Curing: The Work of Dwight W. Chasar

Introduction

Dwight W. Chasar, based in Northfield, Ohio, is a notable inventor with a significant impact in the field of rubber technology. With an impressive portfolio of 22 patents, his innovations primarily focus on methods to enhance rubber curing processes, particularly in reducing harmful nitrosamine formation.

Latest Patents

Chasar's recent patents include groundbreaking methodologies that allow for the curing of rubbers without creating nitrosamines. His innovative branched and cyclic N,N-dialkyldithiocarbamyl accelerators for sulfur vulcanization of rubber demonstrate comparable performance to traditional straight-chain accelerators, yet without producing undesirable environmental pollutants. The formulations he has developed are represented by complex chemical structures, showcasing the depth of his expertise in chemistry and materials science. Additionally, his work incorporates alkaline earth oxides and hydroxides to significantly lower nitrosamine levels in cured rubber compositions, achieving reductions often below 20 parts per billion.

Career Highlights

Chasar has made substantial contributions through his association with B. F. Goodrich Company, where he has applied his extensive knowledge in chemistry to advance rubber technology. His commitment to innovation is evident in the numerous patents he has secured, each contributing to safer and more environmentally friendly rubber manufacturing processes.

Collaborations

Throughout his career, Chasar has collaborated with esteemed colleagues such as Chin C. Hsu and Robert W. Layer. Working alongside these professionals, he has enhanced the scope and effectiveness of his research, leading to significant advancements in the field.

Conclusion

Dwight W. Chasar's dedication to innovation has not only resulted in 22 patents but has also paved the way for safer rubber curing practices that minimize environmental impact. His contributions continue to inspire advancements within the rubber industry, marking him as a prominent figure in the field of materials science.

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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