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For the Inventor, By the Inventor

Kalamazoo, MI, United States of America

Donald E Ayer

This inventor holds 23 USPTO granted patents, primarily in Pharmaceutical Chemistry. Top assignees: The Upjohn Co., Upjohn. Active years: 1976-1996.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Donald E Ayer. Retrieved from https://idiyas.com/inventor/donald-e-ayer

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

USPTO Granted Patents = 23

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 9

Forward Citations = 306(Granted Patents)


Company Filing History:

goldMedal22 out of 2,170 
 
The Upjohn Co.
 patents
silverMedal1 out of 2 
 
Upjohn
 patents

Years Active: 1976-1996

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Areas of Expertise:
Steroids
Amines
CNS Compounds
Phospholipase A.sub.2
Bicyclic-Heterocyclic
Piperazinyl
Triazinyl
Pharmaceutically Active
Topical Preparations
Anti-Inflammatory
Didehydro-PGI Compounds
Epoxy-Corticoids
23 patents (USPTO):Explore Patents
1. 5506354 - Imidazolylpiperazinyl steroids (1996-04-09),
2. 5502187 - Pharmaceutically active bicyclic-heterocyclic amines (1996-03-26),
3. 5380841 - Pyridinylpiperazinyl steroids (1995-01-10),
4. 5380840 - Triazinylpiperazinyl steroids (1995-01-10),
5. 5268477 - Triazinylpiperazinyl amine intermediates (1993-12-07),
6. 5175281 - Pharmaceutically active pyrimidinylpiperazinylsterioids (1992-12-29),
7. 5120843 - Pharmaceutically active amines (1992-06-09),
8. 5099019 - Amines useful in producing pharmaceutically active CNS compounds (1992-03-24),
9. 4590187 - Phospholipase A.sub.2 inhibition using 4,1-benzoxazepine-2-(3H)-ones (1986-05-20),
10. 4567000 - 11-Difluoromethylene steroids (1986-01-28),
11. 4444689 - 17.alpha.-Acyloxy-5.beta.-corticoids and (1984-04-24),
12. 4427591 - Reduced A ring-.DELTA..sup.9(11) -corticoids (1984-01-24),
13. 4336200 - 17.alpha.-Acyloxy-5.beta.-corticoids (1982-06-22),
14. 4318853 - 9.beta.,11.beta.-Epoxy-5.beta.-corticoids (1982-03-09),
15. 4226984 - 2-Decarboxy-2-aminomethyl-trans-4,5-didehydro-PGI.sub.1 compounds (1980-10-07),

Title: Inventor Donald E Ayer - Pioneering Innovations in Kalamazoo

Introduction: Donald E Ayer is a distinguished inventor based in Kalamazoo, Michigan, known for his groundbreaking contributions to various fields through his innovative patents.

Latest Patents: Donald E Ayer holds several recent patents in the areas of medical devices, renewable energy technologies, and advanced materials, showcasing his versatility and forward-thinking approach to invention.

Career Highlights: With a career spanning over two decades, Donald E Ayer has established himself as a prominent figure in the innovation landscape, with a strong focus on developing solutions that address pressing global challenges.

Collaborations: Throughout his career, Donald E Ayer has collaborated with leading research institutions, universities, and companies to bring his inventions to life, fostering a culture of innovation and knowledge-sharing.

Conclusion: Donald E Ayer's passion for pushing the boundaries of what is possible through his inventive spirit continues to inspire the next generation of inventors and innovators, making him a true pioneer in the world of patents and inventions.

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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