Cincinnati, OH, United States of America

Quantum Chemical Company

Calculating rank

USPTO Granted Patents = 2

Forward Citations = 13

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4 inventors (with patents filed for the assignee):

Stephen M Imfeld (1 out of 11 patents)

Morgan L Gibbs (1 out of 1 patent)

Douglas D Keller (1 out of 1 patent)

4. Daryl L Stein (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5574082 - Propylene polymer compositions having improved color and stabilizers (1996-11-12),

2. H001600 - High density polyethylenes with improved processing stability (1996-09-30),

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USPTO Data Jan 1 1976 - Nov 3 2026

2 Patents

#353 in Cincinnati, OH

#3,646 in Ohio

#95,021 in US

Cincinnati, OH, United States of America

Quantum Chemical Company

Forward Citations = 13

4 inventors:

Stephen M Imfeld (1 out of 11 patents)

Morgan L Gibbs (1 out of 1 patent)

Douglas D Keller (1 out of 1 patent)

4. Daryl L Stein (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Quantum Chemical Company. Retrieved from https://idiyas.com/company/quantum-chemical-company

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

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]