% Expired Patents = 100.0

Trademarks = 4

Forward Citations = 1

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3 inventors (with patents filed for the assignee):

Robert Yost (2 out of 3 patents)

James P Lavelle (1 out of 1 patent)

Umar M Khokhar (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 8999191 - R22 replacement refrigerant (2015-04-07),

2. 8402778 - Method for enhancing mineral oil miscibility and oil return (2013-03-26),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#302 in Philadelphia, PA

#3,428 in Pennsylvania

#94,905 in US

Philadelphia, PA, United States of America

National Refrigerants, Inc.

Forward Citations = 1

3 inventors:

Robert Yost (2 out of 3 patents)

James P Lavelle (1 out of 1 patent)

Umar M Khokhar (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: National Refrigerants, Inc.. Retrieved from https://idiyas.com/company/national-refrigerants

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]