Granted Patent
Utility
US 5,084,486 · App. 07/630,541
Reactive feed stream to replace inert blowing agent feed stream in a polyurethane foam process
Inventors:
William Patten, Keith D. Cavender, Frank E. Critchfield
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Dec 20, 1990
Inventors
William Patten
Keith D. Cavender
Frank E. Critchfield
Assignee (at issue)
Union Carbide Chemicals & Plastics Technology LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.