Granted Patent
Utility
US 4,369,141 · App. 06/295,951
Process to improve isocyanate yield upon pyrolysis of a polyfunctional urethane which has been extracted with a combination of hydrochloric acid and alcohol
Inventor:
John F. Motier
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Aug 24, 1981
Inventor
John F. Motier
Assignee (at issue)
Atlantic Richfield Company
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.