Granted Patent
Utility
US 4,291,183 · App. 06/116,657
Production of tertiary-butylstyrene
Inventors:
Glen F. Crum, Samuel J. Paton
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Jan 29, 1980
Inventors
Glen F. Crum
Samuel J. Paton
Assignee (at issue)
El Paso Products 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.