Granted Patent
Utility
US 4,384,985 · App. 06/345,033
Catalyst composition for producing tertiary-butylstyrene
Inventors:
Glen F. Crum, Samuel J. Paton
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Feb 2, 1982
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.