Granted Patent
Utility
US 4,291,189 · App. 06/144,733
Alkylation process improvement
Inventor:
David Bruce Bishkin
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Apr 28, 1980
Inventor
David Bruce Bishkin
Assignee (at issue)
Monsanto 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.