Granted Patent
Utility
US 4,537,998 · App. 06/639,765
Process for the oxidation of isobutylene oxide to methacrolein
Inventors:
Wilfred P. Shum, John F. White, Eva M. Beals
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Aug 13, 1984
Inventors
Wilfred P. Shum
John F. White
Eva M. Beals
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.