Granted Patent
Utility
US 4,535,188 · App. 06/420,077
Conversion of isobutane to methacrolein
Inventor:
Sargis Khoobiar
Patented Case
View Patent ↗
Granted: Aug 13, 1985
Filed: Sep 20, 1982
Inventor
Sargis Khoobiar
Assignee (at issue)
The Halcon SD Group, Inc.
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.