Granted Patent
Utility
US 4,374,757 · App. 05/973,354
Catalyst and process for producing methacrylic acid
Inventor:
Sargis Khoobiar
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Dec 26, 1978
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.