Granted Patent
Utility
US 6,518,474 · App. 09/692,021
Process for producing isobutylene from tertiary butyl alcohol
Inventors:
John R. Sanderson, Mark A. Mueller
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Oct 19, 2000
Inventors
John R. Sanderson
Mark A. Mueller
Assignee (at issue)
HUNTSMAN INTERNATIONAL LLC
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.