Granted Patent
Utility
US 5,191,139 · App. 07/787,164
Process for oligomerizing olefins using sulfate-activated group IV oxides
Inventors:
John R. Sanderson, John F. Knifton, John M. Larkin
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Nov 4, 1991
Inventors
John R. Sanderson
John F. Knifton
John M. Larkin
Assignee (at issue)
Texaco Chemical 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.