Granted Patent
Utility
US 4,906,798 · App. 07/270,820
High viscosity index olefin oligomer process
Inventor:
Ronny W. Lin
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: Nov 14, 1988
Inventor
Ronny W. Lin
Assignee (at issue)
Ethyl Corporation
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.