Granted Patent
Utility
US 4,709,117 · App. 06/849,064
Total isomerization process and apparatus
Inventor:
Robert L. Gray
Patented Case
View Patent ↗
Granted: Nov 24, 1987
Filed: Apr 7, 1986
Inventor
Robert L. Gray
Assignee (at issue)
Union Carbide 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.