Granted Patent
Utility
US 4,134,922 · App. 05/836,877
Isomerization process
Inventor:
Geoffrey M. A. Leeder
Patented Case
View Patent ↗
Granted: Jan 16, 1979
Filed: Sep 26, 1977
Inventor
Geoffrey M. A. Leeder
Assignee (at issue)
HOFFMANN-LA ROCHE 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.