Granted Patent
Utility
US 4,485,246 · App. 06/437,725
Amine promoted catalytic hydrogenation of carboxylic acid anhydrides to lactones or esters
Inventor:
James E. Lyons
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Oct 29, 1982
Inventor
James E. Lyons
Assignee (at issue)
SUN-TECH LIMITED
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.