Granted Patent
Utility
US 5,011,968 · App. 07/475,051
Process for the preparation of 3-cyano-3,5,5-trimethylcyclohexanone
Inventors:
Jon C. Thunberg, Walter B. Begonis
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Feb 6, 1990
Inventors
Jon C. Thunberg
Walter B. Begonis
Assignee (at issue)
W.R. Grace & Co. Conn.
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.