Granted Patent
Utility
US 5,235,089 · App. 07/843,867
Process for the preparation of 3-cyano-3,5,5-trimethylcyclohexanone
Inventors:
Richard P. Woodbury, Jon C. Thunberg, Steven P. VanKouwenberg, Walter B. Begonis
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Feb 27, 1992
Inventors
Richard P. Woodbury
Jon C. Thunberg
Steven P. VanKouwenberg
Walter B. Begonis
Assignee (at issue)
Hampshire Chemical Corp.
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.