Granted Patent
Utility
US 5,198,486 · App. 07/770,991
S-alkylthiopropionic acids and derivatives
Inventors:
Daniel R. Chisolm, Michael H. Fisch, Mark E. Flanagan, Richard D. Peveler
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Oct 1, 1991
Inventors
Daniel R. Chisolm
Michael H. Fisch
Mark E. Flanagan
Richard D. Peveler
Assignee (at issue)
Witco 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.