Granted Patent
Utility
US 5,157,147 · App. 07/609,479
Method for preparing mercaptopropionic acid esters
Inventors:
Daniel R. Chisholm, George A. Seubert, Jr.
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Nov 5, 1990
Inventors
Daniel R. Chisholm
George A. Seubert, Jr.
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.