Granted Patent
Utility
US 4,935,513 · App. 07/362,821
Thiation process
Inventor:
Barbara C. Stahly
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Jun 7, 1989
Inventor
Barbara C. Stahly
Assignee (at issue)
Ethyl 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.