Granted Patent
Utility
US 4,569,797 · App. 06/522,219
Production of isoxanthate salts and dithiocarbonate diesters
Inventor:
Donald M. Snyder
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Aug 11, 1983
Inventor
Donald M. Snyder
Assignee (at issue)
Virginia Chemicals Inc.
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.