Granted Patent
Utility
US 4,283,303 · App. 06/156,744
Process for manufacture of stable sodium dithionite slurries
Inventor:
Leonard C. Ellis
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Jun 5, 1980
Inventor
Leonard C. Ellis
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.