Granted Patent
Utility
US 4,729,886 · App. 06/865,092
Method of preparing reproducibly stable aqueous suspensions of sodium dithionite for woodpulp bleaching
Inventors:
Edwin D. Little, Karsten R. Minzghor
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: May 20, 1986
Inventors
Edwin D. Little
Karsten R. Minzghor
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.