Granted Patent
Utility
US 5,283,046 · App. 07/613,935
Method for re-use of aqueous co-product from manufacture of sodium dithionite
Inventors:
Charles E. Winslow, Jr., Joseph L. Bush, Leonard C. Ellis
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Nov 14, 1990
Inventors
Charles E. Winslow, Jr.
Joseph L. Bush
Leonard C. Ellis
Assignee (at issue)
Hoechst Celanese 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.