Granted Patent
Utility
US 4,675,448 · App. 06/848,969
Chlorination process
Inventor:
Barbara C. Stahly
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Apr 7, 1986
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.