Granted Patent
Utility
US 4,428,919 · App. 06/374,130
Method for separating particulate calcium hypochlorite and sodium chloride
Inventors:
David A. Stermole, Clifford E. Loehr, Duk Su Chun
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: May 3, 1982
Inventors
David A. Stermole
Clifford E. Loehr
Duk Su Chun
Assignee (at issue)
PPG Industries, 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.