Granted Patent
Utility
US 4,328,200 · App. 06/269,241
Process for producing calcium hypochlorite
Inventors:
Cletus N. Welch, Clifford E. Loehr, Roger A. Crawford, John E. Carbaugh
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Jun 1, 1981
Inventors
Cletus N. Welch
Clifford E. Loehr
Roger A. Crawford
John E. Carbaugh
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.