Granted Patent
Utility
US 4,865,760 · App. 07/178,180
Calcium hypochlorite composition
Inventors:
Harlan B. Johnson, Charles R. Wiedrich, Ernie I. Allen, Peter P. Howell
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Apr 6, 1988
Inventors
Harlan B. Johnson
Charles R. Wiedrich
Ernie I. Allen
Peter P. Howell
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.