Granted Patent
Utility
US 5,407,598 · App. 08/023,941
Shaped solid bleach with encapsulate source of bleach
Inventors:
Keith E. Olson, Victor Fuk-Pong Man
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Feb 26, 1993
Inventors
Keith E. Olson
Victor Fuk-Pong Man
Assignee (at issue)
ECOLAB 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.