Granted Patent
Utility
US 4,731,195 · App. 06/926,111
Encapsulated bleach particles with at least two coating layers having different melting points
Inventor:
Keith E. Olson
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Oct 31, 1986
Inventor
Keith E. Olson
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.