Granted Patent
Utility
US 4,938,842 · App. 07/392,626
High consistency peroxide bleaching
Inventors:
Philip Whiting, Adele M. Rhodes, Arnold E. Willoughby, Martin G. Fairbank, Hollis D. MacEwen, Fraser McLellan
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: Feb 23, 1989
Inventors
Philip Whiting
Adele M. Rhodes
Arnold E. Willoughby
Martin G. Fairbank
Hollis D. MacEwen
Fraser McLellan
Assignee (at issue)
Abitibi-Price, 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.