Granted Patent
Utility
US 5,336,433 · App. 07/891,735
Bleaching agent
Inventors:
Hans Lagnemo, Robert E. Sparks, Irwin C. Jacobs
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jun 8, 1992
Inventors
Hans Lagnemo
Robert E. Sparks
Irwin C. Jacobs
Assignee (at issue)
Eka Nobel AB
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.