Granted Patent
Utility
US 5,213,660 · App. 07/647,627
Secondary fiber cellulose product with reduced levels of polychlorinated dibenzodioxins and polychlorinated dibenzofurans
Inventors:
Shafi U. Hossain, Carol Ann Blaney
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Feb 28, 1991
Inventors
Shafi U. Hossain
Carol Ann Blaney
Assignee (at issue)
Kimberly-Clark 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.