IP Library › Granted Patent US 5,622,749
Granted Patent Utility
US 5,622,749 · App. 08/650,263

Fluorescent whitening of paper

Inventors: Peter Rohringer, Thomas Ehlis, Josef Zelger
Patented Case View Patent ↗
Granted: Apr 22, 1997 Filed: May 22, 1996
Inventors
Peter Rohringer
Thomas Ehlis
Josef Zelger
Assignee (at issue)
Ciba-Geigy

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Quick Facts
Patent No.
US 5,622,749
App. No.
08/650,263
Filed
1996-05-22
Granted
1997-04-22
Kind
A