IP Library › Granted Patent US 4,946,946
Granted Patent Utility
US 4,946,946 · App. 07/260,995

Production of low ash lignin

Inventors: Peter R. Fields, Pudens L. Ragg
Patented Case View Patent ↗
Granted: Aug 7, 1990 Filed: Oct 21, 1988
Inventors
Peter R. Fields
Pudens L. Ragg
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED

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Quick Facts
Patent No.
US 4,946,946
App. No.
07/260,995
Filed
1988-10-21
Granted
1990-08-07
Kind
A