IP Library › Granted Patent US 4,824,989
Granted Patent Utility
US 4,824,989 · App. 07/021,162

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Inventor: Gary D. Heidebrecht
Patented Case View Patent ↗
Granted: Apr 25, 1989 Filed: Mar 3, 1987
Inventor
Gary D. Heidebrecht
Assignee (at issue)
Ethyl Corporation

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Quick Facts
Patent No.
US 4,824,989
App. No.
07/021,162
Filed
1987-03-03
Granted
1989-04-25
Kind
A