IP Library › Granted Patent US 4,679,658
Granted Patent Utility
US 4,679,658 · App. 06/751,872

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Inventor: Harlan J. Demers
Patented Case View Patent ↗
Granted: Jul 14, 1987 Filed: Jul 5, 1985
Inventor
Harlan J. Demers
Assignee (at issue)
KOPPERS, INC.

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Quick Facts
Patent No.
US 4,679,658
App. No.
06/751,872
Filed
1985-07-05
Granted
1987-07-14
Kind
A