IP Library Granted Patent US 4,814,151
Granted Patent Utility
US 4,814,151 · App. 07/077,577

Soda ash manufacture

Inventor: Alan Henry Benke
Patented Case View Patent ↗
Granted: Mar 21, 1989 Filed: Jul 23, 1987
Inventor
Alan Henry Benke
Assignee (at issue)
Stauffer Chemical Company

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.

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Quick Facts
Patent No.
US 4,814,151
App. No.
07/077,577
Filed
1987-07-23
Granted
1989-03-21
Kind
A