Granted Patent
Utility
US 4,769,054 · App. 07/110,845
Abatement of vapors from gas streams by solidification
Inventor:
Frederic N. Steigman
Patented Case
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Granted: Sep 6, 1988
Filed: Oct 21, 1987
Inventor
Frederic N. Steigman
Assignee (at issue)
Union Carbide Corporation
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.