Granted Patent
Utility
US 4,894,482 · App. 07/281,302
Process for drying hydrogen fluoride-carboxylic acid mixtures
Inventors:
Daniel D. Lindley, Carl D. Murphy
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Dec 6, 1988
Inventors
Daniel D. Lindley
Carl D. Murphy
Assignee (at issue)
Hoechst Celanese 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.