Granted Patent
Utility
US 4,339,596 · App. 06/094,425
Treatment of byproduct stream from adipic acid manufacture
Inventors:
Freylon B. Coffey, Norbert F. Cywinski
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Nov 15, 1979
Inventors
Freylon B. Coffey
Norbert F. Cywinski
Assignee (at issue)
El Paso Products 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.