Granted Patent
Utility
US 5,895,635 · App. 08/955,559
Process for recovery and recycle of ammonia from an acrylonitrile reactor effluent stream using an ammonium phosphate quench system
Inventors:
James F. Brazdil, Kenneth P. Keckler, Richard P. Hauser
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: Oct 17, 1997
Inventors
James F. Brazdil
Kenneth P. Keckler
Richard P. Hauser
Assignee (at issue)
The Standard Oil 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.