Granted Patent
Utility
US 5,383,951 · App. 08/112,277
Production of granular ammonium sulphate using stripped zinc electrolyte as a granulating aid
Inventors:
James B. Cross, Kenneth L. Beynon, Cashman R. S. M. Hampton
Patented Case
View Patent ↗
Granted: Jan 24, 1995
Filed: Aug 27, 1993
Inventors
James B. Cross
Kenneth L. Beynon
Cashman R. S. M. Hampton
Assignee (at issue)
Cominco, Ltd.
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.