Granted Patent
Utility
US 5,788,896 · App. 08/810,985
Method of producing micron sized sulphur granules
Inventors:
Edward Frank Bertram, Rodger Blackwood, William Chee Kay, James Kenneth Laidler
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Feb 27, 1997
Inventors
Edward Frank Bertram
Rodger Blackwood
William Chee Kay
James Kenneth Laidler
Assignees (at issue)
Alberta Research Council Inc.
Superfine Sulphor Inc.
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.