Granted Patent
Utility
US 5,904,910 · App. 08/965,898
Method for producing sulfur and hydrogen from a gaseous stream containing hydrogen sulfide and ammonia
Inventors:
David K. Stevens, James McCormick
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Nov 7, 1997
Inventors
David K. Stevens
James McCormick
Assignee (at issue)
Black & Veatch Pritchard 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.