Granted Patent
Utility
US 4,966,920 · App. 07/299,165
Smoke and toxic gas suppressant composition
Inventors:
James Gainer, Robert L. Bentley
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Jan 19, 1989
Inventors
James Gainer
Robert L. Bentley
Assignee (at issue)
Ciba-Geigy
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.