Granted Patent
Utility
US 4,565,833 · App. 06/541,352
Fire retardant composition
Inventors:
David Buszard, Richard J. Dellar
Patented Case
View Patent ↗
Granted: Jan 21, 1986
Filed: Oct 12, 1983
Inventors
David Buszard
Richard J. Dellar
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.