Granted Patent
Utility
US 4,243,418 · App. 05/944,662
Compositions for fireproofing polyester fiber materials with substituted sulphurylamides
Inventors:
Hermann Nachbur, Armin Hiestand, Peter Rohringer
Patented Case
View Patent ↗
Granted: Jan 6, 1981
Filed: Sep 21, 1978
Inventors
Hermann Nachbur
Armin Hiestand
Peter Rohringer
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.