Granted Patent
Utility
US 5,218,021 · App. 07/832,150
Compositions for polar solvent fire fighting containing perfluoroalkyl terminated co-oligomer concentrates and polysaccharides
Inventors:
Kirtland P. Clark, Michael Jacobson, Chang H. Jho
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Feb 6, 1992
Inventors
Kirtland P. Clark
Michael Jacobson
Chang H. Jho
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.