Granted Patent
Utility
US 4,267,087 · App. 06/012,611
Perfluoroalkyl substituted anhydrides and polyacids, and derivatives thereof
Inventor:
Karl F. Mueller
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Feb 16, 1979
Inventor
Karl F. Mueller
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.