Granted Patent
Utility
US 4,477,498 · App. 06/408,084
Process for the production of perfluoroalkyl residue containing condensation products, the condensation products prepared accordingly, and their use
Inventors:
Hans Deiner, Franz Mosch, Bernhard Sandner, Willy Bernheim
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Aug 13, 1982
Inventors
Hans Deiner
Franz Mosch
Bernhard Sandner
Willy Bernheim
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.