Granted Patent
Utility
US 5,004,797 · App. 07/275,405
Partly fluorinated carboxylic acids and derivatives thereof, processes for their preparation and their use
Inventors:
Freimund Rohrscheid, Gunter Siegemund, Jurgen Lau
Patented Case
View Patent ↗
Granted: Apr 2, 1991
Filed: Nov 23, 1988
Inventors
Freimund Rohrscheid
Gunter Siegemund
Jurgen Lau
Assignee (at issue)
Hoechst GmbH
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.