Granted Patent
Utility
US 5,466,794 · App. 08/245,350
Thermoplastic cellulose ether ester graft copolymers and process for their production
Inventors:
Jochen Kalbe, Hanns P. Muller, Rainhard Koch, Jurgen Engelhardt, Wolfgang Koch, Klaus Szablikowski, Gunter Weber
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: May 17, 1994
Inventors
Jochen Kalbe
Hanns P. Muller
Rainhard Koch
Jurgen Engelhardt
Wolfgang Koch
Klaus Szablikowski
Gunter Weber
Assignee (at issue)
Wolff Walsrode AG
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.