Granted Patent
Utility
US 5,789,570 · App. 08/563,405
Swellable starch ester and methods of its production and use
Inventors:
Stefan Buchholz, Klaus Dorn, Thomas Eurich
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Nov 30, 1995
Inventors
Stefan Buchholz
Klaus Dorn
Thomas Eurich
Assignee (at issue)
Degussa 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.