Granted Patent
Utility
US 4,940,784 · App. 07/227,298
Method for the dry cationization of galactomannans (II)
Inventors:
Reinhard Stober, Wolfgang Fischer, Michael Huss, Reimund Pieter
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Aug 2, 1988
Inventors
Reinhard Stober
Wolfgang Fischer
Michael Huss
Reimund Pieter
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.