Granted Patent
Utility
US 4,454,056 · App. 06/473,634
Process for the production of zeolites modified on the surface with organosilanes
Inventors:
Udo Kittelmann, Manfred Diehl, Roland Bergmann, Gunter Stadtmuller
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Mar 9, 1983
Inventors
Udo Kittelmann
Manfred Diehl
Roland Bergmann
Gunter Stadtmuller
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.