Granted Patent
Utility
US 4,455,415 · App. 06/376,882
Polymeric tertiary and secondary amines with a silica-type backbone, processes for their preparation, and use
Inventors:
Peter Panster, Peter Kleinschmit, Wolfgang Buder
Patented Case
View Patent ↗
Granted: Jun 19, 1984
Filed: May 10, 1982
Inventors
Peter Panster
Peter Kleinschmit
Wolfgang Buder
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.