Granted Patent
Utility
US 4,542,115 · App. 06/406,526
Zeolite granulate, process for its production
Inventors:
Hans Strack, Peter Kleinschmit, Ehrfried Parr
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Aug 9, 1982
Inventors
Hans Strack
Peter Kleinschmit
Ehrfried Parr
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.