Granted Patent
Utility
US 4,551,322 · App. 06/474,895
Process for preparing zeolite powder of type A (IV)
Inventors:
Hans Strack, Wolfgang Roebke, Dieter Kneitel, Ehrfried Parr
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Mar 14, 1983
Inventors
Hans Strack
Wolfgang Roebke
Dieter Kneitel
Ehrfried Parr
Assignees (at issue)
Degussa AG
Henkel Kommanditgesellschaft auf Aktien
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.