Granted Patent
Utility
US 5,070,893 · App. 07/305,396
Apparatus and method for removing washcoat remaining in the channels of freshly coated monolithic or honeycombed catalyst carriers and use of the apparatus
Inventors:
Ewald Dittrich, Reinhard Manner, Gerhard Birtigh, Felix Schmidt
Patented Case
View Patent ↗
Granted: Dec 10, 1991
Filed: Feb 2, 1989
Inventors
Ewald Dittrich
Reinhard Manner
Gerhard Birtigh
Felix Schmidt
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.