Granted Patent
Utility
US 4,673,553 · App. 06/905,071
Metal honeycomb catalyst support having a double taper
Inventor:
William B. Retallick
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Sep 8, 1986
Inventor
William B. Retallick
Assignee (at issue)
Camet Company
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.