Granted Patent
Utility
US 4,677,839 · App. 06/844,607
Apparatus for shaping a spiral catalyst support
Inventor:
William B. Retallick
Patented Case
View Patent ↗
Granted: Jul 7, 1987
Filed: Mar 27, 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.