Granted Patent
Utility
US 5,351,631 · App. 08/159,682
Removable damper for chemical recovery furnace
Inventors:
Robert B. Hill, Daniel R. Higgins, Kenneth A. Pingel
Patented Case
View Patent ↗
Granted: Oct 4, 1994
Filed: Nov 30, 1993
Inventors
Robert B. Hill
Daniel R. Higgins
Kenneth A. Pingel
Assignee (at issue)
Anthony-Ross 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.