Granted Patent
Utility
US 4,466,340 · App. 06/442,548
Chimney assembly
Inventor:
Clifton F. Briner
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Nov 18, 1982
Inventor
Clifton F. Briner
Assignee (at issue)
American Standard Inc.
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.