Granted Patent
Utility
US 4,878,481 · App. 07/295,128
Fireplace having chimney construction including cold air barrier
Inventors:
Terry G. Schoeff, Rex A. Kaufman
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Jan 9, 1989
Inventors
Terry G. Schoeff
Rex A. Kaufman
Assignee (at issue)
Majco Building Specialties, L.P.
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.