Granted Patent
Utility
US 5,437,574 · App. 08/247,307
Top sealing chimney cap
Inventor:
Walter Sexton
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: May 23, 1994
Inventor
Walter Sexton
Assignee (at issue)
Lyemance International
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.