Granted Patent
Utility
US 4,849,987 · App. 07/259,898
Combination left and right handed furnace roof
Inventors:
Frank Henry Miner, Jr., Arthur M. Siffer
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Oct 19, 1988
Inventors
Frank Henry Miner, Jr.
Arthur M. Siffer
Assignee (at issue)
Union Carbide Corporation
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.