Granted Patent
Utility
US 5,928,476 · App. 08/914,140
Nonrecovery coke oven door
Inventor:
Jerry Daniels
Patented Case
View Patent ↗
Granted: Jul 27, 1999
Filed: Aug 19, 1997
Inventor
Jerry Daniels
Assignee (at issue)
Sun Coal 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.