Granted Patent
Utility
US 6,537,486 · App. 09/528,295
Anti-buildup liner
Inventors:
Paul M. Benson, John P. Sanders, III
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Mar 17, 2000
Inventors
Paul M. Benson
John P. Sanders, III
Assignee (at issue)
Yesuvius Crucible 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.