Granted Patent
Utility
US 5,656,235 · App. 08/379,831
Through airlock for refining furnance
Inventors:
Raymond Jerome Sarlitto, Thomas Bisco, Michael James Fisher
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Jan 27, 1995
Inventors
Raymond Jerome Sarlitto
Thomas Bisco
Michael James Fisher
Assignee (at issue)
Foseco International Limited
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.