Granted Patent
Utility
US 5,802,961 · App. 08/555,522
Methods and apparatus for particulate heat exchange and transfer
Inventors:
Lloyd F. Hay, Jerry M. Hougland, Christopher J. Rufer
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Nov 9, 1995
Inventors
Lloyd F. Hay
Jerry M. Hougland
Christopher J. Rufer
Assignee (at issue)
FMC 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.