Granted Patent
Utility
US 6,167,638 · App. 09/313,082
Drying of grain and other particulate materials
Inventors:
Matthew E. Vavro, Wayne Mueller
Patented Case
View Patent ↗
Granted: Jan 2, 2001
Filed: May 17, 1999
Inventors
Matthew E. Vavro
Wayne Mueller
Assignee (at issue)
ClearWater Holdings, Ltd.
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.