Granted Patent
Utility
US 5,974,689 · App. 09/034,369
Chemical drying and cleaning system
Inventors:
Gary W. Ferrell, Robert Elson, John F. Schipper
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Mar 3, 1998
Inventors
Gary W. Ferrell
Robert Elson
John F. Schipper
Assignee (at issue)
Gary W. Farrell
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.