Granted Patent
Utility
US 4,520,575 · App. 06/554,967
Impingement oven and method
Inventors:
Donald P. Holmes, David I. McDonald
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Nov 25, 1983
Inventors
Donald P. Holmes
David I. McDonald
Assignee (at issue)
Cincinnatti Milacron Inc.
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.