Granted Patent
Utility
US 4,848,094 · App. 07/188,308
Droplet freezing method and apparatus
Inventors:
Robert B. Davis, Donald Leonard DeVack
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Apr 29, 1988
Inventors
Robert B. Davis
Donald Leonard DeVack
Assignee (at issue)
Union Carbide 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.