Granted Patent
Utility
US 4,992,802 · App. 07/289,876
Method and apparatus for extending the environmental operating range of an ink jet print cartridge
Inventors:
John H. Dion, Thomas H. Winslow
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Dec 22, 1988
Inventors
John H. Dion
Thomas H. Winslow
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.