Granted Patent
Utility
US 4,940,995 · App. 07/273,883
Removal of dissolved gas from ink in an ink jet system
Inventors:
Nathan P. Hine, Robert Lee Wells
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Nov 18, 1988
Inventors
Nathan P. Hine
Robert Lee Wells
Assignee (at issue)
Spectra Group Limited, 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.