Granted Patent
Utility
US 5,377,300 · App. 07/971,490
Heater for processing gases
Inventors:
Craig C. Collins, Eric A. Ahlstrom
Patented Case
View Patent ↗
Granted: Dec 27, 1994
Filed: Nov 4, 1992
Inventors
Craig C. Collins
Eric A. Ahlstrom
Assignee (at issue)
Watkins-Johnson Company, 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.