Granted Patent
Utility
US 4,420,679 · App. 06/352,656
Gas chromatographic oven using symmetrical flow of preheated - premixed ambient air
Inventor:
Robert L. Howe
Patented Case
View Patent ↗
Granted: Dec 13, 1983
Filed: Feb 26, 1982
Inventor
Robert L. Howe
Assignee (at issue)
The Delta Company, LLC
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.