Granted Patent
Utility
US 4,039,620 · App. 05/571,721
Endothermal carbon dioxide absorption
Inventors:
Loyal G. Netteland, Clifford E. Heintz
Patented Case
View Patent ↗
Granted: Aug 2, 1977
Filed: Apr 25, 1975
Inventors
Loyal G. Netteland
Clifford E. Heintz
Assignee (at issue)
ATO BV
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.