Granted Patent
Utility
US 4,440,731 · App. 06/299,689
Process for removal of carbon dioxide from industrial gases
Inventor:
Roscoe L. Pearce
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Sep 8, 1981
Inventor
Roscoe L. Pearce
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.