Granted Patent
Utility
US 4,449,006 · App. 06/431,858
Preparation of methyl mercaptan from carbon oxides
Inventor:
Paul Gordon Haines
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 29, 1982
Inventor
Paul Gordon Haines
Assignee (at issue)
Pennwalt Corporation
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.