Granted Patent
Utility
US 4,294,992 · App. 06/114,601
Process for the production of alkyl aryl ethers
Inventor:
Graham K. Hughes
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jan 23, 1980
Inventor
Graham K. Hughes
Assignee (at issue)
Southland 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.