Granted Patent
Utility
US 4,559,111 · App. 06/684,208
Azeotropic purification of Z-11-hexadecenal
Inventor:
Charles A. Drake
Patented Case
View Patent ↗
Granted: Dec 17, 1985
Filed: Dec 20, 1984
Inventor
Charles A. Drake
Assignee (at issue)
Phillips Petroleum 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.