Granted Patent
Utility
US 6,632,330 · App. 09/806,112
Process for purification of alkyl alkanoate
Inventors:
Stephen William Colley, Norman Harris, Colin Rathmell
Patented Case
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Granted: Oct 14, 2003
Filed: Jun 5, 2001
Inventors
Stephen William Colley
Norman Harris
Colin Rathmell
Assignee (at issue)
Davy Process Technology Limited
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.