Granted Patent
Utility
US 5,248,816 · App. 07/958,058
Process for making 2-hydroxymandelic acid and 2-hydroxybenzaldehydes
Inventors:
Ralph Shuttleworth, Jan Michael Fielden, Daniel Levin
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Oct 8, 1992
Inventors
Ralph Shuttleworth
Jan Michael Fielden
Daniel Levin
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES 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.