Granted Patent
Utility
US 4,629,588 · App. 06/679,348
Method for refining glyceride oils using amorphous silica
Inventors:
William A. Welsh, Yves Parent
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Dec 7, 1984
Inventors
William A. Welsh
Yves Parent
Assignee (at issue)
W. R. Grace & Co.
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.