Granted Patent
Utility
US 4,871,866 · App. 07/088,293
Lysocellin solids purification process
Inventors:
Alexander H. T. Chu, M. James Levi
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Aug 24, 1987
Inventors
Alexander H. T. Chu
M. James Levi
Assignee (at issue)
Pitman-Moore, Inc.
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.