Granted Patent
Utility
US 4,518,769 · App. 06/543,677
Fractionation of polymers
Inventors:
Stephen H. Wu, Clarence C. Dannelly
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Oct 20, 1983
Inventors
Stephen H. Wu
Clarence C. Dannelly
Assignee (at issue)
EASTMAN KODAK 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.