Granted Patent
Utility
US 4,429,113 · App. 06/229,032
Fractionation of polymers
Inventors:
Stephen H. Wu, Clarence C. Dannelly
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Jan 26, 1981
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.