Granted Patent
Utility
US 4,417,029 · App. 06/289,556
Derivatization of star-block copolymers
Inventor:
Ralph Milkovich
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Aug 3, 1981
Inventor
Ralph Milkovich
Assignee (at issue)
Atlantic Richfield 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.