Granted Patent
Utility
US 4,983,689 · App. 07/283,422
Process for making macromolecular monomers of polylactones with terminal acryloyl unsaturation and block copolymers thereof
Inventor:
Simon H. Yu
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Dec 12, 1988
Inventor
Simon H. Yu
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.