Granted Patent
Utility
US 5,151,464 · App. 07/752,753
Miscible polyblends of acid-and anhydride-containing copolymers
Inventor:
Lau S. Yang
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Aug 30, 1991
Inventor
Lau S. Yang
Assignee (at issue)
Arco Chemical Technology, L.P.
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.