Granted Patent
Utility
US 5,830,439 · App. 08/857,954
Fixative vinyl acetate tetrapolymers
Inventors:
Jui-Chang Chuang, Edward W. Walls, Jr.
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: May 16, 1997
Inventors
Jui-Chang Chuang
Edward W. Walls, Jr.
Assignee (at issue)
ISP INVESTMENTS LLC
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.