Granted Patent
Utility
US 5,489,638 · App. 07/862,046
Poly(vinyl alcohol) fluidized polymer suspensions
Inventor:
Charles L. Burdick
Patented Case
View Patent ↗
Granted: Feb 6, 1996
Filed: Apr 2, 1992
Inventor
Charles L. Burdick
Assignee (at issue)
Aqualon 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.