Granted Patent
Utility
US 4,514,271 · App. 06/496,789
Stable dispersion of alkylated polyvinylpyrrolidone and vinyl pyrrolidone
Inventors:
Earl P. Williams, Lindley S. Wood
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: May 23, 1983
Inventors
Earl P. Williams
Lindley S. Wood
Assignee (at issue)
GAF Corporation
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.