IP Library Granted Patent US 4,514,271
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,514,271
App. No.
06/496,789
Filed
1983-05-23
Granted
1985-04-30
Kind
A