Copolymer of vinyl pyrrolidone and a C30 alpha-olefin in flake or powder form, process for making same, and personnal care compositions therewith

Granted: Feb 9, 1993 Filed: Jul 10, 1992

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.