Granted Patent
Utility
US 5,221,531 · App. 07/796,998
Polymer hair fixatives, aqueous-based solution process for making same and water-based hair spray formulations therewith which meet VOC standards
Inventors:
Stephen L. Kopolow, Yoon T. Kwak, Mohammed Tazi, Edward W. Walls, Jr.
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Nov 25, 1991
Inventors
Stephen L. Kopolow
Yoon T. Kwak
Mohammed Tazi
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.