Granted Patent
Utility
US 4,165,367 · App. 05/805,396
Hair preparations containing vinyl pyrrolidone copolymer
Inventor:
Paritosh M. Chakrabarti
Patented Case
View Patent ↗
Granted: Aug 21, 1979
Filed: Jun 10, 1977
Inventor
Paritosh M. Chakrabarti
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.