Granted Patent
Utility
US 5,025,922 · App. 07/364,956
Agent for imparting antistatic characteristics to a thermoplastic polymer and a thermoplastic polymer composition containing the agent
Inventors:
Marvin R. Havens, Joseph R. Lovin
Patented Case
View Patent ↗
Granted: Jun 25, 1991
Filed: Jun 9, 1989
Inventors
Marvin R. Havens
Joseph R. Lovin
Assignee (at issue)
W.R. Grace & Co. Conn.
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.