Granted Patent
Utility
US 4,440,671 · App. 06/469,178
Compositions of hydrocarbon-substituted diphenyl amines and high molecular weight polyethylene glycols; and the use thereof as water-tree retardants for polymers
Inventor:
Robert J. Turbett
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: Feb 23, 1983
Inventor
Robert J. Turbett
Assignee (at issue)
Union Carbide 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.