Granted Patent
Utility
US 4,705,879 · App. 06/817,899
Long-chain alkylresorcinol phosphites
Inventor:
Hans Dressler
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Jan 13, 1986
Inventor
Hans Dressler
Assignee (at issue)
KOPPERS, INC.
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.