Granted Patent
Utility
US 5,023,285 · App. 07/223,318
Bis (tri-tertiary-alkylphenoxy) diphosphaspiroundecanes
Inventor:
William E. Horn, Jr.
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Jul 25, 1988
Inventor
William E. Horn, Jr.
Assignee (at issue)
G E Specialty Chemicals
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.