Granted Patent
Utility
US 5,438,086 · App. 08/232,950
Hydrolytically stable pentaerythritol diphosphites
Inventors:
Donald Stevenson, Satyanarayana Kodali
Patented Case
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Granted: Aug 1, 1995
Filed: Apr 25, 1994
Inventors
Donald Stevenson
Satyanarayana Kodali
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.