Granted Patent
Utility
US 4,837,247 · App. 07/197,933
Stable polymer polyols in base polyols with molecular weight greater than 4000 using high molecular weight dispersants
Inventors:
Robert G. Gastinger, John E. Hayes
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: May 24, 1988
Inventors
Robert G. Gastinger
John E. Hayes
Assignee (at issue)
Arco Chemical Technology, L.P.
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.