Granted Patent
Utility
US 5,225,481 · App. 07/664,011
Polyol polyacrylate dispersants
Inventors:
Robert G. Gastinger, John E. Hayes
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Mar 4, 1991
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.