Granted Patent
Utility
US 4,721,733 · App. 07/023,499
Polymer polyol dispersion from .alpha.,.beta. ethylenically unsaturated dicarboxylic acid anhydrides
Inventors:
Robert G. Gastinger, John E. Hayes
Patented Case
View Patent ↗
Granted: Jan 26, 1988
Filed: Mar 9, 1987
Inventors
Robert G. Gastinger
John E. Hayes
Assignee (at issue)
Atlantic Richfield Company
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.