Granted Patent
Utility
US 5,196,476 · App. 07/537,187
Polymer/polyol and preformed stabilizer systems
Inventor:
Donald W. Simroth
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: Jun 12, 1990
Inventor
Donald W. Simroth
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.