Granted Patent
Utility
US 4,568,717 · App. 06/658,947
Polymer polyols from liquid terephthalic polyester polyols
Inventors:
George P. Speranza, Michael Cuscurida
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Oct 9, 1984
Inventors
George P. Speranza
Michael Cuscurida
Assignee (at issue)
Texaco Inc.
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.