Granted Patent
Utility
US 4,293,679 · App. 06/153,307
Composition and method of controlling solid polyurethane particle size with water reactant
Inventor:
Joseph A. Cogliano
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: May 27, 1980
Inventor
Joseph A. Cogliano
Assignee (at issue)
W. R. Grace & Co.
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.