Granted Patent
Utility
US 4,954,558 · App. 07/296,248
Resin-fortified emulsion polymers and methods of preparing the same
Inventor:
Sheng-Liang Tsaur
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Jan 11, 1989
Inventor
Sheng-Liang Tsaur
Assignee (at issue)
S. C. JOHNSON & SON, 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.