Granted Patent
Utility
US 5,952,444 · App. 08/925,183
Polyurethane coating resin composition
Inventor:
Koichi Ayama
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Sep 8, 1997
Inventor
Koichi Ayama
Assignee (at issue)
Chisso Corporation
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.