Granted Patent
Utility
US 6,235,821 · App. 09/402,250
Cleansing thermoplastic resin composition
Inventor:
Takanori Saito
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Dec 8, 1999
Inventor
Takanori Saito
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.