Granted Patent
Utility
US 5,223,162 · App. 07/802,842
Washing composition for inhibiting stress cracking in poly(alkylene terephthalate) articles and methods of use therefor
Inventor:
Charles E. Rossio
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Dec 6, 1991
Inventor
Charles E. Rossio
Assignee (at issue)
DIVERSEY, 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.