Granted Patent
Utility
US 4,725,378 · App. 06/605,344
Systems for delayed release of bleaching agents
Inventor:
Dawn T. Krawczak
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: Apr 30, 1984
Inventor
Dawn T. Krawczak
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.