Granted Patent
Utility
US 5,439,610 · App. 08/308,067
Carpet cleaner containing fluorinated surfactant and styrene maleic anhydride polymer
Inventors:
Tracy Ann Ryan, Catherine Piterski
Patented Case
View Patent ↗
Granted: Aug 8, 1995
Filed: Sep 16, 1994
Inventors
Tracy Ann Ryan
Catherine Piterski
Assignee (at issue)
Reckitt & Colman Limited
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.