Granted Patent
Utility
US 6,566,470 · App. 09/834,773
Fluorinated polymeric paper sizes and soil-release agents
Inventors:
Shobha Kantamneni, Franz Dirschl
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 12, 2001
Inventors
Shobha Kantamneni
Franz Dirschl
Assignee (at issue)
Ciba Specialty Chemicals 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.