Granted Patent
Utility
US 6,475,568 · App. 09/854,583
Block, non-(AB)n silicone polyalkyleneoxide copolymers with tertiary amino links
Inventor:
Anna Czech
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: May 15, 2001
Inventor
Anna Czech
Assignee (at issue)
Crompton 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.