Granted Patent
Utility
US 6,827,774 · App. 10/450,031
Rheology improvers and pigment compositions having improved rheology
Inventor:
Philippe Bugnon
Patented Case
View Patent ↗
Granted: Dec 7, 2004
Filed: Jun 10, 2003
Inventor
Philippe Bugnon
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.