Granted Patent
Utility
US 5,853,472 · App. 08/863,312
Transparent bismuth vanadate pigments
Inventors:
Leonardus Johannes Hubertus Erkens, Gregor Schmitt, Hendrikus Maria Anna Hamers, Johannes Maria Martinus Luijten, Jozef Gertruda Emanuel Mains
Patented Case
View Patent ↗
Granted: Dec 29, 1998
Filed: May 27, 1997
Inventors
Leonardus Johannes Hubertus Erkens
Gregor Schmitt
Hendrikus Maria Anna Hamers
Johannes Maria Martinus Luijten
Jozef Gertruda Emanuel Mains
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.