Granted Patent
Utility
US 5,976,238 · App. 08/876,551
Bismuth vanadate pigment powder mixtures
Inventors:
Leonardus Johannes Hubertus Erkens, Gregor Schmitt, Hendrikus Maria Anna Hamers, Johannes Maria Martinus Luijten, Jozef Gertruda Emanuel Mains
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Jun 16, 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.