Granted Patent
Utility
US 5,186,748 · App. 07/845,517
Process for the preparation of bismuth vanadate pigments, and novel bismuth vanadate pigments of high color strength
Inventors:
Leonardus Johannes Hubertus Erkens, Gregor Schmitt, Herman J. J. M. Geurts, Werner F. C. G. Corvers
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Feb 27, 1992
Inventors
Leonardus Johannes Hubertus Erkens
Gregor Schmitt
Herman J. J. M. Geurts
Werner F. C. G. Corvers
Assignee (at issue)
Ciba-Geigy
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.