Granted Patent
Utility
US 4,497,741 · App. 06/445,784
Water-soluble zinc and aluminium phthalocyanines
Inventors:
Gerd Holzle, Mirella Miotto, Gerhard Reinert, Rudolf Polony
Patented Case
View Patent ↗
Granted: Feb 5, 1985
Filed: Dec 1, 1982
Inventors
Gerd Holzle
Mirella Miotto
Gerhard Reinert
Rudolf Polony
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.