Granted Patent
Utility
US 4,730,014 · App. 06/920,624
Use of pyridoquinolone derivatives as pigments
Inventors:
Alain C. Rochat, Abul Iqbal, Edward E. Jaffe
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Oct 20, 1986
Inventors
Alain C. Rochat
Abul Iqbal
Edward E. Jaffe
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.