Granted Patent
Utility
US 4,652,269 · App. 06/857,681
Process for the continuous trichromatic dyeing of synthetic polyamide materials: including a blue anthraquinone reactive dye
Inventors:
James B. Bowles, Marshall S. White, Alois Puntener, Jean-Marie Adam, Peter Loew
Patented Case
View Patent ↗
Granted: Mar 24, 1987
Filed: Apr 30, 1986
Inventors
James B. Bowles
Marshall S. White
Alois Puntener
Jean-Marie Adam
Peter Loew
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.