IP Library Granted Patent US 4,453,944
Granted Patent Utility
US 4,453,944 · App. 06/479,291

Dye stable to dyeing, processes for producing it, and its use for dyeing and printing synthetic and semi-synthetic fibre materials

Inventors: Peter Liechti, Antoine Clement, Peter Eugster, Kurt Meyer
Patented Case View Patent ↗
Granted: Jun 12, 1984 Filed: Mar 28, 1983
Inventors
Peter Liechti
Antoine Clement
Peter Eugster
Kurt Meyer
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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,453,944
App. No.
06/479,291
Filed
1983-03-28
Granted
1984-06-12
Kind
A