IP Library Granted Patent US 4,865,744
Granted Patent Utility
US 4,865,744 · App. 07/224,015

Process for the continuous workup of aqueous crude dye suspensions

Inventors: Christiane Hartling, Alberto Rabassa
Patented Case View Patent ↗
Granted: Sep 12, 1989 Filed: Jul 25, 1988
Inventors
Christiane Hartling
Alberto Rabassa
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 4,865,744
App. No.
07/224,015
Filed
1988-07-25
Granted
1989-09-12
Kind
A