IP Library › Granted Patent US 4,648,992
Granted Patent Utility
US 4,648,992 · App. 06/700,203

Water-soluble phthalocyanine compounds

Inventors: Gregor Graf, Gerd Holzle, Gerhard Reinert
Patented Case View Patent ↗
Granted: Mar 10, 1987 Filed: Feb 11, 1985
Inventors
Gregor Graf
Gerd Holzle
Gerhard Reinert
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 4,648,992
App. No.
06/700,203
Filed
1985-02-11
Granted
1987-03-10
Kind
A