IP Library › Granted Patent US 4,609,741
Granted Patent Utility
US 4,609,741 · App. 06/639,048

Phthalic acid derivatives which are substituted by 2-propynyloxy groups, processes for their preparation and their use

Inventors: Roland Darms, Vratislav Kvita, Charles E. Monnier
Patented Case View Patent ↗
Granted: Sep 2, 1986 Filed: Aug 9, 1984
Inventors
Roland Darms
Vratislav Kvita
Charles E. Monnier
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 4,609,741
App. No.
06/639,048
Filed
1984-08-09
Granted
1986-09-02
Kind
A