IP Library › Granted Patent US 5,342,977
Granted Patent Utility
US 5,342,977 · App. 07/991,938

Aminosulfonic acid derivatives and processes for their preparation

Inventors: Gerhard Baschang, Albert Hartmann
Patented Case View Patent ↗
Granted: Aug 30, 1994 Filed: Dec 17, 1992
Inventors
Gerhard Baschang
Albert Hartmann
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 5,342,977
App. No.
07/991,938
Filed
1992-12-17
Granted
1994-08-30
Kind
A