IP Library › Granted Patent US 5,611,818
Granted Patent Utility
US 5,611,818 · App. 08/156,340

Dry leuco sulphur dyes in particulate form

Inventor: Manuel Jose Domingo
Patented Case View Patent ↗
Granted: Mar 18, 1997 Filed: Nov 22, 1993
Inventor
Manuel Jose Domingo
Assignee (at issue)
Sandoz AG

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 5,611,818
App. No.
08/156,340
Filed
1993-11-22
Granted
1997-03-18
Kind
A