USPTOProtect this trademark from copycats!
With our trademark monitoring alerts, you are automatically notified by email about copycats and free riders.
The US trademark OPTEF DROPS was filed as Word mark on 01/28/1957 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 09/24/1957.
The current status of the mark is "EXPIRED".
| Trademark form | Word mark |
| File reference | 72023377 |
| Register number | 651978 |
| Application date | January 28, 1957 |
| Entry date | September 24, 1957 |
Trademark owner
KALOMAZOO MI
goods and services
5
HORMONAL OPHTHALMIC PREPARATION
ID: 1372023377