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The US trademark DUO-THERM was filed as Word mark on 04/27/1945 at the U.S. Patent and Trademark Office.
It was registered as a trademark on 11/26/1946.
The current status of the mark is "EXPIRED".
| Trademark form | Word mark |
| File reference | 71482695 |
| Register number | 425512 |
| Application date | April 27, 1945 |
| Entry date | November 26, 1946 |
Trademark owner
LANSING,MICH.
goods and services
11
OIL BURNING FURNACES
ID: 1371482695