DUFF-NORTON
USPTO (United States) · Serial 71486521
- Status
- registered
- Status updated
- 10 March 2007
- Filing date
- 31 July 1945
- Registration date
- 4 June 1946
- Nice classification
- 23
- Owner
- DUFF-NORTON MANUFACTURING COMPANY, THE
- Owner country
- US
- Raw status code
- 900
As filed by US
Authoritative source
The official US trademark record is at USPTO TSDR (serial 71486521) ↗. Where our data differs from the USPTO record, theirs is correct.
See methodology for refresh cadence + status normalisation. See sources for licensing.