SIGMA
USPTO (United States) · Serial 72027240
- Status
- registered
- Status updated
- 3 January 2018
- Filing date
- 29 March 1957
- Registration date
- 11 February 1958
- Nice classification
- 6
- Owner
- MERCK KGAA
- Owner country
- DE
- Raw status code
- 800
As filed by US
Authoritative source
The official US trademark record is at USPTO TSDR (serial 72027240) ↗. Where our data differs from the USPTO record, theirs is correct.
See methodology for refresh cadence + status normalisation. See sources for licensing.