ELSA

What this record means

The record shows that the “ELSA” mark, owned by Schering Aktiengesellschaft, is no longer active – it was cancelled for failure to renew and is listed as dead/expired, with the last meaningful status event being the Section 8/Section 9 cancellation on Jan 26 2007. The registration covered only Class 001 goods described as “biochemicals, namely, medical diagnostic reagents for in‑vitro laboratory use,” so a similar name would raise the closest record‑based concern if you are offering comparable diagnostic chemicals or related laboratory products. The record does not give Schering control over every possible use of the word “ELSA” in other fields, and because the mark was on the Principal Register (not the Supplemental Register) there is no examination sequence to explain. The prosecution history contains no oppositions, cancellations beyond the renewal lapse, or other enforcement actions, so the supplied history shows none. I'd treat this as a modest concern only if you plan to operate in the same biochemical diagnostic space.