Although laches is not available against a copyright or patent claim within the term of the statute, the Lanham Act provides a five year period to equitably challenge a mark, after which a challenge is still available on other grounds. Laches, as an equitable defense, is therefore available as a defense within the initial five year term.
No error in finding that the claim was equitably barred, given showing that most analogous state statutes of limitations had expired.
http://cdn.ca9.uscourts.gov/datastore/opinions/2018/06/29/17-55325.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.