What this record means
The record shows that “JACK” is not a live filing – it was abandoned on January 13 2009 after the applicant failed to respond to an Office action, and the owner listed is Douglas R. McClemont, an individual. The only goods covered are “magazines featuring pictorials, articles, reviews dealing with sex, fine arts and fashion” in International Class 016, so a similar name used for paper‑goods or printed‑matter in that niche would be the closest record‑based concern. The record does not give the owner control over every possible use of the word “JACK,” especially outside those magazine topics. This was a Principal Register application, not a Supplemental Register filing, and the prosecution history simply ends with the abandonment notice; there are no oppositions, cancellations or court actions shown. I'd treat this as a moderate concern if you plan a comparable magazine brand, but the risk drops sharply for unrelated products or services.
Informational only - not legal advice.