The reason why you won't find a UST labelled Schwalbe and in fact Contis is due to the process and cost: "Background: Mavic holds a patent on a specific rim-bed shape and the corresponding tire-bead shape, which it licenses to other companies. To ensure compatibility across brands, however, a product must be certified before it can bear the UST label. According to Maxime Brunand, Mavic's product manager, an independent lab in Belgium is responsible for granting "technical approval" of products (tires and/or rims). Upon passing the lab's tests, Mavic grants a five-year license for that product to bear the UST logo." So basically, for any manufacturer to put the UST logo onto their tires they need to send n+1 number (Who knows how many) of samples to the Mavic testing facility for approval, at their own expense as well as pay Mavic for the license and a "royalty" for every tire sold with the logo on. Conti's license expired and thus they decided to not renew the license but rather re-label their "UST" tires as "Protection". This is also the reason why many of the other manufacturers came up with their own naming to reflect UST compatible tires i.e. Schwalbe -> Snakeskin, Conti -> Protection etc.
