The phrase "an outdated brand" is correct and usable in written English.
You can use it to describe a brand that is no longer relevant or popular in the current market.
Example: "The company struggled to compete because it was seen as an outdated brand in a rapidly changing industry."
Alternatives: "a dated brand" or "an obsolete brand."
There is, however, an outdated brand of digital orthodoxy that ought to be retired.
All in all, Stevens, the fifth Eredivisie manager to lose or quit this year, may be an outdated brand of leader.
Thorntons in its present form is criticised for 'poky' outlets and an outdated brand image; indeed, some purists argue that its chocolate is not a premium product at all.
Many NAACP critics say the organization is the embodiment of an outdated brand of suit-and-tie activism that puts too much of a premium on respectability and etiquette.
To many millennials, Campbell's is an outdated brand with an outdated product.
OS X now seems like an outdated brand compared to Apple's other platforms.
He wrote that there were some "legitimate citizen complaints about abusive or racist language from a senior Ferguson officer," who he said was "a rotten apple" and a "bad-tempered bully who routinely cut corners as he pursued his own outdated brand of street justice". Jackson claimed he tried to get rid of him "from day one" but was delayed by union rules.
Of course, no one likes to buy a brand new phone running an outdated platform, but that seems to be the trend right now with carriers.
Adding to its problems, Tsingtao relied on an outdated network of distributors who did not push the brand hard enough.
An obituary on Monday about the fashion designer Lilly Pulitzer included an outdated reference for annual sales of the Lilly Pulitzer brand.
Because of an editing error, the Advertising column on Wednesday, about a new marketing campaign for Grey Poupon mustard, gave an outdated job title for Sara Braun at Kraft Foods, which owns the brand.
