If Google ARE merely trying to trademark the "Glass" logo then that's fine with me. But, all of the reporting I've seen is that Google aren't trying to get a logo through, they're trying to stake a claim to "glass" as THEIR tm. In which case the USTO are definitely correct to tell 'em to take a hike. It's as ridiculous as Apple's "rectangular screen with a bezel" EU trademark from last year.