[mananaysiempre]

I mean, yes, it’s a reasonable thing for Sun to want, but I (also not a lawyer) don’t see how it’s within the USPTO’s purview to grant. Sun/Oracle can claim others’ use of “JavaScript” is confusing others with regard to what “Java” is—indeed as you say this seems to have been Netscape’s explicit intent with the name—but that means Sun/Oracle may have some control over the use of the term “JavaScript” through their very real dealings in Java, not their nonexistent ones in JavaScript. You don’t get to squat trademarks, you have to use them. (Unless you have enough money to outlast any challenger in a legal battle. I guess we’ll see how that goes.)