Recently, a law firm representing Oracle demanded that Apple take down an app with the word "JavaScript" in its name from Apple's App store, as Oracle owns the trademark for the word "JavaScript". Their claim was that "People seeing this app would probably think it was developed or licensed by Oracle"
According to Wikipedia's article on trademarks, section "Maintaining rights":
Trademarks rights must be maintained through actual lawful use of the trademark. These rights will cease if a mark is not actively used for a period of time, normally 5 years in most jurisdictions
Exactly what does "actual lawful use of the trademark" mean, and how much is necessary?
If I ask 1000 JavaScript developers (not random people, who would just say "Ja-what?") what company they associate with JavaScript, I doubt even one percent would say Oracle. Compare this to asking 1000 random people what company they associate with Windows, where I guess a very large percentage would say "Microsoft". Microsoft has clearly maintained their trademark, while Oracle has strongly neglected theirs.
Oracle acquired the trademark to in 2010, when they bought Sun Microsystems. As far as I know, they have not been enforcing that trademark at all before now, approximately 8 years later, and the word "JavaScript" is very widely used, and in no practical way linked to Oracle. I strongly doubt anyone will actually think "This app is probably developed or licensed by Oracle" when seeing something with "JavaScript" in its name.
Would the law firm's claims hold up in court?
A similar example from reality, not part of the question
In Norway, the snack company Maarud had the trademark for the word "Potetgull", which was supposed to be the norwegian word for "potato chips". The word eventually over the years got that exact meaning, with people no longer associating it with Maarud, but potato chips in general. When a rivaling company, KiMs, released potato chips with the name "Potetgull". Maarud sued KiMs and lost because the word had fallen into everyday language