SAN FRANCISCO — The encrypted messenger service Telegram may not yet have an operational network for the cryptocurrency it has reportedly raised some $1.7 billion to help develop. But that’s not stopping the company from going after another crypto startup that also wants to use the term “gram” as the name for its digital coin.

Represented by attorneys from Skadden, Arps, Slate, Meagher & Flom, Telegram Messenger Inc. on Friday filed a trademark suit in federal court in San Francisco against Lantah LLC, which has an address registered in Florida and presents itself as building an online marketplace where “buyers and sellers can effortlessly use their currency of choice to participate.” That includes a cryptocurrency it’s developing called “gram.”