[icebraining]

The 'gram' prefix has been around for quite a while

So has "Apple", yet Apple was still sued by Apple and had to settle. A generic term may be trademarked as long as it doesn't describe the particular goods or services being sold.

[pbhjpbhj]

Apple Computers were rightly sued by Apple (the music company, Apple Records?) as the computer company was getting in to the area of music.

The suffix -gram is already well known from "telegram" and adopted in to other 'message sharing via different media' situations: cookiegram, kissogram, etc..

The Apple case is a million miles from Littergram vs. Instagram. If they'd tried to create "Binstagram" there would be a case to answer ...

I consider the chance of actual confusion (which FWIW isn't actually the measure normally used to judge infringement) to be practically zero.

[tamana]

But "gram" does describe service of sending pictures.

[icebraining]

Not really. "gram" just means "written record". Mammogram, echocardiogram, sonogram, monogram - none have anything to do with "sending" or "pictures".

[celticninja]

There is a messaging app called Telegram and they never went after that. This smacks of bullying.