Why is this not a draw?

I ran out of time, but my opponent only had a king and bishop. He did not have enough material to mate, yet he was awarded the victory. I've played on other sites, and they consider it a draw even if you run out of time.

B+K v. K is a draw.
Did you have any material left besides your king? Then it's not a draw. If it's possible to construct a mate, even if it would be a help mate, you lose.

I had two pawns to his bishop. Yes, if i had more time I could've won, but he had no chance. Doesn't seem fair he should be awarded the victory.

There is a possible sequence of moves that let him win. The rules say that you lose in that case. Otherwise you would need a referee for every single game.

Because you could promote a pawn to a knight and use the knight to trap your king in the corner, allowing the bishop to give checkmate. Under FIDE rules this scenario is a win, in USCF it’s a draw. Not sure which rule set this site uses.

Nothing worth worrying about. Focus on improving and learning, not this kind of technicality.

Obviously we are playing FIDE rules and not USCF. Well I guess some people would be dumb enough to promote their pawns to two knights and allow their king to be trapped by a single bishop. So that 1 out of a million chance of happening gave my opponent the victory. And oceanside view, English may not be your first language, but it is spelled "lose".

aaa

#3 Would you call this result fair?

This is no problem?

Toadsky - not sure what your point is with this? There is ample material to mate on both sides.

Sargon - Yes, slim to no chances of black winning, but that's not my point. A pawn could be converted to a piece that could win - though not likely. In the situation I was referring to, my opponent had no chance of winning. All he had was a bishop -insufficient material to mate. The fact that the USCF also recognizes this and would call it a draw validates my point.