my grandfather died in 1995 and i was told recently me and my 2 brothers were suppost to recieve something but never did

Unfortunately, if there was a probate or distribution from a trust of the estate back in 1995, then it is too late now to see if you should have received an inheritance.  You've missed the statute of limitations. If you were a beneficiary of a will or trust, or even if your grandfather didn't have a will or trust and you were entitled to a share of the estate, then you would have been notified.