The property was bought by both Mrs and Mr Mrs Has paased away and Mr now claims this to be his house no new transfer od the deed has been done is this right

What is the exact wording of the owners on the deed (leave out the actual names)?
Common terms might be John Doe and Jane Doe as tenants in common, or joint tenants in common, or with right of survivorship. Sometimes there is nothing but the two names, so tell us what state this is in.

As joy said, if the deed was right of survivorship, then yes. Even if the deed was in common, it still might be his by will or laws of inheritance.

However, he still has to file for a new deed to remove her name.