When property reverts to the state after
a person dies without leaving a valid will and
without heirs, or when property is abandoned.
Merriam-Webster Online Dictionaryescheat
property - escheated
a) the reversion of lands in English feudal law to the lord of the fee when there are no heirs capable of inheriting under the original grant
b) the reversion of property to the crown in England or to the state in the United States when there are no legal heirs
to cause to revert by escheat to revert by escheat