What happens when a deed is unclear and the parties to a transaction involving oil and gas interests are long deceased? How do the heirs to the parties involved resolve their disputes? This is a ...

Let’s talk the Duhig Rule and estoppel by deed in Texas. Don’t run away yet. We’ll get to the point quickly and then you can leave. Under the doctrine of estoppel by deed: “All parties to a deed are ...

“’It is time for this court to consider en banc the doctrine of assignor estoppel as it applies both in district court and in the Patent Office’ in order to clarify this ‘odd and seemingly illogical ...

“A retrospective change would mean a windfall for assignors and radically undercutting the return on the deal for a quarter century’s worth of assignees.” – Matthew Wolf, arguing for Hologic The U.S.