#estoppel

IP & Copyright

USPTO Ruling: IPR-Reexam Timing Squeezed by New Estoppel Rules

The USPTO just tightened the screws on patent challengers. A recent decision clarifies when estoppel kicks in for inter partes reviews (IPRs) and ex parte reexaminations, potentially disrupting common litigation tactics.

IP & Copyright

USPTO's Reexamination Loophole [2026]

They say you don't get a second bite at the apple. Except, apparently, if you're a patent challenger at the USPTO. This isn't strategy; it's structural rot.