Q: I recently closed on my condo purchase. I signed a form called an estoppel certificate. The closer didn’t really explain well what it was. What is it that I signed? A: An estoppel certificate is a ...

2025 Summer Associates Zhuoxun Li and Kian Neishaboori contributed to this article. The estoppel provision of 35 U.S.C. § 315(e)(1) had largely prevented requesters from challenging claims of a patent ...

Estoppel certification in reexamination prevents relitigation of resolved issues. Estoppel’s “reasonably could have raised” standard requires exhaustive prior art searching and strategic planning. As ...

If you’re a renter of a multifamily property that has recently been sold, you may have been handed an estoppel certificate by your landlord for the first time and asked to sign it. If you’ve never ...