Can a patent be invalidated after it's been granted? | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		tareqak on Aug 8, 2019 \| parent \| context \| favorite \| on: Facebook has been granted patent on shadow banning Can a patent be invalidated after it's been granted?

patentatt on Aug 8, 2019 [–]

Yes. Through the PTO (reexam, IPR, other PTAB proceedings) or through a federal court. Happens every day.

saint_abroad on Aug 9, 2019 | [–]

PTO invalidation happens every day but takes /years/ to process.

Until then, frivolous patent holders have free rein to coerce contracts that licence claims they know won't stand re-examination.

https://www.ipwatchdog.com/2017/02/17/federal-circuit-affirm...

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact