Litigation

Mirror Worlds Technologies, LLC v. Facebook, Inc. (renamed Meta Platforms, Inc.)

dismissed; judgment of non-infringement affirmed on appeal

1:17-cv-03473-JGK

Court: U.S. District Court for the Southern District of New York
Filed: 2017-05-09
Terminated: 2022-03-07

Patents at issue (3)

Plaintiffs (1)

π Mirror Worlds Technologies, LLC

Defendants (1)

Δ Facebook, Inc. (renamed Meta Platforms, Inc.)

Summary

Mirror Worlds Technologies, LLC sued Facebook, Inc. (now Meta Platforms, Inc.) in S.D.N.Y. alleging that News Feed, Timeline, and Activity Log features infringed U.S. Patents 6,006,227, 7,865,538, and 8,255,439. The district court granted summary judgment of non-infringement and dismissed on March 7, 2022; the Federal Circuit affirmed on December 4, 2024.

Case overview & background

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Key legal developments & outcome

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Plaintiff representatives

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Defendant representatives

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Record id: 8255439-1-17-cv-03473-jgk · edit in Admin

Further reading

AI prior art search tools: a 2026 buyer's guide for defendants
AI doesn't replace a patent attorney's judgment. It does replace the search step that used to cost $20,000 and take three weeks.
What it costs to get a patent (AIPLA Economic Survey)
A US utility patent costs a median of $8,000-$12,000 in attorney fees to draft and file, depending on the technology — before USPTO fees, before drawings, and before the first office action. Here's the full bill, and why it's a rounding error next to enforcing the thing.
How to obtain a patent
The USPTO process takes 2-3 years and costs $10,000-$15,000. The patent that comes out the other end is only as valuable as your willingness to spend much more enforcing it.
Alice Corp. v. CLS Bank International (2014)
Bolting 'on a computer' onto an abstract business process doesn't make it patentable. Most software and business-method patents that look like 'doing X on a computer' don't survive when seriously challenged under Alice.
TC Heartland LLC v. Kraft Foods Group Brands LLC (2017)
Pre-TC Heartland, plaintiffs sued in plaintiff-friendly E.D. Tex. by default. Post-TC Heartland, venue is a real defense — and Delaware is where most U.S. patent cases land.

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