By Royal Hu
In recent years, the U.S. patent system has faced a new and controversial challenge: third parties using patent invalidation proceedings not to resolve genuine disputes over patent quality, but to extract settlement payments.
The most prominent example is the OpenSky v. VLSI saga, a case that has triggered regulatory intervention, judicial scrutiny, and broader reflections on the limits of procedural rights.
At its core, the case raises a fundamental question for modern patent systems: when does the lawful use of invalidation procedures cross the line into abuse?
The Background: From Patent Enforcement to Procedural Opportunism
The dispute originates from a high-stakes patent battle between VLSI Technology and Intel. In 2021, VLSI won a landmark patent infringement judgment against Intel in Texas, securing damages exceeding USD 2 billion. Intel responded by turning to the U.S. Patent Trial and Appeal Board (PTAB), seeking to invalidate the patents through Inter Partes Review (IPR) proceedings.
However, Intel’s IPR petitions were denied institution under the then-prevailing Fintiv doctrine, which allowed PTAB to decline review when parallel court litigation was already advanced.
This procedural denial created an unexpected opening.
Enter OpenSky: A Non-Practicing Challenger
Shortly after Intel’s failed attempt, a newly formed entity, OpenSky Industries, filed IPR petitions that were nearly identical to Intel’s. Because OpenSky was not a litigation defendant, it avoided the procedural hurdles that blocked Intel. The PTAB accepted OpenSky’s petitions, allowing the invalidation proceedings to move forward.
What followed, however, went far beyond ordinary patent strategy.
Evidence later showed that OpenSky approached both sides of the dispute. It contacted VLSI with proposals suggesting that, in exchange for payment, OpenSky could deliberately weaken its own case or withdraw from the proceedings. At the same time, it explored cooperation with Intel. In essence, OpenSky attempted to monetize its procedural position by threatening to destabilize the patents unless compensated.
An Unprecedented Response from the USPTO
This conduct drew sharp criticism from policymakers and regulators. The U.S. Patent and Trademark Office (USPTO), under then-Director Kathi Vidal, initiated a rare Director Review of the case.
The conclusion was striking: while OpenSky’s invalidity arguments were not frivolous on their face, its conduct during the proceedings amounted to a serious abuse of the PTAB process. The USPTO found that OpenSky had no genuine interest in patent quality or public benefit, but instead sought to use the administrative process as leverage for private gain.
As a result, the USPTO took extraordinary measures:
- OpenSky was removed from the IPR proceedings;
- Intel was allowed to step in as the lead petitioner despite earlier timing barriers;
- OpenSky was ordered to explain why it should not reimburse VLSI’s costs caused by its misconduct.
Importantly, the USPTO did not terminate the IPR entirely, acknowledging that the underlying invalidity issues might still serve the public interest if pursued by a legitimate party.
The Legal Debate: Petition Rights vs. Procedural Abuse
OpenSky appealed, arguing that its actions were protected under the Noerr-Pennington doctrine, a U.S. legal principle derived from the First Amendment that generally shields parties from liability when petitioning the government, even if their motives are self-interested.
Under established U.S. case law, a legal action is usually protected unless it qualifies as a “sham” proceeding, meaning it is objectively baseless and intended solely to harass or extort.
The USPTO’s position, however, draws a critical distinction: the right to initiate a proceeding does not include the right to abuse it once underway.
According to the agency, Noerr-Pennington may protect the act of filing a petition, but it does not immunize conduct such as violating procedural duties, attempting to manipulate evidence, or using the process itself as a bargaining tool. In OpenSky’s case, the misconduct occurred during the proceedings, not merely at their initiation.
This tension between constitutional petition rights and the authority of adjudicative bodies to police abuse now sits at the heart of ongoing appellate review.
Why This Case Matters
1. Defining the Limits of Open Invalidation Systems
Both the U.S. and China allow patent invalidation by parties without a direct economic interest. This openness promotes patent quality, but OpenSky exposes how such systems can be exploited if safeguards are insufficient.
2. A Warning to Speculative Actors
If the courts uphold the USPTO’s sanctions, it will send a clear signal: IPR is not a financial instrument for arbitrage, and petitioners who treat it as such risk exclusion and penalties.
3. Implications for Global Patent Strategy
For international companies, especially Chinese firms increasingly active in U.S. patent litigation, the case highlights a real risk: third-party invalidation threats designed to extract settlements. Awareness and early strategies are essential.
4. A Contrast with China’s Practice
China also allows broad access to patent invalidation, but similar speculative behavior has been rare. Lower damages, higher procedural costs, and stricter views on malicious litigation may explain the difference. Still, as cross-border patent enforcement grows, the OpenSky scenario offers a cautionary reference for future regulatory design.
Looking Ahead
Regardless of how the appellate courts ultimately rule, the OpenSky case has already reshaped the conversation around patent invalidation abuse. It underscores a broader principle relevant across jurisdictions: Legal procedures exist to resolve disputes and protect public interest, not to be weaponized as tools of extortion.
For policymakers, courts, and practitioners worldwide, OpenSky serves as a reminder that maintaining trust in IP systems requires not only open access, but also firm boundaries against bad-faith conduct.