Inter Partes Review (IPR): What It Is & How the Process Works

Navigating the world of patent law requires an understanding of many complex processes. One such example is the Inter Partes Review (IPR) proceeding. This administrative proceeding is an alternative to traditional patent litigation, often proving to be faster and less expensive. Understanding the timeline is crucial, as from petition to final written decision, this will typically conclude within 12 to 18 months. Whether you’re an inventor, patent holder, or simply interested in patent law, this guide will provide valuable insights into the IPR process.

What is Inter Partes Review?

Inter Partes Review (IPR) is a procedure used to challenge the validity of patent claims. It allows third parties to review the patentability of one or more claims post-grant. Started in 2012 by the America Invents Act (AIA), IPR was introduced to streamline patent disputes. It aims to make patent challenges more efficient and less costly. The process takes place at the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office (USPTO). Its primary purpose is to re-examine the patentability of claims based on prior art consisting of patents or printed publications, ensuring only valid patents are maintained.

Historical Context

Before the AIA, the primary administrative mechanism for challenging patents was inter partes reexamination. However, this process was often criticized for its inefficiencies and limited scope. The AIA sought to address these shortcomings by introducing IPR, alongside other post-grant review procedures. IPR was designed to be a more robust, trial-like proceeding, offering a faster resolution and a higher standard of review. Its introduction marked a significant shift in U.S. patent law, providing a powerful new tool for challenging patent validity outside of federal courts.

The Inter Partes Review Process

The Inter Partes Review process is a streamlined approach to addressing patent validity. Here’s how it generally works:

1. Petition Filing: Any third party, except the patent owner, can file a petition to initiate an IPR.
2. Preliminary Response: The patent owner may respond to the petition to present arguments why the IPR should not proceed.
3. Institution Decision: The PTAB decides whether to proceed with the review, based on whether there is a reasonable likelihood that the petitioner would prevail.
4. Trial and Hearing: If instituted, both parties present their arguments, evidence, and engage in discovery.
5. Final Decision: Within one year of the decision to institute an IPR, the PTAB is statutorily required to issue a final written decision.

Determining the validity of claims through the process can go a long way in resolving a potential conflict without the expense of addressing all other issues that may be raised during patent litigation.

Initiating and Navigating an IPR: Requirements and Procedures

Starting an Inter Partes Review (IPR) involves several key steps and specific requirements. Understanding these is important when deciding whether to proceed with an IPR.

1. Who Can File: Any third party (someone other than the patent owner) can file a petition to initiate an IPR. The petitioner must wait to file the petition until the later of (i) nine months after a patent grant, or (ii) after any post-grant review has terminated.
2. Challenged Claims and Grounds: The petitioner must identify all claims to be challenged and all grounds on which each claim is based.
3. Basis for Challenge: The petitioner may only challenge claims as being anticipated by or obvious in view of prior patents or printed publications.
4. Burden of Proof for Institution: The petitioner must demonstrate a reasonable likelihood of success on at least one challenged claim for the PTAB to institute the IPR.
5. Patent Owner’s Preliminary Response: The patent owner can file a preliminary response to the petition to institute the IPR. This response is crucial, as it counters the petitioner’s arguments.
6. PTAB Institution Decision: Once both the petition and response are reviewed, the PTAB decides whether to institute the IPR. This decision is final and non-appealable.

The Role of the Patent Trial and Appeal Board (PTAB)

The Patent Trial and Appeal Board (PTAB) is an administrative tribunal which handles IPR proceedings. The PTAB is composed of the USPTO Director, Deputy Director, Commissioner for Patents, Commissioner for Trademarks, and Administrative Patent Judges. The Administrative Patent Judges have expertise in technology and patent law and are the primary officiants of IPR proceedings.

The PTAB first determines whether to institute an IPR after a thorough evaluation of the third-party petition and patent owner’s response. Upon instituting an IPR, the PTAB oversees the schedule and manages the IPR through the final decision. The PTAB’s assessment of patentability is based on a preponderance of the evidence standard, meaning the petitioner must show that it is more likely than not that the challenged claims are unpatentable. The PTAB’s final written decision will either confirm the patentability of the challenged claims, cancel them, or allow amended claims.

Claim Construction

Claim construction is a critical aspect of patent law, involving the legal interpretation of the scope and meaning of the claims in a patent. Claims define the exclusive rights granted by the patent. In district court litigation, claims are typically construed using the “Phillips” standard, which generally gives claims their ordinary and customary meaning to a person of ordinary skill in the art at the time of the invention.

In proceedings, the PTAB historically applied a different claim construction standard known as the “broadest reasonable interpretation” (BRI). Under BRI, claims were given their broadest reasonable meaning in light of the patent’s specification. This standard was generally considered more favorable to petitioners challenging patent validity. However, as of May 2018, the USPTO adopted the “Phillips” standard for IPRs, aligning it with the standard used in federal courts. This change aimed to harmonize claim construction across different venues and has significant implications for both petitioners and patent owners in IPR proceedings.

Inter Partes Review Timeline

The IPR process is designed to be expeditious. By statute, the PTAB must issue a final written decision within 12 months of institution though a six-month extension is possible for good cause. This statutory timeline ensures a relatively swift resolution compared to the often multi-year duration of district court litigation.

Factors Affecting the Timeline

While the 12-month statutory deadline is generally adhered to, several factors can influence the actual pace. These include the complexity of the technology, the number of claims challenged, the volume of evidence submitted, and any requests for extensions or procedural motions. Despite these variables, the IPR remains a significantly faster option for patent validity challenges.

Impact On Patent Litigation

While an IPR may result in a stay of pending litigation, this is not always guaranteed. District courts have discretion to grant a stay, considering factors such as the stage of the litigation, whether a stay would unduly prejudice the non-moving party, and whether a stay would simplify the issues in litigation. A stay can temporarily halt the district court proceedings, allowing the PTAB to first rule on the patent’s validity, which can streamline or even resolve the district court case. However, if a stay is not granted, the parties may face parallel proceedings, leading to increased costs and complexity.

The arguments presented (or not presented) in an IPR can also profoundly impact the ability to pursue future litigation. The doctrine of “estoppel” plays a crucial role here. Upon conclusion, the petitioner (and parties in privity with the petitioner) may be estopped from asserting in future district court litigation or other PTAB proceedings any invalidity ground that was raised or could have been raised during the IPR. This means that a petitioner must carefully consider all potential invalidity arguments before initiating, as failing to raise a ground that could have been raised could preclude them from using it later. This estoppel provision encourages thoroughness in proceedings and aims to prevent serial challenges to patent validity.

Appeals and Settlements

The final decision can be appealed. An appeal is brought before the United States Court of Appeals for the Federal Circuit to permit judicial review.

Parties in an IPR proceeding may also reach a settlement prior to a final decision. The parties must submit a motion to terminate proceedings. While such a motion will typically terminate the proceedings, granting the motion is at the discretion of the PTAB, and the PTAB may still proceed to issue a final decision.

Conclusion

Inter Partes Review has fundamentally reshaped the landscape of patent litigation and validity challenges. It offers a specialized, efficient, and often faster administrative alternative to district court proceedings for challenging patentability based on prior art.

Navigating the complexities of Inter Partes Review (IPR) can be challenging. If you’re facing an IPR review or need expert guidance on patent litigation matters, the experienced intellectual property attorneys at Boyle Fredrickson are here to help. Contact Boyle Fredrickson today for strategic advice and representation in all aspects of IPR and patent law.