IP Enforcement Strategy and When to Seek a Patent Injunction

Under 35 U.S.C. § 271, unauthorized making, using, selling, offering to sell, or importing a patented invention may constitute infringement when the statutory requirements are met.

The analysis starts with the patent's claims rather than the general similarity of competing products. A claim chart compares each asserted limitation with the accused product or process and identifies supporting technical evidence.

An intellectual property review should also examine:

• Patent ownership, expiration, and enforceable rights
• License agreements and restrictions on enforcement
• Prior art and foreseeable validity challenges
• Available technical evidence supporting infringement

Where ownership has changed through an assignment, the transfer documents and effective dates may affect who can pursue the claim.

A demand letter may identify infringement allegations and propose licensing, cessation, or another negotiated resolution. Sending one, however, can prompt the recipient to seek a declaratory judgment if an actual controversy exists.

Litigation becomes an option when the parties cannot resolve the dispute or require a binding determination of infringement and remedies.

A preliminary injunction serves a narrower purpose. It seeks to restrict disputed conduct while litigation continues, rather than waiting for a final judgment. Patent owners should weigh the urgency of the commercial harm against the evidence and resources needed to support that request.

The patent owner must establish a likelihood of success on the merits, including a persuasive infringement theory and a sufficient showing that the asserted claims can withstand relevant validity challenges.

The owner must also demonstrate likely irreparable harm without preliminary relief. Lost revenue alone may not justify an injunction when monetary damages can adequately compensate for the injury.

Evidence of price erosion, lost customers, damaged market position, or disrupted business relationships may support the request. The owner must connect the alleged injury to the infringing conduct rather than rely solely on general market losses.

Courts weigh the injury the patent owner may suffer without relief against the hardship an injunction could impose on the accused party.

Public interest considerations may include competition, access to essential products, and other consequences of restricting the technology.

An unexplained delay in requesting relief may weaken the claim of urgency, although no universal filing deadline automatically determines eligibility for an injunction.

Declining sales figures do not independently establish irreparable harm. The records should explain how the alleged infringement contributed to the injury and why damages may be inadequate.

Patent owners should preserve original technical files, dated communications, relevant agreements, and supporting financial records without altering their contents.

Rule 65(a) requires notice to the adverse party before a preliminary injunction may issue. A temporary restraining order without notice requires a separate showing of immediate and irreparable injury, together with compliance with Rule 65(b).

Under Rule 65(c), courts generally require appropriate security against costs and damages resulting from wrongful restraint, subject to applicable exceptions and judicial discretion.

An injunction must identify the restricted conduct with sufficient specificity. These procedural requirements can materially affect the scope and expense of the requested relief.

Before initiating civil litigation, patent owners should consider whether their available evidence supports an immediate motion or whether further investigation is necessary.

An accused infringer may dispute claim construction, deny infringement, or challenge patent validity under 35 U.S.C. §§ 102, 103, or 112.

Inter partes review (IPR) before the Patent Trial and Appeal Board (PTAB) provides a separate route for challenging patentability under §§ 102 or 103 based on patents or printed publications, subject to statutory requirements and institution procedures.

The PTAB does not decide infringement damages. District court litigation and PTAB proceedings can also affect one another, including through potential litigation stays.

Patent owners should assess relevant prior art and anticipated defenses before committing resources to emergency relief.

Under 35 U.S.C. § 284, successful infringement claims may support damages of at least a reasonable royalty. Lost profits may be recoverable when supported by the required evidence, while enhanced damages remain discretionary in qualifying cases.

A permanent injunction requires a separate equitable analysis. A successful infringement claim does not automatically entitle the owner to exclude the accused product from the market.

Licensing, settlement payments, or negotiated restrictions may provide practical alternatives, particularly when continued commercial use remains acceptable.

Under 28 U.S.C. § 1338(a), federal courts have exclusive jurisdiction over claims arising under federal patent law.

New York contract law may separately govern disputes involving patent licenses, payment obligations, or contractual ownership rights when applicable.

A disagreement over royalty payments does not automatically establish patent infringement. The underlying agreement, contractual obligations, and nature of the alleged violation determine the available claims.

For businesses using patent holding arrangements, assignment and licensing documents may also affect enforcement standing and the remedies available.