Patent Invalidity Search for U.S. Companies: How to Scope It

Start from the IPR boundaries, then scope the search

Scope a U.S. invalidity search around the challenge route counsel expects to use. The USPTO describes inter partes review (IPR) as a proceeding limited to grounds under §§ 102 or 103, and only on the basis of prior art consisting of patents or printed publications. [1] Those statutory limits—not a vendor’s service menu—should set the first boundaries of the brief.

• Grounds: IPR reviews patentability only on §§ 102 or 103 grounds; other theories require assessment through a different route. [1]
• Evidence types: Only patents and printed publications can serve as the IPR basis, so ask the searcher to label which references fall into those categories. [1]
• Institution threshold: Institution requires a showing of a reasonable likelihood that the petitioner would prevail on at least one challenged claim. [1] A search brief should therefore target specific claims and limitations.

Invalidity search versus infringement search

BHW/PatentLaw.us describes prior art generally as information publicly available before an application’s effective filing date, in forms such as patents, scientific publications, trade journals, dissertations, books or videos, and treats previously offered-for-sale products as prior art too. [7] It describes a litigation-related invalidity search as one aimed at identifying prior art that may render one or more claims of a granted patent invalid. [7]

IIPRD’s Infringement Search page can be used to see how the other type of search differs: it describes mapping claim limitations to evidence that a product, process or technology may fall within the patent’s claims, with the final infringement determination left to the client’s patent counsel. [9] That is product-to-claim mapping, not a dated prior-art review, so do not commission an infringement search when the question is validity. [9]

Neither page publishes independently verified outcome rates, so use them to define search types, not to rank providers. [7][9]

Write a claim-specific, date-specific search brief

Commission a search around identified claims, not a patent title alone: the USPTO describes inter partes review (IPR) as reviewing the patentability of one or more claims. [1] Use this checklist as recommended instructions, not as any supplier’s intake requirements.

• Identify the target and context. Supply the asserted U.S. patent number, claims counsel wants reviewed, accusation or licensing correspondence, available prosecution and priority records, known references, and procedural deadlines. Do not leave these inputs for the searcher to assume.
• Have counsel approve the dates. BHW describes prior art generally by reference to public availability before an application’s effective filing date; do not use that description as a universal cutoff. [7] Ask counsel to specify the relevant date for each claim where dates differ. Instruct the searcher to flag uncertain chronology rather than silently exclude or accept a reference.
• Separate patent and non-patent coverage. BHW identifies patents, scientific and trade publications, dissertations, books and videos as potential publications, and also discusses previously offered-for-sale products. [7] Ask the proposal to identify which categories are included, optional or excluded; do not assume the list defines every engagement.
• Set the search boundaries. Request agreed technical boundaries, languages, geographic coverage, exclusions and treatment of references already known to counsel. Specify whether known references should be mapped, used as search leads or excluded from the count of new findings.

Name the purchased task explicitly: BHW distinguishes validity/invalidity searching from state-of-the-art landscape and freedom-to-operate searches. [7] Have counsel identify the intended challenge route before prioritizing evidence: IPR is limited to §§102/103 grounds based on patents or printed publications. [1]

Request claim-linked evidence with traceable dates

Ask for an agreed evidence schedule linking each reference to the claim and specific limitation it may address—not a bibliography alone. Treat the fields below as requested acceptance specifications, rather than assumed vendor commitments.

• Claim relevance: Request the claim number, limitation, pinpoint passage, figure or other supporting material, and an explanation of the proposed connection. Ask for missing limitations and inferential connections to be flagged explicitly.
• Reference identity: Request a reference identifier, source link and a copy where available, so counsel can inspect the underlying material rather than rely only on a summary.
• Chronology: Request the reported publication date, the basis for that date, the access date and unresolved questions about public accessibility. Keep the date printed on a document separate from evidence supporting when it became publicly available.

Ask the searcher to distinguish potentially relevant findings from missing claim support and unresolved chronology. Confirm provenance documentation and the proposed invalidity-chart format with the provider in writing. Have counsel specify appropriate archive records, translations, metadata, corroboration or preservation work, and agree on how unresolved items will be labeled.

What to confirm with any search provider

Ask any provider you consider to confirm prices, fee components, minimum spend, turnaround, search-hour or deliverable limits, geographic coverage, contract duration, and cancellation/refund terms. Request a written proposal covering:

• Total cost: Base fees, minimum commitment, extras and approval for additional charges.
• Schedule: Milestones, delivery deadlines and dependencies.
• Coverage and limits: Included claims, geographic coverage, reference limits, search hours, stopping criteria and revision rounds.
• Outputs: File formats, evidence attachments and whether counsel review is included.
• Responsibilities: Who manages subcontractors and resolves missing or incomplete deliverables.
• Exit terms: Contract duration, cancellation rights, refunds and payment for work already completed.

Request explicit exclusions and a scope-change approval process: BHW says search breadth and depth depend on circumstances, objectives and budget. [7] Before commissioning, have counsel approve the claims and dates, the provider confirm the evidence deliverables, and the company accept the commercial terms.

Separate useful findings from an IPR decision

A useful reference is an input to counsel’s assessment, not an invalidated claim. BHW describes comparing results with asserted claims, after which an attorney may provide a validity or patentability opinion. [7] Evidence delivery remains separate from filing an IPR petition or obtaining institution. [1]

The patent-or-printed-publication restriction means not every item uncovered by a broad invalidity search can independently serve as an IPR basis. [1] Counsel should separate potentially usable IPR evidence from material requiring assessment through another appropriate route.

USPTO describes distinct procedural steps and an institution threshold:

• A third party other than the patent owner files a petition with the Patent Trial and Appeal Board (PTAB). [1]
• The patent owner may submit a preliminary response. [1]
• Institution requires a reasonable likelihood the petitioner would prevail on at least one challenged claim; a completed search or chart does not itself establish that threshold has been met. [1]

The IPR procedure took effect September 16, 2012. [1] Before proceeding, ask counsel to verify applicable petition requirements, case-specific deadlines and the appropriate challenge route, including relevant district-court standards. The search handoff should make claim relevance, chronology and unresolved questions easy to inspect—not imply a challenge has already succeeded.