Invalidation / Opposition – Evidencer to Challenge or Defend
Targeted prior art searches to neutralize blocking patents, support litigation, and strengthen negotiations. We help you protect your innovations by providing clear and defensible invalidation evidence when patent validity is questioned.
Introduction
An Invalidation Search (also called Opposition Search) identifies prior art published before a patent’s priority date to challenge its novelty or inventive step. This type of search is used in litigation, licensing negotiations, and opposition proceedings where patent validity becomes critical to business decisions.
Why Choose Invalidation?
Opposition search service provide the evidence you need to defend, negotiate, or overcome patent barriers with confidence in high-stakes situations.
When Do You Need Invalidation and Opposition Evidence?
Invalidation analysis is essential in high-stakes scenarios where patents directly affect your freedom to operate. At Novel Patent Services, we support these critical situations by helping you evaluate risks and options with clarity.
Blocked by Competitor Patent
Licensing Negotiations Leverage
Patent Challenges Strengthened
Our Process – Step by Step
Identify Claims
Select patent claims to be challenged.
Global Search
Review patent & non-patent prior art worldwide.
Priority Date Focus
Target references before the filing date.
Claim Mapping
Align prior art with claim language.
Detailed Analysis
Provide claim-by-claim breakdown.
Legal Leverage Points
Summarize strengths for litigation or negotiation.
Sample Report Snapshot
Explore our sample patentability reports to see our thorough analysis and insights.
Deliverables
- Word Report – Detailed claim mapping and conclusion.
- Excel Dataset (Optional) – Extended prior art references with legal status.
- Strategy Note – Clear recommendations for litigation or negotiation strategy.
What Our Clients Say
Blogs & Insights
Stay updated with the latest patent tips and industry news.
How Startups Can Protect Their Innovations from IP Infringement
When Can Startups Use ‘Patent Pending’? The Essential Guide
How Startups Protect Their Brand: U.S. Trademark Filing Guide
How to File an International Patent: PCT & Paris Convention Guide
How to Reduce Patent Filing Costs: Tips for Independent Inventors
How to Write Patent Claims: Risks of Skipping Professional Help
Strengthen your legal position with powerful invalidation evidence.
Ready to challenge or defend a patent? Our expert team provides comprehensive invalidation evidence to support your legal strategy.
FAQ'S
Patent invalidation is the process of challenging the validity of an issued U.S. patent by presenting prior art or legal grounds showing that the patent should not have been granted under 35 U.S.C. §§102, 103, 112, or 101.
In the USA, patents can be challenged using:
Inter Partes Review (IPR) – at the PTAB
Post-Grant Review (PGR) – within 9 months of issuance
Ex Parte Reexamination – request USPTO to reexamine claims
Reissue Proceedings
District Court litigation
Your choice depends on timing, budget, and legal grounds.
IPR is a USPTO trial process where you challenge a patent’s validity based on printed prior art (patents, publications) showing obviousness or lack of novelty.
It is handled by the Patent Trial and Appeal Board (PTAB).
You can file a PGR within 9 months of the patent grant date.
Unlike IPR, PGR allows more grounds, including:
101 (subject-matter eligibility)
112 (written description / enablement issues)
102 / 103 (prior art)
This is a USPTO process where anyone can anonymously request reexamination of a patent based on new prior art.
USPTO reopens examination without the challenger participating in the hearing.
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