Patent audit: how can you secure and maximize the value of patents after filing?
Introduction
A patent is a strategic asset when it protects useful technology, supports a competitive advantage and can be exploited, enforced or monetized. Filing and grant do not guarantee lasting value: a patent may remain in force while becoming misaligned with the company’s products, markets or strategy.
A patent audit compares the legal and technical position of a patent or portfolio with the company’s actual business strategy. It identifies rights to secure, strengthen, exploit, license, sell or, where justified, allow to lapse. It extends the logic of active trademark and patent portfolio management.
What is a patent audit?
A patent audit is a legal, technical and strategic review of a single patent or a portfolio. It covers ownership, administrative status, claim scope, patent families, related agreements, actual use of the technology and monetization opportunities.
It should answer four core questions: does the company own the rights? Are they in force and enforceable? Do they protect the technologies that currently create value? Are the cost and territorial scope still consistent with the relevant markets?
Why conduct a patent audit after filing?
Filing a patent starts a management phase. An audit moves the company from holding patents to managing them strategically, distinguishing core rights, peripheral patents, protection gaps and assets that may create value through licensing, assignment agreements or collaboration.
Technology roadmaps change: an initially secondary feature may become essential, while a historical patent may no longer cover the commercial product. IP audit and valuation therefore require regular alignment between law, technology and the business model.
For further information on the reasons for conducting a patent audit, we invite you to read our article: " Why conduct an audit of trademarks and patents? "
Why is a filed or granted patent not a static asset?
The filing or grant of a patent does not mark the end of the protection process. A patent must be monitored over time to ensure that it remains relevant in light of the company’s activities, technological developments and competitive environment.
Such monitoring also involves ensuring compliance with the main formalities required to keep the patent in force, in particular the payment of renewal fees to the INPI.
A patent should therefore not simply be retained in a portfolio: it should be regularly reassessed and integrated into an overall strategy for the protection, exploitation and enhancement of innovations.
What should be reviewed during a patent audit?
Ownership and chain of title
The first step is to verify the actual owner of the patent. Employee inventions are governed by the regime set out in Article L. 611-7 of the French Intellectual Property Code ; and the INPI stresses the importance of declaring employee inventions. For contractors, R&D partners or acquired businesses, the audit should verify assignments and the contractual chain, together with recordals required for third-party effect.
Validity and administrative status
The review covers filing and priority dates, renewal fees, deadlines, oppositions, limitations, licences and security interests. Official renewal-fee status and register extracts help reconcile internal records with public data.
Scope of the claims
The value of a patent depends on what its claims actually cover. A patent audit compares those claims with the product or process being exploited in order to identify unprotected features, overly narrow claims, potential design-around opportunities and, where appropriate, areas of vulnerability in the event of opposition or invalidity proceedings.
Business and territorial alignment
Each patent should be linked to a product, technology, R&D program or defensive objective. This mapping reveals unused rights, unprotected innovation and overlaps, while showing whether the protected countries still correspond to sales, manufacturing or competitive-risk territories.
Monetization opportunities
A patent may generate value through direct exploitation, licensing, sale, collaboration or its role as a barrier to entry. WIPO describes income, market and cost approaches to valuation. The audit prepares that economic valuation by first confirming the asset’s existence, ownership and exploitability.
When is a patent audit particularly useful?
A patent audit becomes especially important when third parties will scrutinize the portfolio or when its quality will influence a strategic decision, including:
- before a fundraising round, merger or acquisition, or asset sale;
- before a technology partnership, licence or co-development arrangement;
- before a product launch, to confirm that the available protection still matches the technology being commercialized;
- in the context of litigation, an infringement threat or a validity challenge;
- during a portfolio reorganization or a renewal-cost reduction program.
What benefits does a patent audit bring to a business?
A well-designed audit produces an action plan, not merely an inventory. It secures ownership, reduces administrative risk, aligns claim scope with the technology actually used and supports renewal-cost decisions. It also makes the portfolio clearer to management, investors and partners.
Most importantly, patents can be classified as rights to maintain and enforce, strengthen, license or sell, or no longer maintain. This prioritization supports a patent strategy aligned with the company’s actual trajectory.
Conclusion
A patent audit confirms that a portfolio remains legally robust, technically relevant, administratively controlled and economically useful. After filing, value depends on the quality of ongoing management as well as the original protection. Regular review turns the portfolio into a tool for risk control, negotiation and innovation value creation.
Dreyfus Law Firm assists its clients in managing complex intellectual property cases, offering personalized advice and comprehensive operational support for the complete protection of intellectual property.
Dreyfus Law Firm works in partnership with a global network of attorneys specializing in Intellectual Property.
Nathalie Dreyfus, with the assistance of the entire Dreyfus team.
Q&A
Does a patent audit replace a freedom-to-operate (FTO) analysis?
A patent audit primarily assesses the quality and usefulness of the company’s own rights. An FTO analysis looks outward, identifying third-party patents that may restrict the commercialization of a product or process. The two exercises are complementary, particularly before a launch or investment transaction.
Can a granted patent still be considered weak during due diligence?
Grant creates an enforceable right but does not eliminate every later challenge. Due diligence may revisit the chain of title, claim scope, relevant prior art, pending proceedings and the fit between the patent and the technology presented as strategically important.
Can an imperfect chain of title be regularized after grant?
In many situations, assignments, confirmatory documents or register entries may still be completed, subject to the specific legal position and any rights already acquired by third parties. The purpose of the audit is to identify these gaps early enough to determine the appropriate corrective measures.
Should a patent be abandoned if it is not directly used in a product?
A patent that is not currently embodied in a product may still have defensive value, block design-arounds, protect future technology or support a licensing strategy. The renewal decision should compare that strategic utility with the cost of maintaining the right and the realistic prospects for exploitation or monetization.
How should a portfolio combining French, European, Unitary and international patent families be audited?
The review should proceed title by title and family by family, covering status, actual territorial coverage, deadlines, recorded ownership, applicable claims and future costs. A PCT application, a European patent validated in several states and a Unitary Patent do not have the same territorial effects or maintenance regime, so the audit map must distinguish each route.
This publication is intended for general public guidance and to highlight issues. It is not intended to apply to specific circumstances or to constitute legal advice.

















