Revocation of Patents in India

A patent grants exclusive rights over an invention, allowing the patent holder to make, use or sell the invention within India. These rights are granted only after the invention satisfies core legal requirements such as novelty, inventive step and industrial applicability. 

However, even after a patent is granted, its validity can be questioned. The law recognises that some patents may have been granted wrongly or may no longer serve public interest. In such situations, the patent can be cancelled. This process is known as revocation of a patent.

Revocation acts as a corrective mechanism. It ensures that only genuine inventions remain protected, and that patents obtained through misrepresentation, nondisclosure or non-compliance do not continue to hold legal force. The Patents Act, 1970 contains detailed provisions on when and how a patent may be revoked. 

These provisions strengthen the patent system by maintaining its credibility, transparency and fairness.

Meaning of Patent Revocation

Patent revocation refers to the cancellation of the rights granted to a patent holder. Once revoked, the patent is treated as if it had never been granted, and all exclusive rights come to an end. Revocation proceedings may be initiated by:

• Any person interested,
• The Central Government, or
• Through a counterclaim in an infringement suit before the High Court.

Revocation ensures that patents which fail to meet statutory requirements do not restrict competition, innovation or public access.

Grounds for Revocation under Section 64

Section 64 of the Patents Act, 1970 lays down an exhaustive list of grounds on which a patent can be revoked. These grounds safeguard the patent system from wrongful grants.

Earlier Claim in an Existing Patent

A patent may be revoked if the invention was already claimed in another Indian patent with an earlier priority or filing date. This prevents double protection for the same invention.

Patent Granted to an Unentitled Person

If the patent was granted to a person who was not legally entitled to apply for it, the rightful person may seek revocation.

Wrongful Obtaining

If the invention was wrongfully obtained from the true inventor, the person entitled to the invention can seek cancellation. This ensures that intellectual property rights remain with the rightful owner.

Subject-Matter Not an Invention

The invention must qualify as an “invention” under Section 2(1)(j). If it does not involve novelty, inventive step or industrial applicability, the patent becomes liable for revocation.

Lack of Novelty

If the invention was publicly known, publicly used, or published anywhere before the priority date, the patent lacks novelty. This includes earlier publications, public demonstrations, or commercial use.

Obviousness or Lack of Inventive Step

A patent may be cancelled if the invention is obvious to a person skilled in the related field. The law anticipates that simple or predictable variations should not receive patent protection.

Prior Secret Use in India

An invention secretly used in India before the priority date, except for reasonable trials or Government-authorised use, can be a ground for revocation.

Invention Not Useful

If the invention does not work or does not deliver the expected results, it is considered not useful. Such a patent is vulnerable.

Inadequate or Insufficient Disclosure

The patent specification must clearly describe the invention and the method of performing it. Revocation may occur if:

• The description is insufficient for a skilled person to carry out the invention;
• The best method known to the applicant is not disclosed;
• The claims are not clear or not fairly based on the disclosed matter.

Proper disclosure is essential because patents function as a trade-off: exclusive rights in exchange for complete disclosure.

Patent Obtained by False Suggestion

If the patent was secured through misrepresentation or false statements, it may be revoked. This includes false or misleading technical claims.

Non-Patentable Subject-Matter

If the invention falls within the exclusions under Section 3 or Section 4 (such as discoveries, traditional knowledge, or inventions relating to atomic energy), the patent is not legally valid.

Failure to Disclose Biological Material Source

If the complete specification fails to disclose or wrongly mentions the source or geographical origin of biological material, it becomes a ground for revocation.

Traditional Knowledge

If the invention was anticipated by traditional knowledge available in any indigenous community within India or elsewhere, the patent can be revoked. Traditional knowledge cannot be monopolised through patents.

Non-Disclosure of Foreign Applications (Section 8 Violations)

If the applicant conceals information about corresponding foreign patent applications or provides false details, revocation may follow.

Violation of Secrecy Directions or Filing Abroad Without Permission

Failure to comply with secrecy directions under Section 35 or filing an application outside India without obtaining prior permission under Section 39 may lead to revocation.

Fraudulent Amendment of Specifications

If the specification is amended fraudulently under Section 57 or Section 58, the patent becomes liable for cancellation.

Other Legal Mechanisms Related to Revocation

Apart from Section 64, the Patents Act provides additional legal avenues through which the validity of a patent may be challenged.

Post-Grant Opposition (Section 25(2))

Any person interested may file a post-grant opposition within one year from the date of publication of the patent. Grounds are similar to Section 64, including:

• Prior claiming
• Lack of novelty
• Lack of inventive step
• Non-patentable subject matter
• Wrongful obtaining
• Insufficient description
• False information
• Failure to disclose biological material source
• Anticipation by traditional knowledge

This mechanism provides a speedy, administrative remedy before resorting to full revocation proceedings.

Revocation for Atomic Energy-Related Inventions (Section 65)

If the Central Government believes that the invention relates to atomic energy and cannot be patented under the Atomic Energy Act, 1962, it may direct the Controller to revoke the patent. The patent holder is given an opportunity to be heard before final action is taken.

Revocation in Public Interest (Section 66)

Under Section 66, the Central Government may revoke a patent if its use or mode of exercise is harmful to the State or prejudicial to public interest. This power is exercised rarely and only in exceptional circumstances.

A notable example is the revocation of the Avesthagen “Jamun Patent”, where a composition involving jamun, lavangpatti and chundun for diabetes treatment was cancelled because it relied on traditional knowledge and was considered prejudicial to public interest.

Revocation for Non-Working of Patent (Section 85)

If a compulsory licence has been granted and two years have passed since its grant, the Central Government or any interested person may seek revocation on grounds such as:

• The invention is not worked in India;
• Public requirements are not met;
• The invention is not available at a reasonably affordable price.

Revocation under this section promotes access, particularly in essential sectors such as pharmaceuticals.

Importance of Patent Revocation in India

The mechanism of revocation plays an important role in maintaining the balance between innovation and public welfare. It ensures the following:

• Wrongly granted patents do not create monopolies.
• Only inventions meeting statutory standards remain protected.
• Public interest prevails over private rights when required.
• Traditional knowledge, biological resources and public health are safeguarded.
• Patents are worked in India and used to meet public requirements.

Revocation therefore acts as a quality-control tool within the patent system.

Conclusion

Revocation of patents in India is a vital legal process that ensures that patent protection is given only to inventions that are truly new, inventive and useful. The Patents Act provides multiple grounds and procedures through which interested parties or the Government may challenge patents that fail to meet statutory standards. Provisions such as Section 64, Section 66 and Section 85 reflect the Indian legal system’s strong emphasis on fairness, public interest and accountability.