Syngenta Limited v. Controller of Patents and Designs

Relevant Acts and provisions

Patents Act, 1970

Section 10(5)Section 16

Provisions considered: Section 16 of the Patents Act, 1970, on the plurality-of-inventions requirement for divisional applications.

Brief facts

A Single Judge, doubting the correctness of Boehringer Ingelheim International GMBH v. Controller of Patents, referred to a larger Bench the question whether the plurality of inventions required for a divisional application must be found in the parent's claims or is sufficient if disclosed in the specification. Syngenta's own divisional application on an agrochemical concentrate had been refused because its parent claims disclosed no plurality of invention.

Issues before the Court

1. Must the plurality of inventions required for a divisional application under Section 16 be reflected in the claims of the parent application, or does disclosure in the specification suffice?
2. Does the requirement differ where the divisional is filed voluntarily rather than to remedy a Controller's objection?

Court's findings

The Court held that Section 16(1) speaks of an invention disclosed in the provisional or complete specification, not one claimed; since a provisional specification may contain no claims at all, restricting divisional filings to inventions found in the parent's claims would make divisional filings impossible wherever only a provisional specification exists, an incongruous result.

The Court held that Section 16(1) draws no distinction between divisional applications filed voluntarily and those filed to remedy a Controller's objection; both are governed identically, and the plurality of inventions must be assessed by reference to the disclosures in the specification in either case.

The Court held that the maxim that what is not claimed is disclaimed governs infringement analysis and claim construction, not the maintainability of divisional applications, and on this basis disapproved the interpretation of Section 16 adopted in Boehringer Ingelheim.

Decision

Reference answered; the Division Bench overruled Boehringer Ingelheim and held a divisional application maintainable where the parent specification discloses a plurality of inventions.

Cases cited

• Boehringer Ingelheim International GMBH v. The Controller of Patents & Anr., 2022 SCC OnLine Del 3777

Authorities referred to in the decision. Please verify each citation in the judgment itself.

Keywords

Claim Construction Divisional Application Patent Prosecution Plurality Of Inventions Section 16