Case Name: Chitra Vasant Savangikar & Anr. v. Patent Office of India & Anr.
Citation: 2025 SCC OnLine Bom 1765
Court: Bombay High Court
Bench: Justice Manish Pitale
Date of Judgment: 21 April 2025
Acts/Sections Referred: Patents Act, 1970, Sections 10 and 16
Case Type: IPR / Patent Law / Divisional Application / Single Inventive Concept
1. Introduction
The case of Chitra Vasant Savangikar & Anr. v. Patent Office of India & Anr. concerned a challenge to the Patent Office’s rejection of a divisional patent application relating to a Chlorophyllin composition. The Petitioners had originally filed a patent application for a Chlorophyllin-based pharmaceutical composition for kidney-related ailments, and subsequently filed a divisional application claiming broader therapeutic applications. The Patent Office rejected the divisional application on the ground that the parent application did not disclose more than one invention, which is the fundamental prerequisite for filing a valid divisional application under Section 16 of the Patents Act, 1970. The Bombay High Court was required to examine whether the requirements of a valid divisional application had been satisfied and whether the Controller of Patents had correctly applied Section 16 of the Patents Act, 1970.
2. Summary of Facts
In June 2017, the Petitioners filed an original patent application for a pharmaceutical composition containing Chlorophyllin, claiming that the formulation reduced creatinine levels and improved haemoglobin levels in patients with kidney-related ailments. While this parent application was pending examination, the Petitioners filed a divisional application in May 2020 relating to a Chlorophyllin composition with broader therapeutic applications and without the limitation to kidney-related treatment.
The Patent Office examined the divisional application and issued objections through the First Examination Report. The Petitioners responded to the objections and a hearing was conducted before the Controller of Patents. In September 2021, the Patent Office rejected the divisional application on the ground that the parent application did not disclose more than one distinct invention, as required by Section 16 of the Patents Act, 1970. Both the parent and divisional applications were found to relate to the same core invention of a Chlorophyllin-based composition. The Petitioners challenged this rejection before the Bombay High Court.
3. Issues Before the Court
(i) Whether the divisional application filed by the Petitioners could be validly maintained under Section 16 of the Patents Act, 1970, when the parent application from which it was divided did not disclose multiple distinct inventions.
4. Arguments by Both Parties
Arguments on behalf of the Petitioners:
The Petitioners contended that the divisional application had a different scope and claimed subject matter from the parent application, as it described broader therapeutic applications for the Chlorophyllin composition without limiting it to kidney-related ailments. They argued that the difference in claim formulation demonstrated the existence of multiple inventions within the parent application, and that the Controller had misapplied the relevant provisions of Sections 10 and 16 of the Patents Act, 1970 by focusing only on the common active ingredient rather than the different therapeutic applications.
Arguments on behalf of the Respondents:
The Patent Office and the second Respondent contended that both the parent and divisional applications related to the same core invention of a Chlorophyllin-based pharmaceutical composition and that the differences in claim formulation did not amount to the disclosure of multiple distinct inventions within the meaning of Section 16 of the Patents Act, 1970. The Controller had correctly found that the divisional application was not maintainable as no plurality of inventions had been disclosed in the parent application.
5. Reasonings and Findings
The Bombay High Court dismissed the petition and upheld the Patent Office’s rejection of the divisional application. The Court conducted a detailed analysis of Sections 10 and 16 of the Patents Act, 1970. Section 10 requires that each patent application must relate to a single invention or a group of inventions forming a single inventive concept. Section 16 permits the filing of a divisional application only when the parent application claims more than one invention.
The Court held that the fundamental prerequisite for a valid divisional application is that the parent application must actually disclose and claim multiple distinct inventions. The mere reformulation of claims or the broadening of the scope of claims between the parent and divisional applications does not by itself establish the existence of multiple distinct inventions. The central question is whether the inventive concepts underlying both applications are genuinely distinct, or whether they share a common inventive concept that merely finds different expression in differently worded claims.
The Court found that both the parent and divisional applications were directed at the same core inventive concept: a Chlorophyllin-based pharmaceutical composition with therapeutic properties. The differences in the specific therapeutic indications described and in the breadth of the claims did not establish that the parent application disclosed two or more distinct inventions. The Controller had correctly applied Section 16 of the Patents Act, 1970 in rejecting the divisional application.
6. Judgment and Conclusion
The Bombay High Court dismissed the petition and upheld the rejection of the divisional application. The judgment clarifies the requirements for a valid divisional application under Section 16 of the Patents Act, 1970, and confirms that the mere broadening or reformulation of claims between a parent and divisional application is insufficient to establish the existence of multiple distinct inventions warranting divisional filing. The parent application must genuinely disclose more than one inventive concept.
7. Frequently Asked Questions
Q1. What is a divisional patent application?
A divisional patent application is an application filed when a parent patent application claims or discloses more than one invention. Section 16 of the Patents Act, 1970 permits an applicant to divide the parent application into separate divisional applications, each directed to one of the disclosed inventions. A divisional application may be filed at any time before the grant of the parent patent.
Q2. What is the fundamental requirement for filing a valid divisional application?
The fundamental requirement is that the parent application must actually disclose and claim more than one distinct invention or a group of inventions not forming a single inventive concept. If the parent application contains only one invention or a group of inventions forming a single inventive concept, a divisional application is not maintainable.
Q3. What is a single inventive concept?
A single inventive concept refers to a technical relationship between claimed inventions that involves one or more of the same or corresponding special technical features. Inventions that share the same inventive core, even if expressed through differently worded claims or covering different applications, may form a single inventive concept and may not support divisional filing.
Q4. Can the scope of claims be expanded through a divisional application?
A divisional application may have different and potentially broader claims than the parent application, but the broadening of claims alone does not create a separate distinct invention for divisional purposes. The claimed invention in the divisional application must be genuinely distinct from the claimed invention in the parent application, not merely a broader version of the same concept.
Q5. What is the significance of Section 10 of the Patents Act, 1970 in this context?
Section 10 of the Patents Act, 1970 sets out the requirements for the complete specification of a patent application, including the requirement that the specification must disclose the invention clearly and fully. The Court applied Section 10 in conjunction with Section 16 to determine whether the parent specification had disclosed more than one distinct invention capable of supporting a divisional application.
