Delhi High Court Quashes Patent Refusal for Introducing New Grounds Without Hearing, Orders Fresh Consideration
Introduction
The Delhi High Court set aside a patent refusal order passed against Wirtgen GmbH, holding that introduction of new technical objections for the first time in the final order violates the principles of natural justice. Justice Manmeet Pritam Singh Arora observed that such an approach deprives the applicant of a fair opportunity to respond and renders the decision procedurally unsustainable.
Factual Background
Wirtgen GmbH had filed a patent application relating to a specialized bit holder and base part for milling machines, with the claimed invention focusing on a unique structural alignment and orientation of support surfaces. The Patent Office, however, rejected the application citing lack of inventive step and other technical deficiencies.
The applicant contended that the refusal was arbitrary, particularly since the Controller acknowledged that key prior art documents (D1–D3) did not disclose the claimed invention, yet concluded obviousness without properly analysing how a fourth document (D4) led to such a conclusion.
Procedural Background
The Assistant Controller of Patents issued a final refusal order dated November 25, 2019. The applicant challenged the decision before the Delhi High Court, arguing that several objections relied upon in the final order were never raised in the First Examination Report (FER) or during the hearing process.
Issues
1. Whether introduction of new objections in the final refusal order violates principles of natural justice.
2. Whether the rejection for lack of inventive step was supported by a reasoned technical analysis.
3. Scope of procedural fairness in patent examination under the Patents Act.
Contentions of the Parties
The applicant argued that the Patent Office introduced new objections relating to claim scope and terminology for the first time in the final order, thereby denying an opportunity to respond, amend claims, or clarify specifications. It further contended that the finding of lack of inventive step was unreasoned and failed to properly analyse prior art.
The respondent authority maintained that the refusal was justified based on the technical assessment of the application and prior art references.
Reasoning and Analysis
The Court held that patent examination is an interactive and iterative process, requiring transparency and communication of objections at each stage. It found that several technical objections particularly concerning claim terminology and scope were introduced for the first time in the final refusal order, without prior notice to the applicant. The Court emphasised that such a course violates the rule of audi alteram partem, a fundamental principle of natural justice, as it deprives the applicant of an opportunity to address the grounds of refusal.
On the issue of inventive step, the Court noted that the Controller failed to undertake a proper reasoned analysis. It observed that merely stating that a combination of prior art is possible is insufficient; the authority must demonstrate why a person skilled in the art would be motivated to combine such teachings to arrive at the claimed invention.
The Court found that the prescribed analytical framework for assessing inventive step was not followed and that the conclusions lacked technical reasoning. It held that the impugned order reflected procedural infirmity and non-application of mind.
Decision
The Delhi High Court set aside the patent refusal order and remanded the matter for fresh consideration. It directed the Patent Office to issue a comprehensive hearing notice clearly outlining all objections and to complete the proceedings expeditiously, preferably within four months.