Sudarshan Chemical Industries Ltd v Clariant Produkte (Deutschland) GmbH [2013] EWCA Civ 919 (30 July 2013)

Sudarshan Chemical Industries Ltd v Clariant Produkte (Deutschland) GmbH [2013] EWCA Civ 919 (30 July 2013)

The Court of Appeal held that the judge was correct to find that the relevant claims of the 338 patent were invalid for obviousness over the prior art, that the proposed amendments and disclaimer were not allowable as they either added matter or were unclear, and that the threat letter was actionable and not justified. The appeal was dismissed.

Citation
[2013] EWCA Civ 919
Parties
Claimant/respondent: Sudarshan Chemical Industries Ltd; Defendant/appellant: Clariant Produkte (Deutschland) GmbH
Jurisdiction
England and Wales
Judgment Date
30 July 2013
Procedural Posture
Patent Revocation and Infringement Appeal / Appeal From High Court (patents Court) to Court of Appeal
Outcome
Appeal dismissed; judgment for Sudarshan Chemical Industries Ltd
Legal Topics
Patent Validity, Obviousness, Added Matter, Patent Infringement, Unjustified Threats, Amendment of Patent Claims
Intellectual Property Law Patent Law Patent Validity Obviousness Added Matter Patent Infringement Unjustified Threats Amendment of Patent Claims

Case Brief

Summary, issues, holding and outcome

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Parties

Sudarshan Chemical Industries Ltd

Claimant/respondent

Clariant Produkte (Deutschland) GmbH

Defendant/appellant

Procedural Posture

Patent Revocation and Infringement Appeal / Appeal From High Court (patents Court) to Court of Appeal

Legal Issues

  1. 1 Whether claims 6-8 of EP 1 170 338 are invalid for lack of novelty and/or obviousness over prior art (US 5,047,517)
  2. 2 Whether proposed amendments (claims 6-13, disclaimer) introduce added matter or are otherwise allowable
  3. 3 Whether the letter of 25 November 2009 constituted an actionable threat under s.70 Patents Act 1977

Ratio Decidendi

The Court of Appeal held that the judge was correct to find that the relevant claims of the 338 patent were invalid for obviousness over the prior art, that the proposed amendments and disclaimer were not allowable as they either added matter or were unclear, and that the threat letter was actionable and not justified. The appeal was dismissed.

Court Disposition

Appeal dismissed; judgment for Sudarshan Chemical Industries Ltd

Orders

  • Claims 6-8 of EP 1 170 338 declared invalid for obviousness
  • Proposed amendments and disclaimer refused