Smith International Inc v Specialised Petroleum Services Group Ltd

Smith International Inc v Specialised Petroleum Services Group Ltd

The prior art (D6) does not disclose a filter as required by claim 1, nor does it provide a diversion means for bypassing the filter in one direction and forcing fluid through it in the other. The invention is novel and not anticipated. The modification suggested by Smith is not obvious to the notional skilled person. Subsidiary claims stand or fall with claim 1; objections to claims 8, 13, 14, 15, 17, and 23 fail. Claim 17 is clear and does not disclose added matter. Claim 23 is not anticipated by D6 as it does not disclose a method of cleaning while running the tool.

Parties
Claimant: Smith International, Inc.; Defendant: Specialised Petroleum Services Group Ltd
Jurisdiction
England and Wales
Judgment Date
21 April 2005
Procedural Posture
Patent Appeal / Appeal and Cross Appeal From Comptroller's Decision
Outcome
Appeal allowed; cross-appeal dismissed.
Legal Topics
Patent Validity, Novelty, Obviousness, Claim Construction, Added Matter, Method Claims
Intellectual Property Patent Law Patent Validity Novelty Obviousness Claim Construction Added Matter Method Claims

Case Brief

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Parties

Smith International, Inc.

Claimant

Specialised Petroleum Services Group Ltd

Defendant

Procedural Posture

Patent Appeal / Appeal and Cross Appeal From Comptroller's Decision

Legal Issues

  1. 1 Whether claim 1 of the patent is novel and not anticipated by prior art
  2. 2 Whether claim 1 is obvious in light of prior art
  3. 3 Construction of 'filter' and 'diversion means' in claim 1

Ratio Decidendi

The prior art (D6) does not disclose a filter as required by claim 1, nor does it provide a diversion means for bypassing the filter in one direction and forcing fluid through it in the other. The invention is novel and not anticipated. The modification suggested by Smith is not obvious to the notional skilled person. Subsidiary claims stand or fall with claim 1; objections to claims 8, 13, 14, 15, 17, and 23 fail. Claim 17 is clear and does not disclose added matter. Claim 23 is not anticipated by D6 as it does not disclose a method of cleaning while running the tool.

Court Disposition

Appeal allowed; cross-appeal dismissed.

Orders

  • SPS' appeal on claim 1 allowed; Mr Hayward's decision set aside.
  • Smith's cross-appeal on claims 8, 13, 14, 15, 17, and 23 dismissed.