Water Renovation (Pty) Ltd v Gold Fields of SA Ltd (481/91) [1993] ZASCA 169; 1994 (2) SA 588 (AD); [1994] 2 All SA 33 (A) (12 November 1993)

Water Renovation (Pty) Ltd v Gold Fields of SA Ltd (481/91) [1993] ZASCA 169; 1994 (2) SA 588 (AD); [1994] 2 All SA 33 (A) (12 November 1993)

The Supreme Court of Appeal held that the proposed amendment to the patent specification, specifically the introduction of insert A into claim 21 and its dependent claims, did not serve to distinguish the claims from the prior art disclosed in the Pulles paper. The court found that insert A was not an essential integer of the invention as described in the specification, and its inclusion was a stratagem rather than a substantive limitation. The patentee was bound by its admissions that claims 21 to 25 were only entitled to the priority date of the complete specification, making them anticipated by the Pulles paper and thus invalid for lack of novelty. The court further held that the...

Citation
[1993] ZASCA 169
Parties
Appellant: Water Renovation (Pty) Ltd; Respondent: Gold Fields of SA Ltd
Court
Supreme Court of Appeal
Jurisdiction
South Africa
Judgment Date
12 November 1993
Case Number
481/91
Procedural Posture
Civil Appeal / Appeal From Commissioner of Patents Refusing Amendment of Patent Specification
Outcome
Appeal dismissed with costs, including costs consequent upon employment of two counsel.
Judges
Harms, Botha, E M Grosskopf, Milne, Nicholas
Legal Topics
Patent Amendment, Priority Date, Novelty, Anticipation, Co Inventorship, Fair Basis
Intellectual Property Patent Amendment Priority Date Novelty Anticipation Co Inventorship Fair Basis

Case Brief

Summary, issues, holding and outcome

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Parties

Water Renovation (Pty) Ltd

Appellant

Gold Fields of SA Ltd

Respondent

Procedural Posture

Civil Appeal / Appeal From Commissioner of Patents Refusing Amendment of Patent Specification

Legal Issues

  1. 1 Whether the proposed amendment to the patent specification should be granted.
  2. 2 Whether the amendment would distinguish the patent claims from prior art disclosed in the Pulles paper.
  3. 3 Whether the patentee is bound by admissions regarding the priority date of certain claims.

Ratio Decidendi

The Supreme Court of Appeal held that the proposed amendment to the patent specification, specifically the introduction of insert A into claim 21 and its dependent claims, did not serve to distinguish the claims from the prior art disclosed in the Pulles paper. The court found that insert A was not an essential integer of the invention as described in the specification, and its inclusion was a stratagem rather than a substantive limitation. The patentee was bound by its admissions that claims 21 to 25 were only entitled to the priority date of the complete specification, making them anticipated by the Pulles paper and thus invalid for lack of novelty. The court further held that the...

Court Disposition

Appeal dismissed with costs, including costs consequent upon employment of two counsel.

Orders

  • The appeal is dismissed with costs, including the costs consequent upon the employment of two counsel.
  • The application for amendment of the patent specification is refused.