Calix Limited v Grenof Pty Ltd [2023] FCA 378

Calix Limited v Grenof Pty Ltd [2023] FCA 378

Claim 1 of Australian Patent No 2014339743 was not infringed because the Grenof process involved reaching or exceeding the boiling point, thus falling outside the scope of claim 1, which is limited to 'near the boiling point.' Additionally, claim 1 was invalid for lack of inventive step as it reflected well-known techniques in the production of hydroxide slurries requiring only routine steps, and was invalid for non-compliance with s 40(3) due to lack of support in the specification. The letter sent by Calix constituted an unjustified threat.

Parties
Applicant: Calix Limited; First Respondent / Cross Claimant: Grenof Pty Ltd; Second Respondent: Aquadex Pty Ltd; Cross Respondent: Calix Limited
Jurisdiction
Australia
Judgment Date
28 April 2023
Procedural Posture
Originating Application and Cross Claim / Judgment After Final Hearing
Outcome
Application dismissed; claim 1 revoked; unjustified threat declared; costs orders made
Legal Topics
Patents, Patent Infringement, Patent Validity, Inventive Step, Novelty, Lack of Support, Burden of Proof
Intellectual Property Patents Patent Infringement Patent Validity Inventive Step Novelty Lack of Support Burden of Proof

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Parties

Calix Limited

Applicant

Grenof Pty Ltd

First Respondent / Cross Claimant

Aquadex Pty Ltd

Second Respondent

Calix Limited

Cross Respondent

Procedural Posture

Originating Application and Cross Claim / Judgment After Final Hearing

Legal Issues

  1. 1 Whether claim 1 of Australian Patent No 2014339743 was infringed
  2. 2 Whether claim 1 is invalid for lack of inventive step
  3. 3 Whether claim 1 is invalid for lack of novelty

Ratio Decidendi

Claim 1 of Australian Patent No 2014339743 was not infringed because the Grenof process involved reaching or exceeding the boiling point, thus falling outside the scope of claim 1, which is limited to 'near the boiling point.' Additionally, claim 1 was invalid for lack of inventive step as it reflected well-known techniques in the production of hydroxide slurries requiring only routine steps, and was invalid for non-compliance with s 40(3) due to lack of support in the specification. The letter sent by Calix constituted an unjustified threat.

Court Disposition

Application dismissed; claim 1 revoked; unjustified threat declared; costs orders made

Orders

  • The amended originating application filed on 2 March 2023 be dismissed.
  • Claim 1 of Australian Patent No 2014339743 be revoked.