SUPREME COURT CONFIRMS THAT "USE" CLAIMS ARE PATENTABLE AND THAT THE DOCTRINE OF SOUND PREDICTION PERMITS PROTECTION OF EARLY STAGE INVENTIONS
Novopharm Ltd. and Apotex Inc. v. The Wellcome Foundation Limited, Glaxo Wellcome Inc. et al.
(Supreme Court of Canada, December 5, 2002)
Glaxo sued Novopharm and Apotex alleging infringement of a patent for a new use of AZT for prevention and treatment of the Human Immunodeficiency Virus (HIV) that causes Acquired Immune Deficiency Syndrome (AIDS). In its defence, Novopharm and Apotex argued that the patent was invalid on the basis of i) incorrect inventorship, ii) lack of novelty and inventiveness and iii) improper pharmaceutical "use" claims.
The Supreme Court, in a unanimous ruling, upheld the Federal Court of Appeal's decision, which found some use claims valid and infringed and other use claims overly broad and invalid. Key points of the decision include:
i) Methods of medical treatment are not permitted in Canada, however, use claims are permissible. Use claims do not fence in a method of medical treatment.
ii) Use claims will be invalid if there is a lack of utility in part of the claim or lack of a sound prediction. The doctrine of "sound prediction" allows a patentee to claim a new use of a known compound even before its utility has been fully verified by tests. Glaxo had sufficient information about AZT and its activity against HIV in human cells to make a sound prediction that AZT would be useful in the treatment and prophylaxis of HIV/AIDS in humans. To the extent that certain claims went beyond the limits of a sound prediction, they were invalid.
iii) Highly skilled scientists who merely verify an inventive concept (as opposed to participating in creating the inventive concept) are not inventors. In any event, omitting inventors would only void a patent if it was a "material" misstatement that was "willfully made for the purpose of misleading" which was not present in this case.
View Case
|