Federal Court of Appeal decision clarifies effects of partial waiver of privilege
On January 30, 2009, the Federal Court of Appeal (FCA) clarified the circumstances under which a partial waiver of privileged material can result in an implied complete waiver of privilege. The FCA's decision in Merck & Co. Inc. et al. v. Apotex Inc. et al. (2009 FCA 27) was an interlocutory decision in a patent infringement case.
The issue arose in the context of examination for discovery in respect of the patent dispute, which relates to the manufacture of a drug called lovastatin. This drug is produced by certain micro-organisms, and the production of lovastatin from the Aspergillus terreus micro-organism is covered by a Canadian patent owned by the plaintiff, Merck & Co. Inc. (Merck). Merck had apparently carried out some tests, for the purpose of the litigation, to improve its understanding of the process used by the defendants. As the tests were conducted for the purpose of the litigation, information about the tests qualified for protection under the litigation privilege. The purpose of the litigation privilege is to create a zone of privacy in relation to pending or apprehended litigation, to facilitate investigation and preparation of a case for trial by the adversarial advocate.
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