Executive Summary: Key Legal and Evidentiary Issues

• The appeal challenged an order allowing amendment of pleadings to add individual defendants in a patent infringement case involving laminate flooring

• Appellants argued the Federal Court applied an overly deferential standard of review to the Associate Judge's decision as Case Management Judge

• Sufficiency of material facts pled to pierce the corporate veil and hold individual directors personally liable was contested

• Whether two conflicting lines of jurisprudence exist in applying the Mentmore test for personal liability was raised

• Adequacy of reasons provided by both the Associate Judge and the Federal Court was challenged

• The correct standard of review—palpable and overriding error for factually-suffused decisions—was confirmed as the applicable test

Background and parties involved

This case involves a patent infringement dispute concerning laminate flooring products. The respondents, Unilin Beheer B.V. and Flooring Industries Limited, SARL, initiated the underlying action against three corporate defendants: 6035558 Canada Inc. (also known as Mississauga Flooring Solutions Inc.), 2364651 Ontario Inc. (also known as Epico Forest Products Inc.), and 2184372 Ontario Inc. (doing business as Hardwood Giant). Following examinations on discovery of the corporate appellants, the respondents sought to amend their statement of claim to add three individual defendants—Manmoham Grewal, Rajvir Grewal, and Ravnit Kauldhar—each of whom is a sole director of one of the three corporate appellants.

The procedural history

The Associate Judge, acting in her capacity as Case Management Judge, granted the respondents leave to serve and file a second amended statement of claim pursuant to Rule 75 of the Federal Courts Rules on June 19, 2024. The Associate Judge was satisfied that sufficient material facts had been pled to sustain the claim of patent infringement against the proposed individual defendants and highlighted that the action remained at an early stage. The appellants then appealed to a judge of the Federal Court under Rule 51, arguing that the Associate Judge committed at least four reviewable errors. The Federal Court (per Gagné J.) addressed each of the alleged errors and dismissed the motion to appeal on March 25, 2025 (2025 FC 552).

The standard of review dispute

The appellants' first argument on appeal was that the Federal Court applied an overly deferential standard of review because the Associate Judge was acting as the Case Management Judge. The Federal Court of Appeal disagreed, finding that the Federal Court properly identified the correct legal test as established in Hospira Healthcare Corporation v. Kennedy Institute of Rheumatology, 2016 FCA 215. The appellate standard requires intervention only if the Federal Court's refusal to interfere with the Associate Judge's order was premised on an error of law or a palpable and overriding error of fact or mixed fact and law. The Court noted that a palpable error is one that is obvious, whereas an overriding error is one that must go to the very core of the outcome of the case.

Clarification on case management deference

The Court addressed the appellants' concern regarding the Federal Court's statement about interfering only in "the clearest case of misuse of judicial discretion" for decisions made by a case management judge. While acknowledging this language from older jurisprudence such as L'Hirondelle v. Canada, 2001 FCA 338 and Constant v. Canada, 2012 FCA 87 can lend itself to confusion, the Court explained these expressions are merely expressions of the deference owed to such a judge or associate judge in factually-suffused decisions, absent a reviewable error. The Court stated it is best to stick to the language of the test as set out in Hospira but found the Federal Court used the additional language as an expression of, or a euphemism for, the highly deferential standard of palpable and overriding error.

The corporate veil and pleading sufficiency

The appellants' second argument contended that the Federal Court and the Associate Judge ought to have found that there were insufficient particularized pleadings or material facts necessary to pierce the corporate veil, stating that the individual defendants were painted with the same brush and conflated with the corporate defendants using expansive definitions. They argued two lines of jurisprudence applying Mentmore Manufacturing Co., Ltd. et al. v. National Merchandising Manufacturing Co. Inc., 1978 CanLII 2037 (FCA), 40 CPR (2d) 164 exist—one being unduly permissive and the other being restrictive—and that the Associate Judge and the Federal Court failed to apply what they submit is the proper interpretation. The Federal Court of Appeal declined the appellants' request to rectify what they consider to be two lines of jurisprudence, agreeing with the respondents' written submissions that there is no such schism in the jurisprudence that requires intervention. Considering the contents of the Amended Claim, the Court found no basis upon which to intervene with the Federal Court's conclusion that there was no palpable and overriding error in the Associate Judge's finding that the pleadings disclose sufficient material facts to support the inclusion of the individual appellants as named parties in the proceedings.

Sufficiency of reasons

The appellants' final argument contended that neither the Federal Court nor the Associate Judge provided sufficient reasons in their respective decisions. After carefully considering both sets of reasons, the Federal Court of Appeal found no such error in the Federal Court's conclusion that the Associate Judge's reasons were sufficient given the applicable law and the record before her.

The ruling and outcome

The Federal Court of Appeal dismissed the appeal with costs. The respondents, Unilin Beheer B.V. and Flooring Industries Limited, SARL, were successful in maintaining the Associate Judge's order permitting them to proceed with their amended statement of claim against both the corporate and individual defendants. No specific monetary amount was determined in this ruling, as the decision addressed only whether the amendment to add individual defendants should be permitted; the substantive patent infringement claims remain to be adjudicated in the underlying action.