The plaintiff, Evangelos Stamatopoulos, appeals from the judgment of the trial court, rendered after a bench trial, in favor of the defendant, ECS North America, LLC, on both of the plaintiff's claims for conversion and replevin. He claims that the court erroneously concluded that the defendant was a good faith purchaser of the subject property for value under the Uniform Commercial Code, General Statutes § 42a-1-101 et seq. We conclude, however, that this claim is moot because there is an independent, unchallenged ground upon which we may affirm the court's judgment for the defendant on both counts of the complaint. Accordingly, we dismiss this appeal for lack of subject matter jurisdiction.

Because we resolve this appeal on jurisdictional grounds, we set forth only the facts and procedural history germane to our discussion of that issue. In its July 10, 2015 memorandum of decision, the court found the following facts. As of 2009, a group of Ohio businesses 1 were titleholders to a Tag-A-Long, a piece of heavy machinery used for removing paint from bridges. On December 21, 2009, the Ohio businesses executed an assignment of title for the Tag-A-Long in favor of Erie Painting and Maintenance, Inc. (Erie). Approximately six months later, on June 7, 2010, the Ohio businesses filed for bankruptcy. The plaintiff, interested in purchasing the Ohio businesses' assets, contacted their principal creditor and reviewed that creditor's inventories of their assets, one of which listed the Tag-A-Long as an asset.

On June 13, 2011, the plaintiff purchased the Ohio businesses' assets for $270,000 pursuant to an asset purchase agreement (agreement). Article I of the agreement, however, entitled "Assets, Rights, and Liabilities," contained an important caveat with respect to the equipment covered by the agreement. It provided that, although the plaintiff "shall purchase and acquire ... all of the assets used by [the Ohio businesses] in connection with the [b]usiness," the plaintiff "acknowledges that certain assets in these exhibits may be duplicative and the lists are not exhaustive of every piece of equipment owned or possessed by [the Ohio businesses], and that certain pieces of equipment ... may have been disposed of prior to its bankruptcy filings but are intended to be representative of [the Ohio businesses'] good faith attempt to list all its holdings being transferred hereunder as 'all equipment.' " (Emphasis added.)

On May 23, 2012, approximately two and one-half years after it was assigned title to the Tag-A-Long, Erie sold the Tag-A-Long to the defendant for $100,000. After learning of the defendant's claim to the Tag-A-Long, the plaintiff commenced this action against the defendant in January, 2014, alleging causes of action for conversion and replevin. Forming the basis for both of the plaintiff's claims was his allegation that he owned the Tag-A-Long because it was among the assets he purchased from the Ohio businesses pursuant to the 2011 agreement. 2 On July 10, 2015, following a bench trial, the court found for the defendant on both counts of the complaint. The court's decision was based upon two principal findings. First, the court emphasized that, to prevail on either his conversion or replevin claim, the plaintiff had to "[prove] his claim to ownership of the Tag-A-Long by a preponderance of the evidence ...." The court observed that the agreement upon which the plaintiff's claim to ownership was based "does not purport to sell all of the assets set forth in the schedules attached to it. It only conveys to the plaintiff those assets still owned by the [Ohio businesses] as of the date of the bankruptcy filing." Implicitly relying on the 2009 assignment of the Tag-A-Long to Erie, the court found that "the plaintiff has not proven that the Tag-A-Long was owned by the [Ohio businesses] at the time of the filing of bankruptcy in 2010." Moreover, the court found that the plaintiff "has not established his right to ownership" under Ohio law. The court's second principal finding was that the defendant proved, by a preponderance of the evidence, that it was a good faith purchaser for value under the Uniform Commercial Code. On the basis of that finding, the court concluded that "[a]ny claims the plaintiff may have had to the Tag-A-Long as against third parties are extinguished and do not survive or justify a claim of ownership against [the defendant's] superior title claim." Accordingly, the court rendered judgment for the defendant on both counts of the complaint, and this appeal ensued.

In his main brief, the plaintiff does not challenge the court's finding that he failed to prove an ownership interest in the Tag-A-Long; he claims only that the court erred in finding that the defendant was a good faith purchaser for value. 3 Conversion and replevin, however, both require proof of an ownership or property interest in the subject property. See Sullivan v. Thorndike , 104 Conn.App. 297 , 308, 934 A.2d 827 (2007) ("[a]n essential element of ... conversion is the requirement that the party asserting such a claim have either a legal right or possessory interest in the property at issue"), cert. denied, 285 Conn. 907 , 908, 942 A.2d 415 (2008) ; Cornelio v. Stamford Hospital , 246 Conn. 45 , 49, 717 A.2d 140 (1998) (prima facie claim for replevin pursuant to General Statutes § 52-515 requires proof, inter alia, that the plaintiff "has a property interest in the [property]" [internal quotation marks omitted] ). Thus, the court's unchallenged finding that the plaintiff failed to prove an ownership interest in the Tag-A-Long is wholly dispositive of the plaintiff's claims regardless of whether the defendant was a good faith purchaser for value. 4

"Mootness is a question of justiciability that must be determined as a threshold matter because it implicates [a] court's subject matter jurisdiction .... In determining mootness, the dispositive question is whether a successful appeal would benefit the plaintiff or defendant in any way." (Citation omitted; internal quotation marks omitted.) Horenian v. Washington , 128 Conn.App. 91 , 97-98, 15 A.3d 1194 (2011). It follows that "[w]here alternative grounds found by the reviewing court and unchallenged on appeal would support the trial court's judgment, independent of some challenged ground, the challenged ground that forms the basis of the appeal is moot because the court on appeal could grant no practical relief to the complainant." (Internal quotation marks omitted.) Id., at 99, 15 A.3d 1194 . In the present case, there is an independent, unchallenged basis for the court's judgment for the defendant on both counts of the complaint, namely, that he failed to prove that he owned the Tag-A-Long to warrant a judgment of replevin or conversion. Therefore, we cannot afford the plaintiff any practical relief with respect to his remaining claim. Accordingly, the plaintiff's claim is moot and, there being no other claims of error properly before us, 5 we dismiss his appeal for lack of subject matter jurisdiction.

The appeal is dismissed.