The same week that New York-based IP boutique Kenyon & Kenyon announced that it would close its doors as its remaining lawyers prepared to join Andrews Kurth, a former patent prosecution client has sued the dissolving firm for malpractice.

Portus, a Singapore-based company that makes so-called “smart-home” technology such as video surveillance equipment, filed suit Wednesday against Kenyon & Kenyon in a federal court in New York, claiming the firm’s negligence resulted in the loss of three years from a patent term. Former Kenyon & Kenyon partner Jeffrey Ginsberg and ex-counsel Aaron Grunberger, who left the firm within the past year for Patterson Belknap Webb & Tyler and Norton Rose Fulbright, respectively, are also named as defendants in the case.