Harmonized Tariff Schedule of the United States

In a customs classification case, Chemtall, Inc. v. United States, the U.S. Court of Appeals for the Federal Circuit affirmed a U.S. Court of International Trade (“CIT”) ruling that the vinyl polymer acrylamide tertiary butyl sulfonic acid was properly classified under the Harmonized Tariff Schedule of the United States (“HTSUS”).

The Federal Circuit was

In a recent opinion, the Court of International Trade upheld the determination by U.S. Customs and Border Protection (CBP) that certain doorknobs imported by home-improvement retailer Home Depot are properly classified as locks and subject to a higher duty than other doorknobs.

In essence, the dispute came down to a question of whether a doorknob