U.S. International Trade Commission Opens Investigation into Imported Processed Slabs
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On January 27, 2026, the U.S. International Trade Commission (USITC) published a notice of a new investigation. The investigation is numbered 337-TA-1482. It concerns “certain processed slabs and methods for making same.”
The complaint was filed by Cambria Company LLC. Cambria is located in Belle Plaine, Minnesota. The company filed its initial complaint on December 19, 2025. A supplement to the complaint was filed on January 5, 2026.
The complaint alleges violations of Section 337 of the Tariff Act of 1930. The violations concern the importation, sale for importation, and the sale after importation of certain products. These products include veined processed slabs made with quartz, glass, or minerals.
The complaint claims that these products infringe on patents owned by Cambria. The listed patents are:
- U.S. Patent No. 10,195,762 (claims 22–25)
- U.S. Patent No. 10,252,440 (claims 14–20)
- U.S. Patent No. 12,370,718 (claims 1–2 and 4–16)
Cambria also claims that an industry exists in the United States. This is a required element under Section 337 for the investigation to proceed.
Based on the complaint, the USITC has ordered that an investigation be started. The investigation will determine if a violation of Section 337 has occurred.
The investigation will also decide if an industry in the U.S. exists as required by law.
The products under investigation are plainly described as “veined processed slabs produced with quartz, glass, or minerals.”
Cambria Company LLC is named as the complainant. The parties accused of importing or selling the infringing products include the following:
- Surface Warehouse, L.P. d/b/a US Surfaces and Vadara Quartz Surfaces, Austin, Texas
- M S International Inc. d/b/a MSI, Orange, California
- Arizona Tile, LLC, Tempe, Arizona
- OHM International Inc., Monroe Township, New Jersey
- Architectural Surfaces Group LLC, Spicewood, Texas
- Caesarstone Ltd., Kibbutz Sdot-Yam, Israel
- Caesarstone USA, Inc., Charlotte, North Carolina
- LX Hausys, Ltd., Seoul, Republic of Korea
- LX Hausys America, Inc., Alpharetta, Georgia
- Mohawk Industries, Inc., Calhoun, Georgia
- Dal-Tile, LLC, Dallas, Texas
The Office of Unfair Import Investigations will also participate in the case.
The Chief Administrative Law Judge of the USITC will assign a judge to preside over the investigation.
Each respondent must reply to the complaint and notice of investigation within 20 days of service. Responses must follow USITC rules under 19 CFR 210.13.
No extensions will be granted unless good cause is shown.
If a respondent does not reply on time, they may lose the right to object to the claims. If that happens, the judge can accept the facts in the complaint as true and issue an exclusion order or cease and desist order.
The complaint and non-confidential documents can be found online at: https://edis.usitc.gov.
General information on the USITC is at: https://www.usitc.gov.
Issued by order of the USITC on January 23, 2026.
Signed,
Lisa Barton
Secretary to the Commission
Federal Register Document Number: 2026-01612
Filed: January 26, 2026
Billing Code: 7020-02-P
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