Ebara Corporation v. Semigroup Texas, LLC et al
| Filed | 2026-08-04 |
|---|---|
| Court | N.D. Tex. |
| Docket | 3:26-cv-02585 |
| Nature of suit | 830 Patent |
| Practice area | Patent |
| Plaintiff | Ebara Corporation |
| Defendant | Semigroup Texas, LLC et al |
| Complaint | Download the complaint (PDF, free) |
What the complaint alleges
Ebara Corporation sued Semigroup Texas, LLC, Warde Technology Materials, LLC, and Warde Tec (Taiwan) Co., Ltd. in the U.S. District Court for the Northern District of Texas, alleging infringement of U.S. Patent No. 9,573,244 and five design patents. The complaint alleges that Defendants made, used, sold, offered for sale, and imported CMP components, including elastic membranes and retaining rings, marketed as 'drop-in replacements' for Ebara products, without authorization.
Claims asserted
- Infringement of U.S. Patent No. 9,573,244 under 35 U.S.C. § 271(a) and § 271(b)