Patent No. EP3629995 (titled "Dual Shell Dental Appliance And Material Constructions") was filed by BAY Materials on May 31, 2018. The application was issued on Oct 26, 2022.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| SCHEU DENTAL | Jul 25, 2023 | SCHNEIDERS & BEHRENDT BOCHUM |
| SHANGHAI MAXFLEX MEDICAL TECHNOLOGY | Jul 24, 2023 | DOMPATENT VON KREISLER SELTING WERNER |
| SHANGHAI MAXFLEX MEDICAL TECHNOLOGY | Jul 24, 2023 | DOMPATENT VON PATENT UND RECHTSANWALTEN |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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