Patent No. EP1961488 (titled "Apparatus For Spraying Liquids, And Disposable Containers And Liners Suitable For Use Therewith") was filed by 3M on Jan 14, 1998. The application was issued on Feb 24, 2021.

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 |
|---|---|---|
| SAINT GOBAIN | Oct 21, 2016 | ZIMMERMANN & PARTNER PATENTANWALTE MBB |
| SAINT-GOBAIN ABRASIVES, INC. | Mar 18, 2015 | ZIMMERMANN & PARTNER PATENTANWALTE MBB |
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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