Patent No. EP2772172 (titled "Holding Plate And Method For Producing A Holding Plate") was filed by Wolf PVG on Feb 12, 2014. The application was issued on Apr 17, 2019.
A vacuum cleaner bag holding plate with a pivotable closure element that can be produced with a minimal number of components and steps. The holding plate features a base plate with an inflow opening and a closure element formed integrally with the base plate. The closure element is folded over the opening and biased to a closed position by a spring. The holding plate also includes a holding portion connected to the base plate via a film hinge, which can be folded together with the closure element.

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 |
|---|---|---|
| EUROFILTERS HOLDING | Jan 17, 2020 | GRUNECKER PATENT |
| ELKU BAUTEILE | Jan 13, 2020 | SZAUNIG |
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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