Patent No. EP1835861 (titled "Method And Apparatus For Patterned Plasma-Mediated Laser Trephination Of The Lens Capsule And Three Dimensional Phaco-Segmentation") was filed by AMO on Jan 10, 2006. The application was issued on Sep 22, 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 |
|---|---|---|
| ALCON | Sep 21, 2020 | BREUER FRIEDRICH HAHNER PATENTANWALTE PARTG MBB |
| ALCON PHARMA | Sep 21, 2020 | BREUER FRIEDRICH HAHNER PATENTANWALTE PARTG MBB |
| CARL ZEISS MEDITEC AG | Jan 13, 2017 | PATENTANWALTE GEYER |
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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