Patent No. EP3248032 (titled "Near Infrared Optical Interference Filters With Improved Transmission") was filed by Materion on Jan 22, 2016. The application was issued on Nov 25, 2020.

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 |
|---|---|---|
| VIAVI SOLUTIONS | Aug 25, 2021 | MURGITROYD |
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.
Date
Description
Get instant alerts for new documents
Dec 23, 2025
Dec 23, 2025
Dec 23, 2025
Dec 19, 2025
Dec 17, 2025
Nov 21, 2025
Nov 21, 2025
Nov 21, 2025
Oct 29, 2025
Oct 29, 2025
Oct 29, 2025
Oct 29, 2025
Oct 29, 2025
Oct 20, 2025
Oct 17, 2025
Oct 17, 2025
Sep 26, 2025
Sep 24, 2025
Sep 24, 2025
Sep 24, 2025
Sep 22, 2025
Sep 22, 2025
Sep 22, 2025
Sep 19, 2025
Sep 19, 2025
Sep 19, 2025
Sep 18, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Sep 15, 2025
Jan 28, 2025
Jan 28, 2025
Jan 23, 2025
Jan 23, 2025
Nov 15, 2024
Sep 20, 2024
Sep 18, 2024
Sep 18, 2024
Sep 18, 2024
Sep 18, 2024
Sep 18, 2024
Sep 4, 2024
Apr 4, 2024
Mar 28, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 27, 2024
Mar 22, 2024
Mar 22, 2024
Mar 22, 2024
Nov 30, 2023
Nov 28, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Sep 18, 2023
Sep 18, 2023
Sep 14, 2023
Sep 14, 2023
Sep 12, 2023
Sep 12, 2023
Sep 12, 2023
Sep 8, 2023
Sep 8, 2023
Sep 8, 2023
Jul 25, 2023
Jul 25, 2023
Jul 25, 2023
Jul 21, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 12, 2023
Jul 10, 2023
May 24, 2023
May 23, 2023
May 19, 2023
May 17, 2023
May 17, 2023
May 17, 2023
May 17, 2023
Mar 31, 2023
Mar 28, 2023
Mar 23, 2023
Mar 23, 2023
Mar 23, 2023
Mar 23, 2023
Mar 23, 2023
Mar 23, 2023
Mar 23, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Mar 22, 2023
Dec 2, 2022
Dec 2, 2022
Oct 24, 2022
Oct 19, 2022
Oct 19, 2022
Oct 19, 2022
Oct 14, 2022
Oct 14, 2022
Oct 14, 2022
Sep 30, 2022
Sep 27, 2022
Sep 27, 2022
Sep 27, 2022
Sep 27, 2022
Sep 19, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Sep 15, 2022
Mar 14, 2022
Mar 7, 2022
Mar 7, 2022
Mar 7, 2022
Mar 7, 2022
Feb 1, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 25, 2022
Jan 11, 2022
Dec 28, 2021
Dec 28, 2021
Dec 28, 2021
Sep 15, 2021
Sep 15, 2021
Sep 6, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Aug 25, 2021
Dec 7, 2020
Oct 29, 2020
Oct 20, 2020
Oct 20, 2020
Oct 20, 2020
Oct 20, 2020
Oct 20, 2020
Jul 22, 2020
Jul 22, 2020
Jul 22, 2020
Jul 22, 2020
Jul 22, 2020
Jun 24, 2020
Jun 19, 2020
Jun 19, 2020
Jun 19, 2020
Jun 10, 2020
Jun 10, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Jun 2, 2020
Feb 12, 2020
Feb 3, 2020
Feb 3, 2020
Feb 3, 2020
Oct 28, 2019
Oct 28, 2019
Oct 28, 2019
Oct 28, 2019
Oct 28, 2019
Sep 4, 2019
Sep 4, 2019
Jun 13, 2019
Jun 13, 2019
Jun 13, 2019
Jun 13, 2019
Jun 13, 2019
Feb 8, 2019
Feb 8, 2019
Jun 27, 2018
May 22, 2018
Mar 23, 2018
Mar 23, 2018
Mar 15, 2018
Mar 15, 2018
Mar 15, 2018
Mar 13, 2018
Mar 13, 2018
Mar 6, 2018
Mar 6, 2018
Mar 6, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Feb 15, 2018
Nov 3, 2017
Sep 8, 2017
Aug 28, 2017
Aug 11, 2017
Aug 11, 2017
Aug 8, 2017
Jun 2, 2017
Aug 15, 2016
Jul 28, 2016
Jul 28, 2016
Apr 7, 2016
Apr 5, 2016
Apr 5, 2016
Apr 5, 2016
Mar 7, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016
Feb 8, 2016