Patent No. EP3783068 (titled "Granular Conductive Carbon Black And Preparation Method Thereof") was filed by Jiaozuo City Hexing Chemical Industry on Jun 26, 2020. The application was issued on Nov 16, 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 |
|---|---|---|
| ORION ENGINEERED CARBONS | Aug 15, 2023 | F & E PATENT |
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
Jan 19, 2026
Jan 19, 2026
Jan 19, 2026
Jan 14, 2026
Jan 13, 2026
Jan 13, 2026
Jan 13, 2026
Jan 8, 2026
Jan 8, 2026
Jan 8, 2026
Jan 8, 2026
Dec 4, 2025
Dec 4, 2025
Nov 27, 2025
Nov 27, 2025
Nov 27, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Oct 1, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jul 29, 2025
Jun 24, 2025
Jun 13, 2025
Jun 12, 2025
Jun 12, 2025
Jun 12, 2025
May 20, 2025
May 20, 2025
May 20, 2025
Apr 30, 2025
Apr 29, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 24, 2025
Apr 17, 2025
Apr 17, 2025
Apr 17, 2025
Dec 2, 2024
Dec 2, 2024
Dec 2, 2024
Dec 2, 2024
Dec 2, 2024
Feb 23, 2024
Feb 19, 2024
Feb 19, 2024
Feb 19, 2024
Dec 18, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Dec 12, 2023
Aug 28, 2023
Aug 28, 2023
Aug 23, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 16, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Aug 15, 2023
Nov 29, 2022
Oct 20, 2022
Oct 11, 2022
Oct 11, 2022
Oct 11, 2022
Oct 11, 2022
Oct 11, 2022
Jun 14, 2022
Jun 14, 2022
Jun 14, 2022
Jun 14, 2022
Jun 14, 2022
Jan 4, 2022
Jan 4, 2022
Jan 4, 2022
Jan 4, 2022
Jan 4, 2022
Jan 4, 2022
Jan 4, 2022
Sep 9, 2021
Sep 9, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Jun 1, 2021
Mar 1, 2021
Feb 3, 2021
Feb 3, 2021
Jan 27, 2021
Nov 27, 2020
Nov 27, 2020
Nov 27, 2020
Nov 16, 2020
Aug 19, 2020
Aug 19, 2020
Aug 19, 2020
Jul 20, 2020
Jul 9, 2020
Jul 2, 2020
Jul 2, 2020
Jul 2, 2020
Jun 30, 2020
Jun 26, 2020
Jun 26, 2020
Jun 26, 2020
Jun 26, 2020
Jun 26, 2020
Jun 26, 2020
Jun 26, 2020