IP Verse

Silicon Nitride Powder And Production Method Therefor, And Production Method For Silicon Nitride Sintered Body - EP3950582

The patent EP3950582 was granted to Denka on Dec 13, 2023. The application was originally filed on Mar 26, 2020 under application number EP20783738A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

EP3950582

DENKA
Application Number
EP20783738A
Filing Date
Mar 26, 2020
Status
Granted And Under Opposition
Nov 10, 2023
Grant Date
Dec 13, 2023
External Links
Slate, Register, Google Patents

Patent Summary

Patent Family

Patent Family

Patent Oppositions

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.

CompanyOpposition DateRepresentativeOpposition Status

Get instant alerts for new oppositions and patent status changes

HOEGERSep 11, 2024-ADMISSIBLE

Patent Citations (13) New

Patent citations refer to prior patents cited during different phases such as opposition or international search.

Citation PhasePublication NumberPublication Link
DESCRIPTIONJP2011077546
DESCRIPTIONJPH07206409
INTERNATIONAL-SEARCH-REPORTJP2000302421
INTERNATIONAL-SEARCH-REPORTJPH01197307
INTERNATIONAL-SEARCH-REPORTJPH04114908
INTERNATIONAL-SEARCH-REPORTWO2013146713
OPPOSITIONDE4013923
OPPOSITIONEP2832687
OPPOSITIONJPH04114908
OPPOSITIONJPH0532405
OPPOSITIONJPH06329404
SEARCHEP3020686
SEARCHEP3156366

Non-Patent Literature (NPL) Citations (12) New

NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.

Citation PhaseReference TextLink
OPPOSITION- Anonymous, "ISO 17947:2014 Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods for chemical analysis of fine silicon nitride powders", ISO Norm, ISO International Standard, (20140901), pages 1 - 32, XP009557768-
OPPOSITION- Anonymous, "LECO TC-436 Nitrogen Oxygen Analyzer", Labx, (20241212), pages 1 - 3, XP093257154-
OPPOSITION- D18 - Experimental results-
OPPOSITION- Yoshioka Takayuki, Haruno Okochi, Ryosuke Hasegawa, "Determination of Ultra Low Contents of Oxygen in High Purity Iron", Materials Transactions, JIM, (19930101), vol. 34, no. 6, pages 504 - 510, XP093317170-
OPPOSITION- Sunderkötter J D, E. Grallath, H. Jenett , "Combined bulk and surface analysis of oxygen species in Si3N 4 powders by means of carrier-gas heat-extraction methods and Auger electron spectrometry", Fresenius' Journal of Analytical Chemistry, Springer, DE, DE , (19930101), vol. 346, no. 1-3, doi:10.1007/BF00321422, ISSN 0937-0633, pages 237 - 240, XP093216215
OPPOSITION- Peuckert et al., "Oxygen distribution in silicon nitride powders", Journal of Materials Science, (1987), vol. 22, doi:10.1007/BF01161483, XP001188503
OPPOSITION- Kaiser, G. ; Schubert, H., "The determination of oxygen in Si"3N"4 powder", Journal of the European Ceramic Society, ELSEVIER, AMSTERDAM, NL, AMSTERDAM, NL, (19930101), vol. 11, no. 3, doi:10.1016/0955-2219(93)90095-9, ISSN 0955-2219, pages 253 - 262, XP024175062
OPPOSITION- Kitayama Mikito, Hirao Kiyoshi, Tsuge Akira, Toriyama Motohiro, Kanzaki Shuzo, "Oxygen Content in ß‐Si3N4 Crystal Lattice", Journal of the American Ceramic Society, BLACKWELL PUBLISHING, MALDEN, MA., US, US , (19991101), vol. 82, no. 11, doi:10.1111/j.1151-2916.1999.tb02238.x, ISSN 0002-7820, pages 3263 - 3265, XP093317163
OPPOSITION- Kitayama Mikito, Hirao Kiyoshi, Tsuge Akira, Watari Koji, Toriyama Motohiro, Kanzaki Shuzo, "Thermal Conductivity of β‐Si 3 N 4 : II, Effect of Lattice Oxygen", Journal of the American Ceramic Society, BLACKWELL PUBLISHING, MALDEN, MA., US, US , (20000801), vol. 83, no. 8, doi:10.1111/j.1151-2916.2000.tb01501.x, ISSN 0002-7820, pages 1985 - 1992, XP093317164
OPPOSITION- Tanaka Satoru, Junji Okayama, Hiroshi Uchihara, Masahiko Ikeda, "Improvement of Precision in Oxygen and Nitrogen Analysis of Raw Ceramic Powders - Introduction of a Press Machine to Seal the Flux Capsule -", Journal of the Ceramic Society of Japan, Nippon Seramikkusu Kyokai, JP, JP , (19981001), vol. 106, no. 10, doi:10.2109/jcersj.106.1031, ISSN 0914-5400, pages 1031 - 1033, XP093216217
OPPOSITION- Wada Shigetaka, Kondo Yasuhito, Sudo Eiichi, Maki Yasuyuki, "Behavior of Oxygen and Carbon in Ball-Milled Si3N4 Powders during Heat Treatment and Sintering", Journal of the Ceramic Society of Japan, Nippon Seramikkusu Kyokai, JP, JP , (19990701), vol. 107, no. 7, doi:10.2109/jcersj.107.611, ISSN 0914-5400, pages 611 - 614, XP093216212
OPPOSITION- Shimamura Akihiro, Hotta Yuji, Hyuga Hideki, Kondo Naoki, Hirao Kiyoshi, "Effect of amounts and types of silicon nitride on thermal conductivity of Si<sub>3</sub>N<sub>4</sub>/epoxy resin composite", Ceramic Society of Japan. Journal, Nippon Seramikkusu Kyokai, Tokyo, JP, Tokyo, JP , (20150101), vol. 123, no. 1441, doi:10.2109/jcersj2.123.908, ISSN 1882-0743, pages 908 - 912, XP093317159

Download Citation Report

Get a free citation report including examiner, opposition, and international search citations.

Get Citation Report

Dossier Documents

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