IP Verse

A Process For The Continuous Preparation Of Alpha-Calcium Sulphate Hemihydrate And A Particulate Gypsum - EP4059904

The patent EP4059904 was granted to Saint Gobain on Sep 6, 2023. The application was originally filed on Mar 19, 2021 under application number EP21305344A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

EP4059904

SAINT GOBAIN
Application Number
EP21305344A
Filing Date
Mar 19, 2021
Status
Granted And Under Opposition
Aug 4, 2023
Grant Date
Sep 6, 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

KNAUF INSULATIONJun 5, 2024MEISSNER BOLTE PARTNERSCHAFT MBBADMISSIBLE

Patent Citations (10) New

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

Citation PhasePublication Number
OPPOSITIONCN101058488
OPPOSITIONCN108840646
OPPOSITIONEP2418184
OPPOSITIONJP2004307321
OPPOSITIONUS2009208392
OPPOSITIONUS2012090508
OPPOSITIONWO0179116
SEARCHCN102786241
SEARCHCN112408936
SEARCHUS2009208392

Non-Patent Literature (NPL) Citations (9) New

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

Citation PhaseReference Text
OPPOSITION- Anonymous, "Mikro ACM Classifier Mill ", HOSOKAWA ALPINE, (20140101), HOSOKAWA ALPINE, URL: https://www.hosokawa.co.uk/wp-content/uploads/2021/09/0026-EN-2014-04-Mikro-ACM-Classifier-Mill.pdf, XP093191857
OPPOSITION- Hartmann, M., Fischer, H.B & Aschern, W., "Alpha-Halbhydrat aus Gipsfaserplattenreststoffen", Tagungsbericht / 1. Weimarer Gipstagung, 30. - 31. März 2011, Weimar, Bundesrepublik Deutschland = Weimar Gypsum Conference, F. A. Finger-Institut für Baustoffkunde, Bauhaus-Universität Weimar. [Red.: H.-B. Fischer ...], (20110330), ISBN 978-3-00-034074-1, pages 261 - 271, XP008172307
OPPOSITION- Huang Tingjie, Yuan Qiang, He Fuqiang, Xie Youjun, "Understanding the mechanisms behind the time-dependent viscoelasticity of fresh C3A-gypsum paste", CEMENT AND CONCRETE RESEARCH., PERGAMON PRESS, ELMSFORD, NY., US, US , (20200701), vol. 133, doi:10.1016/j.cemconres.2020.106084, ISSN 0008-8846, page 106084, XP093191848
OPPOSITION- Liu Chengjun; Zhao Qing; Wang Yeguang; Shi Peiyang; Jiang Maofa, "Hydrothermal synthesis of calcium sulfate whisker from flue gas desulfurization gypsum", CHINESE JOURNAL OF CHEMICAL ENGINEERING, CHEMICAL INDUSTRY PRESS, BEIJING, CN, CN , (20160427), vol. 24, no. 11, doi:10.1016/j.cjche.2016.04.024, ISSN 1004-9541, pages 1552 - 1560, XP029837332
OPPOSITION- Liu Hao; Wang Shoude; Huang Yongbo; Melugiri-Shankaramurthy Bharath; Zhang Shuxin; Cheng Xin, "Effect of SCMs on the freeze-thaw performance of iron-rich phosphoaluminate cement", Construction and Building Materials, Elsevier, Netherlands, Netherlands , (20190921), vol. 230, doi:10.1016/j.conbuildmat.2019.117012, ISSN 0950-0618, XP085897649
OPPOSITION- Macedo Portela da Silva Nayane; Rong Yi; Espitalier Fabienne; Baillon Fabien; Gaunand Alain, "Solvothermal recrystallization of α-calcium sulfate hemihydrate: Batch reactor experiments and kinetic modelling", Journal of Crystal Growth, ELSEVIER, AMSTERDAM, NL, AMSTERDAM, NL , (20170214), vol. 472, doi:10.1016/j.jcrysgro.2017.02.010, ISSN 0022-0248, pages 46 - 53, XP085064242
OPPOSITION- Caillahua Mariella Cortez, Moura Francisco José, "Technical feasibility for use of FGD gypsum as an additive setting time retarder for Portland cement", Journal of Materials Research and Technology, Elsevier Editora Ltda, BR, BR , (20180401), vol. 7, no. 2, doi:10.1016/j.jmrt.2017.08.005, ISSN 2238-7854, pages 190 - 197, XP093191849
OPPOSITION- Hao Xiaowen, Zhang Zhijun, Liu Ran, "Study on Particles Wetted by the Calcium-Based Slurries and the Slurries Viscosity with the Wetting Agents", THE OPEN CHEMICAL ENGINEERING JOURNAL, Bentham Open, NL, NL , (20150930), vol. 9, no. 1, doi:10.2174/1874123101509010103, ISSN 1874-1231, pages 103 - 108, XP093191851
SEARCH- MBASHA W. ET AL., "The influence of sulfate availability on rheology of fresh cement paste", APPLIED RHEOLOGY, (20200930), vol. 30, no. 1, pages 54 - 63, XP002804023 [X] 15 * table 2 *

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