{"id":10943,"date":"2026-08-26T16:24:23","date_gmt":"2026-08-26T16:24:23","guid":{"rendered":"https:\/\/www.dhenne-avocats.fr\/contentieux-des-brevets\/action-en-nullite-brevet\/"},"modified":"2026-08-26T16:26:44","modified_gmt":"2026-08-26T16:26:44","slug":"action-en-nullite-brevet","status":"publish","type":"page","link":"https:\/\/www.dhenne-avocats.fr\/en\/contentieux-des-brevets\/action-en-nullite-brevet\/","title":{"rendered":"Patent revocation actions"},"content":{"rendered":"<p><strong>Pourquoi attaquer un brevet.<\/strong> Un brevet non valable est une barri\u00e8re ill\u00e9gitime : l&rsquo;action en nullit\u00e9 (art. L. 613-25 CPI ; pour le brevet europ\u00e9en, art. 138 CBE) permet de lib\u00e9rer un march\u00e9, de pr\u00e9parer un lancement ou de neutraliser une menace contentieuse. La nullit\u00e9 prononc\u00e9e a un effet absolu (art. L. 613-27 CPI) : elle vaut \u00e0 l&rsquo;\u00e9gard de tous, pas seulement des parties.<\/p>\n<h2>Les causes de nullit\u00e9<\/h2>\n<p>D\u00e9faut de nouveaut\u00e9 ou d&rsquo;activit\u00e9 inventive au regard de l&rsquo;art ant\u00e9rieur, insuffisance de description, extension de l&rsquo;objet au-del\u00e0 de la demande telle que d\u00e9pos\u00e9e, extension de la protection apr\u00e8s d\u00e9livrance. Chaque cause appelle une m\u00e9thode : recherche d&rsquo;ant\u00e9riorit\u00e9s (bases brevets et litt\u00e9rature technique), reconstruction de l&rsquo;\u00e9tat de la technique \u00e0 la date de d\u00e9p\u00f4t, lecture des revendications avec l&rsquo;homme du m\u00e9tier pour boussole.<\/p>\n<h2>Choisir son terrain<\/h2>\n<p>La nullit\u00e9 se plaide devant le Tribunal judiciaire de Paris, devant la <a href=\"\/en\/fields-of-expertise\/jub\/\">UPC<\/a> (action en r\u00e9vocation), ou devant l&rsquo;OEB par la voie de l&rsquo;opposition \u2014 dans les neuf mois de la d\u00e9livrance (art. 99 CBE) \u2014 chacune avec ses d\u00e9lais, ses co\u00fbts et ses effets territoriaux. Le titulaire peut riposter en limitant ses revendications (art. L. 613-24 CPI ; art. 105 bis CBE). Nous pratiquons ces proc\u00e9dures en attaque comme en d\u00e9fense, et c&rsquo;est pr\u00e9cis\u00e9ment cette double pratique qui rend nos analyses de validit\u00e9 r\u00e9alistes.<\/p>\n<p><strong>Un brevet vous bloque ? <a href=\"\/en\/french-patent-litigator-contact-us\/\">Faisons \u00e9valuer sa solidit\u00e9<\/a>.<\/strong><\/p>\n<p>See also: <a href=\"\/en\/contentieux-des-brevets\/\">Patent litigation<\/a> et notre article <a href=\"\/en\/la-nullite-dun-brevet-en-france-motifs-procedures-enjeux\/\">La nullit\u00e9 d&rsquo;un brevet en France<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Pourquoi attaquer un brevet. Un brevet non valable est une barri\u00e8re ill\u00e9gitime : l&rsquo;action en nullit\u00e9 (art. L. 613-25 CPI ; pour le brevet europ\u00e9en, art. 138 CBE) permet de lib\u00e9rer un march\u00e9, de pr\u00e9parer un lancement ou de neutraliser une menace contentieuse. La nullit\u00e9 prononc\u00e9e a un effet absolu (art. L. 613-27 CPI) : [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":10937,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-10943","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Action en nullit\u00e9 de brevet \u2014 Avocats | Dhenne Avocats<\/title>\n<meta name=\"description\" content=\"Faire annuler un brevet : nouveaut\u00e9, activit\u00e9 inventive, insuffisance de description ; nullit\u00e9 principale ou reconventionnelle ; articulation avec l&#039;OEB.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dhenne-avocats.fr\/en\/contentieux-des-brevets\/action-en-nullite-brevet\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Action en nullit\u00e9 de brevet \u2014 Avocats | Dhenne Avocats\" \/>\n<meta property=\"og:description\" content=\"Faire annuler un brevet : nouveaut\u00e9, activit\u00e9 inventive, insuffisance de description ; 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