EP 3 800 003 A1 EUROPEAN SEARCH REPORT Application Number EP 20 19 7630 Europäisches Patentamt European Patent Office Office européen des brevets DOCUMENTS CONSIDERED TO BE RELEVANT Category Citation of document with indication, where appropriate, Relevant CLASSIFICATION OF THE of relevant passages to claim APPLICATION (IPC) CN 104 942 481 A (INST CHEM IND FOREST INV. PROD CAF) 30 September 2015 (2015-09-30) B23K35/36 * abstract * * paragraph [0011] - paragraph [0017] * * paragraph [0023] * * paragraph [0040] * CN 104 858 571 A (SHENZHEN TONGFANG -3,5- ELECTRONIC NEW MATERIAL CO LTD ET AL.) : 26 August 2015 (2015-08-26) * abstract * * example 5 * CN 106 514 056 A (CHANGZHOU DINGSHENG ENV |1-3, PROT TECH CO LTD) 11 22 March 2017 (2017-03-22) * abstract * * example 1 * CN 102 513 739 A (SHENZHEN EARLYSUN -3, TECHNOLOGY CO LTD) | 27 June 2012 (2012-06-27) SEARCHED | ) * abstract * B23K * example 6 * Place of search Date of completion of the search Examiner The Hague 10 November 2020 Rosciano, Fabio CATEGORY OF CITED DOCUMENTS T : theory or principle underlying the invention E: earlier patent document, but published on, or X: particularly relevant if taken alone after the filing date Y : particularly relevant if combined with another D : document cited in the application document of the same category L : document cited for other reasons A: technological background ©: non-written disclosure & : member of the same patent family, corresponding P : intermediate document document Ke EPO FORM 1503 03.82 (PO4C01) 15