(19)
(11) EP 3 536 606 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
29.03.2023 Bulletin 2023/13

(45) Mention of the grant of the patent:
22.02.2023 Bulletin 2023/08

(21) Application number: 19160519.5

(22) Date of filing: 04.03.2019
(51) International Patent Classification (IPC): 
B64C 3/18(2006.01)
B29D 99/00(2010.01)
 B64C 3/26(2006.01)
(52) Cooperative Patent Classification (CPC):
B64C 3/182; B64C 3/26; B29D 99/0005; B29C 70/302; Y02T 50/40

(54)

STRINGER STIFFENED COMPOSITE PANELS HAVING IMPROVED PULL-OFF STRENGTH

TRÄGERVERSTEIFTE VERBUNDPLATTEN MIT VERBESSERTER ABZIEHFESTIGKEIT

PANNEAUX COMPOSITES RENFORCÉS PAR LONGERON PRÉSENTANTS UNE MEILLEURE RÉSISTANCE AU PELAGE

(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 06.03.2018 US 201815913488

(43) Date of publication of application:
11.09.2019 Bulletin 2019/37

(73) Proprietor: The Boeing Company
Arlington, VA 22202 (US)

(72) Inventors:
  • BEHZADPOUR, Forouzan
    Chicago, IL 60606-1596 (US)
  • CHENG, Jiangtian
    Chicago, IL 60606-1596 (US)

(74) Representative: Morrall, Jonathan Ian McLachlan 
Kilburn & Strode LLP Lacon London 84 Theobalds Road
London WC1X 8NL
London WC1X 8NL (GB)


(56) References cited: : 
WO-A1-2015/020675
   
  • A MUKHERJEE ET AL: "Design guidelines for ply drop-off in laminated composite structures", COMPOSITES:PART B, vol. 32, no. 2, 1 January 2001 (2001-01-01), pages 153-164, XP055600783, AMSTERDAM, NL ISSN: 1359-8368, DOI: 10.1016/S1359-8368(00)00038-X
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).