(19)
(11) EP 4 031 364 A1

(12)

(43) Date of publication:
27.07.2022 Bulletin 2022/30

(21) Application number: 20788876.9

(22) Date of filing: 16.09.2020
(51) International Patent Classification (IPC): 
B32B 3/26(2006.01)
B32B 29/00(2006.01)
B31D 5/02(2017.01)
B65D 3/22(2006.01)
 B32B 7/12(2006.01)
B31B 50/59(2017.01)
B65D 3/02(2006.01)
(52) Cooperative Patent Classification (CPC):
B32B 1/00; B32B 3/266; B32B 7/12; B32B 27/10; B32B 2250/02; B32B 2250/03; B32B 2255/12; B32B 2250/26; B32B 29/005; B32B 29/08; B32B 2307/7163; B32B 2439/70; B31B 50/592; B65D 65/466; B65D 1/34; B31B 2241/00; B31B 2120/40; Y02W 90/10; Y02A 40/90
(86) International application number:
PCT/IB2020/058601
(87) International publication number:
WO 2021/053527 (25.03.2021 Gazette 2021/12)
(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
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 19.09.2019 IT 201900016793

(71) Applicants:
  • Politecnico di Milano
    20133 Milano (IT)
  • GHELFI 1905 S.r.l.
    23010 Buglio in Monte (SO) (IT)

(72) Inventors:
  • CIGADA, Alberto
    20123 Milan (IT)
  • GHELFI, Giorgio
    23010 Buglio in Monte (SO) (IT)
  • SIMONCINI, Luca
    23010 Buglio in Monte (SO) (IT)
  • DEL CURTO, Barbara
    20131 Milan (IT)

(74) Representative: Gregorj S.r.l. 
Via L. Muratori, 13/b
20135 Milano
20135 Milano (IT)

   


(54) CONCAVE PRODUCTS, SEMIMANUFACTURES THEREOF AND PROCESSES FOR PREPARING THEM