(19)
(11) EP 4 267 802 A1

(12)

(43) Date of publication:
01.11.2023 Bulletin 2023/44

(21) Application number: 22756790.6

(22) Date of filing: 15.02.2022
(51) International Patent Classification (IPC): 
E02D 3/00(2006.01)
E02D 35/00(2006.01)
(52) Cooperative Patent Classification (CPC):
E02D 35/00; E02D 3/12
(86) International application number:
PCT/US2022/016493
(87) International publication number:
WO 2022/177920 (25.08.2022 Gazette 2022/34)
(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: 16.02.2021 US 202117176192

(71) Applicants:
  • Allen, III, Laurence E.
    San Rafael, California 94901 (US)
  • Allen, IV, Laurence E.
    San Rafael, California 94901 (US)

(72) Inventors:
  • Allen, III, Laurence E.
    San Rafael, California 94901 (US)
  • Allen, IV, Laurence E.
    San Rafael, California 94901 (US)

(74) Representative: Jaeger, Michael David 
Withers & Rogers LLP 2 London Bridge
London SE1 9RA
London SE1 9RA (GB)

   


(54) SUBTERRANEAN PLACEMENT OF LIGNOCELLULOSIC MATERIALS