(19)
(11) EP 4 823 718 A1

(12)

(43) Date of publication:
21.10.2026 Bulletin 2026/43

(21) Application number: 24828468.9

(22) Date of filing: 13.12.2024
(51) International Patent Classification (IPC): 
B01D 53/94(2006.01)
B01J 29/72(2006.01)
B01J 35/57(2024.01)
B01J 37/00(2006.01)
B01J 37/14(2006.01)
 B01J 23/42(2006.01)
B01J 35/00(2024.01)
B01J 35/64(2024.01)
B01J 37/02(2006.01)
F01N 3/20(2006.01)
(52) Cooperative Patent Classification (CPC):
B01D 53/9436; B01D 2255/1021; B01D 2255/20761; B01D 2255/50; B01D 2255/9022; B01D 2255/9205; B01D 2257/406; B01D 2258/012; B01J 23/42; B01J 35/19; B01J 35/57; B01J 37/0244; B01J 37/0246; B01J 37/0248; B01J 37/0018; F01N 3/2066; B01J 29/763; Y02T 10/12; Y02A 50/20
(86) International application number:
PCT/GB2024/053108
(87) International publication number:
WO 2025/125817 (19.06.2025 Gazette 2025/25)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 15.12.2023 US 202363610423 P

(71) Applicant: Johnson Matthey Public Limited Company
Royston SG8 5HE (GB)

(72) Inventors:
  • BERNARDINI, Cecilia
    Reading, RG4 9NH (GB)
  • BOUNECHADA, Djamela
    Reading, RG4 9NH (GB)
  • CHANDLER, Guy Richard
    Royston Hertfordshire SG8 5HE (GB)
  • GREEN, Alexander Nicholas Michael
    Royston Hertfordshire SG8 5HE (GB)
  • GREENHAM, Neil
    Royston Hertfordshire SG8 5HE (GB)
  • JENKINS, Caitlin Lucy
    Royston Hertfordshire SG8 5HE (GB)
  • MCPHIE, Alfie
    Abingdon, OX14 3DB (GB)
  • MANTAROSIE, Loredana
    Reading, RG4 9NH (GB)
  • PAGE, Samuel
    Royston Hertfordshire SG8 5HE (GB)
  • PASCUI, Andrea Eva
    Royston Hertfordshire SG8 5HE (GB)

(74) Representative: Johnson Matthey Public Limited Company 
Blounts Court Road, Sonning Common Intellectual Property Department
Reading RG4 9NH
Reading RG4 9NH (GB)

   


(54) AMMONIA SLIP CATALYST