(19)
(11) EP 0 480 568 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.12.1995 Bulletin 1995/49

(43) Date of publication A2:
15.04.1992 Bulletin 1992/16

(21) Application number: 91307443.1

(22) Date of filing: 13.08.1991
(51) International Patent Classification (IPC)5: G03C 1/494, G03C 1/498
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 31.08.1990 US 575834

(71) Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
St. Paul, Minnesota 55133-3427 (US)

(72) Inventors:
  • Krepski, Larry R., c/o Minnesota Mining and
    St. Paul, Minnesota 55133-3427 (US)
  • Sakizadeh, Kumars, c/o Minnesota Mining and
    St. Paul, Minnesota 55133-3427 (US)
  • Simpson, Sharon M., c/o Minnesota Mining and
    St. Paul, Minnesota 55133-3427 (US)
  • Whitcomb, David R, c/o Minnesota Mining and
    St. Paul, Minnesota 55133-3427 (US)

(74) Representative: Baillie, Iain Cameron et al
c/o Ladas & Parry 52-54 High Holborn
London WC1V 6RR
London WC1V 6RR (GB)


(56) References cited: : 
   
       


    (54) Post-processing stabilization of photothermographic emulsions


    (57) The post-processing stability of silver halide photothermographic emulsions is enhanced by the presence of stabilizng amounts of certain azlactones.





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