(19)
(11) EP 0 588 717 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.06.1994 Bulletin 1994/22

(43) Date of publication A2:
23.03.1994 Bulletin 1994/12

(21) Application number: 93402245.0

(22) Date of filing: 15.09.1993
(51) International Patent Classification (IPC)5: G03C 1/498
(84) Designated Contracting States:
BE DE FR GB IT

(30) Priority: 16.09.1992 US 945524

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

(72) Inventors:
  • Lepage, Teresa J., 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)
  • Bonham, James A., c/o Minnesota Mining and
    St.Paul, Minnesota 55133-3427 (US)
  • Lynch, Doreen C., c/o Minnesota Mining and
    St.Paul, Minnesota 55133-3427 (US)

(74) Representative: Warcoin, Jacques et al
Cabinet Régimbeau, 26, avenue Kléber
F-75116 Paris
F-75116 Paris (FR)


(56) References cited: : 
   
       


    (54) Post-processing stabilizers for photothermographic articles


    (57) Photothermographic compositions comprising a photographic silver halide, an organic silver salt, and a reducing agent for the organic silver salt, display improved stabilty in the presence of a compound having a nucleus of the formula :


    wherein :

    A represents any monovalent group for which the corresponding compound AH functions as a post-processing stabilizer,

    L is a -CO2- or a -CH20- group that is lost during or after the deblocking step, with A bonded to a carbon atom of this group, and

    n is 0 or 1.





    Search report