(19)
(11) EP 0 535 695 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.04.1994 Bulletin 1994/15

(43) Date of publication A2:
07.04.1993 Bulletin 1993/14

(21) Application number: 92116894.4

(22) Date of filing: 02.10.1992
(51) International Patent Classification (IPC)5: A24B 15/16, A24F 47/00
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 03.10.1991 US 770394

(71) Applicant: PHILLIPS PETROLEUM COMPANY
Bartlesville Oklahoma 74004 (US)

(72) Inventors:
  • Kolts, John Henry
    Idaho Falls, ID 83405 (US)
  • Brown, Scott Hudson
    Bartlesville, OK 74006 (US)
  • Helm, Otis Euwane
    Copan, OK 74027 (US)
  • Harper, Timothy Patrick
    Ochelata, OK 74051 (US)

(74) Representative: Geissler, Bernhard, Dr.jur., Dipl.-Phys. et al
Patent- u. Rechtsanwälte Bardehle -Pagenberg-Dost-Altenburg- Frohwitter-Geissler & Partner Galileiplatz 1
81679 München
81679 München (DE)


(56) References cited: : 
   
       


    (54) Smoking article with carbon monoxide oxidation catalyst


    (57) The present invention relates to a cigarette-like smoking article (10) which is capable of producing substantial quantities of aerosol, both initially and over the useful life of the product, without significant thermal degradation of the aerosol former and without the presence of substantial pyrolysis or incomplete combustion products or sidestream aerosol.
    Embodiments of the present smoking article comprise a combustible fuel element (20), a physically separate CO oxidation catalyst (22) attached adjacent to the fuel element, a physically separate aerosol-generating means (24) including an aerosol forming material attached adjacent to the catalyst in conductive heat exchange relationship with the fuel element, and a means for delivering the generated aerosol to the user.
    The articles of the present invention provide the user with the taste, feel, and aroma associated with the smoking of conventional cigarettes without burning tobacco. The CO oxidation catalyst substantially decreases the level of CO inhaled by the user of such an article, by oxidizing the CO created by the burning fuel element to CO₂.






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