Cigarette filter

Details Cigarette filter Cigarette filter

2007-06-12

2007-06-12

Mayes, Dionne W. (Department: 1731)

Tobacco

Smoke separator or treater

Plural diverse elements

C131S341000, C131S202000, C131S207000, C131S344000

Reexamination Certificate

active

10767056

ABSTRACT:
A cigarette filter has filter sections including filter materials individually wrapped with plug wrap paper, forming paper for wrapping the filter sections integrally, and tipping paper covering the forming paper so as to connect the filter sections to a cigarette section to form a cigarette, wherein activated charcoal and an inorganic mineral-based porous material carrying ferrous sulfate/L-ascorbic acid are contained as adsorbents in at least one of the filter materials and a space between the filter materials.

REFERENCES:
patent: 5404890 (1995-04-01), Gentry et al.
patent: 5662126 (1997-09-01), Charlton et al.
patent: 6779529 (2004-08-01), Figlar et al.
patent: 61-100998 (1986-06-01), None
patent: 63-160659 (1987-07-01), None
patent: 4-267871 (1992-09-01), None
patent: 7-67613 (1995-03-01), None
patent: 00/35580 (2000-06-01), None
patent: 2000-246095 (2000-09-01), None

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