Tobacco – Tobacco users' appliance – Device used for smoking
Reexamination Certificate
1998-06-30
2003-04-22
Griffin, Steven P. (Department: 1731)
Tobacco
Tobacco users' appliance
Device used for smoking
C131S360000, C131S361000, C131S331000
Reexamination Certificate
active
06550483
ABSTRACT:
The subject invention relates to smoking articles comprising a rod of smoking material and a smoke filter.
It has been proposed in respect of cigarettes to provide filters therefor which exhibit enhanced moisture-induced disintegration characteristics. One such filter is disclosed in EP 612 482.
In WO 94/16581 there is proposed a filter cigarette the filter plug of the filter of which cigarette embodies a substance which expands upon contact with water. It is envisaged in WO 94/16581 that such expansion of the substance causes expansion of the filter plug and that this expansion of the filter plug will result in rupture of the respective materials of both the plugwrap and the tipping, the stated object of such rupture being the exposure to the environment of a greater area of the filter material of the filter plug thus to enhance the biodegradation of the filter material.
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patent: 5709227 (1998-01-01), Arzonico et al.
patent: 5758669 (1998-06-01), Taniguchi et al.
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patent: 947272 (1997-02-01), None
patent: WO 9416581 (1994-08-01), None
“To Avoid Consumer Resistance By Using Filtrona's New Puracel Filters, Cigarette Manufacturers May Reduce ‘Tar’ Yields Without Boosting Pressure Drop”, TR Tobacco Reporter, Sep. 1989, p. 34.
“Paper” & “Paperless”, The Oxford Encyclopedic English Dictionary, 1991, p. 1052.
“Paper”, Longman Dictionary of the English Language, 1984, p. 1062.
“Cellulose Acetates” and “Paper”, The Wordsworth Dictionary of Science & Technology, 1988, p. 144 & 646.
“Paper”, The New Encyclopaedia Britaqnnica, vol. 9, 1986, p. 126.
“Paper”, The Webster's Third New International Dictionary, 1966.
British-American Tobacco (Investments) Limited
Griffin Steven P.
Pitney Hardin Kipp & Szuch LLP
Walls Dionne A.
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