US Patent Application No: 2012/0024,304

Number of patents in Portfolio can not be more than 2000

Filter Element Comprising Multifunctional Fibrous Smoke-Altering Material

ALSO PUBLISHED AS: 8720450

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A filter element for use in a smoking article and providing filtration of particulate material and gaseous components of mainstream smoke is provided. The filter element includes a segment of fibrous tow comprising a plurality of individual filaments, wherein each individual filament includes a plurality of adsorbent material particles at least partially encapsulated with a removable encapsulant imbedded therein. The individual filaments may further include an outer coating that provides a plurality of reactive groups adapted for reaction with one or more components of mainstream smoke. Alternatively, the multifunctional filter element combines different fibrous filter materials, such as cellulose acetate or polyolefin filaments combined with activated carbon filaments and at least one of ion exchange filaments and catalytic filaments. A method of providing a cellulose acetate fibrous tow containing an imbedded adsorbent material is provided, wherein a plurality of encapsulated adsorbent particles are mixed with a cellulose acetate dope.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
R. J. REYNOLDS TOBACCO COMPANYWINSTON-SALEM, NC347

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sebastian, Andries Don - 24 10

Cited Art Landscape

Patent Info (Count) # Cites Year
 
PHILIP MORRIS USA INC. (7)
* 6,209,547 Cigarette filter 26 1998
* 6,584,979 High efficiency cigarette filters having shaped microcavity fibers impregnated with adsorbent or absorbent materials 35 2001
* 7,152,609 Catalyst to reduce carbon monoxide and nitric oxide from the mainstream smoke of a cigarette 13 2003
* 2005/0133,050 Thiol-functionalized sorbent for smoking articles and filters for the removal of heavy metals from mainstream smoke 2 2003
* 2005/0263,163 Formation and deposition of sputtered nanoscale particles in cigarette manufacture 5 2004
* 2006/0144,410 Surface-modified activated carbon in smoking articles 10 2004
* 2007/0259,124 Method of making modified activated carbon 1 2007
 
R. J. REYNOLDS TOBACCO COMPANY (2)
* 2004/0134,631 Smoking article wrapping materials comprising ultrafine particles 23 2003
* 2006/0124,146 Wrapping materials for smoking articles 7 2006
 
BRITISH AMERICAN TOBACCO (INVESTMENTS) LIMITED (1)
* 6,631,722 Tobacco smoke filter elements 30 1994
 
Cerami Consulting Corp. (1)
* 6,615,842 Methods for removing nucleophilic toxins from tobacco smoke 12 2000
 
COCONA, INC. (1)
* 7,247,374 Encapsulated active particles and methods for making and using the same 4 2003
 
EASTMAN CHEMICAL COMPANY (1)
* 5,275,859 Tobacco smoke filter 31 1992
 
FILLIGENT LIMITED (1)
* 2009/0025,736 METHOD AND DEVICE FOR MAKING TOBACCO SMOKE FILTERS 1 2007
 
JOB ANCIENS ETS BARDOU JOB & PAUILAC, 13 RUE E. ZOLA, 66004 PERPIGNAN FRANCE (1)
* 4,379,465 Process for producing a filtering structure in particular for cigarette filters 15 1980
 
RHODIA ACETOW GMBH (1)
* 2005/0126,582 FILTER TOW 1 2004
 
TORAY INDUSTRIES, INC. (1)
* 4,700,723 Tobacco filter and fibrous ion exchange resin 22 1984
 
Other [Check patent profile for assignment information] (2)
* 2004/0074,507 Tobacco smoke filter elements 1 2003
* 2008/0135,060 Aldehyde removal 1 2006
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
PAPETERIES DU LEMAN (1)
* 8,580,081 Paper for smoking article having low ignition propensity properties 0 2011
* Cited By Examiner