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Browse by Category: Main > Plants, Animals & Agriculture
Class Information
Number: 131/342
Name: Tobacco > Smoke separator or treater > Plural diverse elements > Including particulate material
Description: Product or process wherein at least one of the elements comprises a plurality of small particles.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
5947127 Tobacco filters and method of producing the same Sep. 7, 1999
5913311 Cigarette filter and filter material therefor Jun. 22, 1999
5911224 Biodegradable polyvinyl alcohol tobacco smoke filters, tobacco smoke products incorporating such filters, and methods and apparatus for making same Jun. 15, 1999
5896861 Process for aromatizing and/or filtering tobacco smoke, cigarette end piece for carrying out the process and use of this process Apr. 27, 1999
5856006 Tobacco filter material and a method for producing the same Jan. 5, 1999
5839449 Low CO cigarette Nov. 24, 1998
5732718 Selective filtration device Mar. 31, 1998
5713377 Tobacco cartridge Feb. 3, 1998
5706833 Tobacco filters and method of producing the same Jan. 13, 1998
5664586 Tobacco smoke filters and filter rods therefor Sep. 9, 1997
5662126 Smoke filter containing particulate smoke modifying additive Sep. 2, 1997
5647383 Photodegradable cellulose ester tow Jul. 15, 1997
5622190 Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core Apr. 22, 1997
5617882 Tobacco smoking article filter with basalt fibers Apr. 8, 1997
5618620 Filter rod for filtering the smoke of a cigarette Apr. 8, 1997
5575302 Filter for removing nitrogen oxides from tobacco smoke Nov. 19, 1996
5568819 Cigarette filter Oct. 29, 1996
5549125 Relating to smoking articles Aug. 27, 1996
5462801 Filter Tow, method for the production thereof, as well as tobacco smoke filter element and method for its production Oct. 31, 1995
5423336 Ventilated filter cigarette Jun. 13, 1995
5404890 Cigarette filter Apr. 11, 1995
5365951 Concentric smoking filter having cellulose acetate tow periphery and carbon-particle-loaded web filter core Nov. 22, 1994
5360023 Cigarette filter Nov. 1, 1994
5327916 Filter tip cagarette Jul. 12, 1994
5307823 Rod of smoking material and cigarettes made therefrom May. 3, 1994
5246017 Cigarette and cigarette filter element therefor Sep. 21, 1993
5191905 Filter cigarette having filter containing absorptive synthetic graft polymer fibers produced from irradiated polyethylene reacted with vapor phase styrene or absorptive synthetic magnetic fibe Mar. 9, 1993
5178166 Filter cigarette Jan. 12, 1993
5150723 Process for the production of tobacco smoke filters Sep. 29, 1992
5115824 Filtration of tobacco using moisture free, electrically neutral hydrophobic particles May. 26, 1992
5105834 Cigarette and cigarette filter element therefor Apr. 21, 1992
5083579 Composition for absorbing nitrogen oxide from tobacco smoke, method for absorbing nitrogen oxide using said composition, filter for purifying tobacco smoke using said composition, and method f Jan. 28, 1992
5076294 Filter cigarette Dec. 31, 1991
5074320 Cigarette and cigarette filter Dec. 24, 1991
5060672 Highly efficient tobacco smoke filter Oct. 29, 1991
5052415 Process for the impregnation of fibers of a tobacco smoke filter with dicarboxylic or polycarboxylic acids or anhydrides thereof Oct. 1, 1991
5048546 Filter and method of treating tobacco smoke to reduce materials harmful to health Sep. 17, 1991
5038803 Method and device for control of by-products from cigarette smoke Aug. 13, 1991
5012828 Tobacco smoke filter containing particulate additive May. 7, 1991
5009239 Selective delivery and retention of aldehyde and nicotine by-product from cigarette smoke Apr. 23, 1991
4964426 Tobacco smoke filters and process for production thereof Oct. 23, 1990
4930526 Mild ciga stick Jun. 5, 1990
4896683 Selective delivery and retention of nicotine by-product from cigarette smoke Jan. 30, 1990
4858629 Increased volume synthetic fibres, procedure for producing them and their use, in particular for filters Aug. 22, 1989
4827950 Method for modifying a substrate material for use with smoking articles and product produced thereby May. 9, 1989
4811745 Method and device for control of by-products from cigarette smoke Mar. 14, 1989
4805644 Sidestream reducing cigarette paper Feb. 21, 1989
4770193 Manufacture of tobacco smoke filters Sep. 13, 1988
4763674 Method and device for controlling hydrogen cyanide and nitric oxide concentrations in cigarette smoke Aug. 16, 1988
4756319 Process for producing granular algal adsorbents Jul. 12, 1988

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