| Patents for A24D 3 - Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes (8,806) |
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| 04/05/1992 | WO1992005713A1 A combination for improved delivery of tobacco modifying agents |
| 03/25/1992 | EP0476969A1 Filter cigarette |
| 03/18/1992 | EP0474940A1 Concentric smoking filter having discrete tow and web filter media |
| 03/18/1992 | CN1015865B Process and equipment for producing cigarette filter |
| 03/18/1992 | CN1015864B Smoking article with improved mouthend piece |
| 03/11/1992 | CN1059267A Specific adsorbent of cigarette tar and its production process |
| 02/26/1992 | CN1058891A Anti-cancer poison-filtering cigarette |
| 02/19/1992 | CN2096219U Filter-tip cigarette |
| 01/28/1992 | US5083579 Impregnating with complex of iron salt and thiol containing ligand |
| 01/28/1992 | US5083578 Apparatus for removing toxic materials contained in tobacco and methods therefor |
| 01/22/1992 | EP0467658A2 Catalytic conversion of carbon monoxide from carbonaceous heat sources |
| 01/19/1992 | WO1992001487A1 Article for smoking |
| 01/15/1992 | EP0466114A2 Tobacco flavored filter for smoking products and method of producing same |
| 01/15/1992 | CN2092877U Automatic controller for cigarette filter-tip rod runing strip |
| 01/08/1992 | EP0464324A2 A preparation method of a flavoring granule for tobacco products |
| 01/08/1992 | CN1057574A Adhesive-bonded fabric for use in cigarette filter and its fabrication |
| 01/01/1992 | CN2091546U Cancer-resistant cigarette holder |
| 12/31/1991 | US5076295 Cigarette filter |
| 12/31/1991 | US5076294 Longitudinally segmented; organic acid; reduces yields of mainstream formaldehyde |
| 12/24/1991 | US5074321 Cigarette |
| 12/24/1991 | US5074320 Paper with metal hydroxide filler alkalinity; low filtering efficiency of particulates, high pressure drop |
| 12/18/1991 | EP0461162A1 Uniform tar delivery profile filter. |
| 12/18/1991 | CN2090623U Changeable smell cigarette filter-tip for dry or wet use |
| 12/17/1991 | CA1293098C Manufacture of tobacco smoke filters |
| 12/11/1991 | CN1056910A Technique of seperating main contents from cigarette end with filter tip |
| 12/11/1991 | CN1056805A Nonwoven filter and method of manufacture |
| 12/10/1991 | US5070891 Core of organoleptic composition in polymer, and barrier polymer |
| 12/04/1991 | CN2089707U Poison filter cigarette |
| 12/04/1991 | CN1014953B Rod making apparatus for smoking article mfr. |
| 12/03/1991 | US5069231 Method for imparting functional ingredients, functional ingredient-imparting articles and methods for preparation and use thereof |
| 11/26/1991 | US5067500 Container for additive materials for smoking articles |
| 11/20/1991 | CN1056228A Electromagnetic wave method for modifying taste of tobacco and cigarette with electric conductor |
| 11/19/1991 | US5065800 Liquid charging method and a liquid charging apparatus |
| 11/19/1991 | CA1292164C Tar removing cigarette holder |
| 11/14/1991 | WO1991016826A1 Hydrophilic microporous membrane |
| 11/12/1991 | US5063945 Twisted, crystalline polyolefin filaments |
| 11/12/1991 | CA1291916C Fiber separator |
| 11/07/1991 | DE4013293A1 Cigarette filter contg. irregularly oriented fibres - comprises spun poly:hydroxybutyric acid or copolymer of hydroxybutyric acid and poly:hydroxy:valeric acid |
| 11/06/1991 | CN2087881U New-type cigarette with high-efficient filter-tip |
| 11/05/1991 | WO1991017297A1 Nonwoven filter and method of manufacture |
| 11/05/1991 | CA2082058A1 Nonwoven filter and method of manufacture |
| 10/30/1991 | EP0454075A2 Process for manufacturing cigarette filters |
| 10/30/1991 | CN1055654A Cigarette's filter tip composed of polypropylene fibre containing adhesive |
| 10/29/1991 | US5060676 Process for making a carbon heat source and smoking article including the heat source and a flavor generator |
| 10/29/1991 | US5060672 Synergistic scavengers for formaldehyde; unsaturated diols; cigarette smoke; anticarcinogenic agents |
| 10/29/1991 | US5060669 Tobacco treatment process |
| 10/29/1991 | US5060665 Wrapping mechanism for rod making machines of the tobacco processing industry |
| 10/29/1991 | US5060664 Method of and apparatus for making streams containing fibrous materials of the tobacco processing industry |
| 10/23/1991 | EP0453299A1 Cigarette smoke filter |
| 10/23/1991 | EP0452906A2 Apparatus for alternately arranging the direction of an article |
| 10/23/1991 | CN2086979U Sedimentation type filter tar-nicotine |
| 10/22/1991 | US5058608 Filter cigarette |
| 10/15/1991 | US5056537 Cigarette |
| 10/09/1991 | EP0253830B1 Cigarette making machines |
| 10/09/1991 | CN2086062U Gas protection cigarette holder |
| 10/03/1991 | WO1991014381A1 Pure clean cigarette filter |
| 10/02/1991 | EP0448977A2 Method and device for the manufacture of a coaxial tobacco or filter rod |
| 10/02/1991 | DE4009657A1 Forming coaxial tobacco or filter strand |
| 10/01/1991 | US5053066 Nonwoven filter and method of manufacture |
| 10/01/1991 | US5052415 Process for the impregnation of fibers of a tobacco smoke filter with dicarboxylic or polycarboxylic acids or anhydrides thereof |
| 10/01/1991 | US5052414 Cigarette perforation apparatus and method |
| 09/24/1991 | CA1289433C Cigarette filter |
| 09/19/1991 | WO1991013558A1 Filter-tipped cigarette |
| 09/17/1991 | US5048546 Filter and method of treating tobacco smoke to reduce materials harmful to health |
| 09/11/1991 | CN1054355A Both dry and wet applications and smell changeable filter tip of cigarette |
| 09/11/1991 | CN1013824B Machinery and method for manufacturing rod containing pelletized material |
| 09/03/1991 | US5044381 Closed cigarette filter |
| 08/29/1991 | WO1991012737A1 Tobacco smoke filter material and process for production thereof |
| 08/29/1991 | CA2075814A1 Tobacco smoke filter material and process for production thereof |
| 08/28/1991 | EP0443749A2 Cigarette or cigar |
| 08/21/1991 | EP0442722A1 Filters for smoking rods |
| 08/14/1991 | CA2036202A1 Filters for smoking rods |
| 08/13/1991 | US5038803 Method and device for control of by-products from cigarette smoke |
| 08/08/1991 | DE4003051A1 Mfr. of cigarette filter tips - involves softening agent before spraying it onto tips |
| 07/31/1991 | CN1053351A Vegetable propylene cigarette filter tip |
| 07/23/1991 | US5033484 Ventilated filter cigarette |
| 07/17/1991 | EP0436599A1 Tobacco smoke filters and process for production thereof |
| 07/10/1991 | CN1052778A Method for preparing cigarette filter from laminated fibre material |
| 07/02/1991 | US5027837 Cigarette |
| 06/26/1991 | EP0434339A2 Cigarette and cigarette filter element therefor |
| 06/26/1991 | EP0434333A2 Tobacco extract treatment process |
| 06/26/1991 | EP0434332A2 Cigarette and cigarette filter element therefor |
| 06/26/1991 | CN1052422A Particulate sorbent smoke filter |
| 06/25/1991 | US5025815 Orientating, fibrillating, crimping |
| 06/25/1991 | US5025814 Cigarette filters containing strands of tobacco-containing materials |
| 06/19/1991 | EP0432663A1 Apparatus for forming micro-holes in cigarettes |
| 06/19/1991 | CA2032380A1 Tobacco treatment process |
| 06/19/1991 | CA2032379A1 Cigarette and cigarette filter element therefor |
| 06/19/1991 | CA2032378A1 Cigarette and cigarette filter element therefor |
| 06/12/1991 | CN1052031A Adsorbent for low-tar cigarette |
| 06/11/1991 | US5022964 Cellulose ester fibers/fibrets with minor amount of activated fusible fibers uniformly dispersed; dustless, dimensional stability |
| 05/29/1991 | CN2077640U High efficiency cigarette filters |
| 05/29/1991 | CN1051661A Efficient selective absorbent |
| 05/28/1991 | US5019262 Hydrophilic microporous membrane |
| 05/27/1991 | CA2004225A1 Cigarette filter |
| 05/22/1991 | CN2077201U Super-long filter tip |
| 05/22/1991 | CN1051493A Cleaning machine of waste filter tip rods |
| 05/15/1991 | EP0277991B1 Smoking rod wrapper and compositions for their production |
| 05/15/1991 | CN2076761U Compound cutting tool |
| 05/15/1991 | CN1051293A Tobacco filter tip made up of polypropylene fibre and the prodn. method |