Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7243659 | Recess filter and smokeable article containing a recess filter The invention relates to a recess filter with a cavity associated with the mouth and provided with a cavity wall, in addition to one or more filter elements associated with the tobacco. The cavity wall surrounds either the cavity or the cavity and, at the most, one ... | 07/17/2007 |
| 6568402 | Multi-ply cigarette filter wrapper The cigarette filter wrapper paper has a paper layer which has a first surface and a second surface. The filter wrapper paper exhibits a first overlap air permeability, measured when a perforated tip paper is overlapped on the first surface, and a second ... | 05/27/2003 |
| 6530377 | Cigarette filter containing dry water and a porphyrin A tobacco smoke filter comprising a porous substrate comprising dry water and a porphyrin dispersed therein. The porous substrate can further comprise microcapsules. The microcapsules can comprise one or more substances selected from the group consisting ... | 03/11/2003 |
| 6502580 | Hypobaric cigarette filter device The invention is a tar retention device for insertion in the smoke path of a cigarette between the point of combustion and the smoker. The device is comprised of a chamber with an inlet duct formed on the side of the point of combustion and outlet side fa... | 01/07/2003 |
| 6422244 | Filter for a cigarette and filter cigarette A filter for a cigarette and a filter cigarette which make a smoking feeling much milder without the original cigarette taste and aroma being spoiled are provided. The cigarette filter has a filter rod 8 having an air permeable peripheral surface, and 3 t... | 07/23/2002 |
| 6371127 | Cigarette sidestream smoke and free-burn rate control device A device for minimizing cigarette sidestream smoke and reducing the free-burn rate of a burning cigarette, the device comprises: I) a non-combustible tubular element (12) encasing an effective length of a tobacco charge (22) of a cigarette (14) located in... | 04/16/2002 |
| 6367481 | Cigarette having reduced sidestream smoke A cigarette includes an ignition element in contact with tobacco, surrounded by a composite outer wrapper. The outer wrapper is impervious to oxygen causing the tobacco to extinguish between puffs. The ignition element, however, has a longer static burn t... | 04/09/2002 |
| 6286516 | Cigarette sidestream smoke treatment material A cigarette sidestream smoke treatment material made from a sheet of non-combustible active components provides a porous structure capable of treating sidestream smoke. The treatment material, as used in combination with a cigarette, provides a low sidest... | 09/11/2001 |
| 6182669 | Requisite for reducing emissions of side stream smoke from a cigarette A smoker's requisite for reducing the amount of smoke given off by the smouldering tip of a cigarette. The requisite consists of a rigid sleeve that may be slid along a cigarette and momentarily positioned over the smouldering tip thereof then withdrawn t... | 02/06/2001 |
| 6164288 | Cigarette filter containing dry water and microcapsules A tobacco smoke filter containing a porous substrate having dry water and microcapsules dispersed therein. The microcapsules contain at least one compound selected from the group consisting of chlorophyllin, methylcellulose, sodium pyroglutamate and a veg... | 12/26/2000 |
| 6089238 | Ultralight coaxial cigarette including a multipart filter The invention relates to a coaxial cigarette including a coaxial tobacco rod comprising a rod core, a rod core wrapping, a rod jacket and a rod jacket wrapping and a multi-part ventilated filter wherein the filter comprises a filter wrapping as well as at... | 07/18/2000 |
| 6067995 | Coaxial cigarette having cross stream barrier The invention relates to a coaxial cigarette including a rod comprising a rod core, a rod core wrapping, a rod jacket and a rod jacket wrapping; and a filter comprising a filter core, a filter core wrapping, a filter jacket and a filter jacket wrapping, a... | 05/30/2000 |
| 5996587 | Smoking articles Smoking articles, cigarettes for example, having a tar delivery of not more than 6 mg a filter ventilation of at least 50% and a ventilation zone located not less than 75% of the length of the filter from the mouth and thereof exhibit enhanced mainstream ... | 12/07/1999 |
| 5979459 | Ventilated filter cigarette with a coaxial filter element The invention refers to a ventilated filter cigarette comprising a tobacco rod, a wrapper for the tobacco rod and a filter ventilated through ventilation openings, including a coaxial filter element, comprising a filter core, a wrapper for the filter core... | 11/09/1999 |
| 5954060 | Coaxial filter cigarette A cigarette having a filter rod which extends longitudinlly and coaxially through the cigarette cord of tobacco. A plurality of filter tags and rings are disposed through the tobacco cord, the quantity of each varied to strengthen or weaken the level of f... | 09/21/1999 |
| 5896860 | Smoking filter A filter for passing tobacco smoke or other gaseous material comprising two layers of material having a plurality of circuitous or serpentine passageways forming pathways through which tobacco smoke travels a distance greater than the length of the filter... | 04/27/1999 |
| 5758669 | Tobacco filters and production process thereof Water disintegratability of a tobacco filter is improved by incorporating a super absorbent resin into a tobacco smoke filter medium in a tobacco filter comprising a main constitutive element of the tobacco smoke filter medium, and a water-soluble polymer... | 06/02/1998 |
| 5718250 | Low gas phase filter for cigarettes A cigarette having an improved carbon-bearing filter. A cigarette is provided with a smokable rod attached to a filter element having a region of carbon-bearing cellulose acetate tow surrounding a substantially impermeable member in the form of a hollow p... | 02/17/1998 |
| 5439011 | Coaxial filter cigarette The coaxial filter cigarette according to the invention contains of a coaxial rod portion and a coaxial filter element. The rod portion contains an inner core of a material glowing or smouldering substantially residue-free, in particular tobacco material,... | 08/08/1995 |
| 5435326 | Controlled delivery smoking article and method A smoking article having a controlled yield of wet particulate matter and a method of making a smoking article with predetermined total and per puff yields of wet particulate matter. The smoking article has a tobacco rod connected to an air ventilated com... | 07/25/1995 |
| 5388596 | Coaxial cigarette The invention relates to a coaxial cigarette comprising a coaxial tobacco rod of a core and a rod periphery which contain different mixtures, the sheaths of the rod core and the rod periphery consisting of combustible material and a filter mouthpiece bein... | 02/14/1995 |
| 5356704 | Tobacco smoke filter Disclosed are articles, such as smoke filters, which contain fibers that have complex geometry in combination with tobacco smoke modifying agents such as flavorants. The fibers are preferably made of a polyester such as poly(ethylene terephthalate) and pr... | 10/18/1994 |
| 5107863 | Cigarette and filter therefor A cigarette filter 12 comprises a rod of filter material having an inner zone 16 of 60% to 90% filter efficiency and an outer zone 18 of 10% to 40% filter efficiency, the inner zone occupying from 30% to 60% of the cross-sectional area of the filter. The ... | 04/28/1992 |
| 4889142 | Smoking article and methods of making the same The invention is for a multi-fold improvement for tobacco, including cigarettes, cigars, pipe smoking and other smoking devices by decreasing the health hazards thereof by: 1. Replacing and/or reducing substantially all of the nitrate in cigarette paper b... | 12/26/1989 |
| 4877040 | Cigarette holder with filter modifier, and related method The specification discloses a cigarette filter modifier and related method in which the pattern of tar and nicotine collection in a conventional cigarette filter is modified by the insertion into the filter of a hollow probe having laterally opening apert... | 10/31/1989 |
| 4702263 | Tobacco smoke filters An insert is interposed between the tobacco containing portion and the filter tip of a cigarette. The insert is formed with a passage connecting the two sections. The passage is surrounded by an annulus with two diametrally opposed orifices between the pa... | 10/27/1987 |
| 4700724 | Smoking-articles mouthpieces-elements A smoking article mouthpiece element comprises a first portion within which a smoke-passage and a ventilation-duct extends from end-to-end of the portion, a downstream end of the duct being spaced from the periphery of the first portion and the wall and t... | 10/20/1987 |
| 4700725 | Adjustable filter cigarette A variable dilution cigarette of the type having relatively rotatable filter segments for controlling dilution is provided with stops. Spaced-apart stop elements are provided on one filter segment and a tongue-like engagement element is provided on the ot... | 10/20/1987 |
| 4699158 | Adjustable filter cigarette with tactile indicator An adjustable filter cigarette is provided with detents for tactile indication of the degree of adjustment. The detents include a protuberance on the surface of the filter mating with cutouts in the tipping paper, or a protuberance on the inside of the ti... | 10/13/1987 |
| 4677995 | Filter cigarette A filter cigarette is provided in which the smoker can select varying levels of one or more flavorants to be added to the smoke stream. A rotatable filter segment having several smoke flow paths, each containing a different flavorant material, cooperates ... | 07/07/1987 |
| 4658838 | Filter cigarette having rotatable adjustment A smoking article in the form of a filter cigarette can have adjustable air dilution provided by alignment of perforations in the paper wrap of the tobacco rod, a band circumscribing the rod, and the tipping paper. The band is attached to the rod and the ... | 04/21/1987 |
| 4649945 | Adjustable air dilution cigarette exhibiting controlled pressure drop A smoking article such as a filter cigarette can have an adjustable delivery air dilution while exhibiting a reduced pressure drop decrease during air dilution thereof. The pressure drop decrease is controlled during various stages of air dilution by posi... | 03/17/1987 |
| 4649941 | Adjustable air dilution cigarette exhibiting controlled pressure drop A smoking article such as a filter cigarette can have an adjustable delivery air dilution while exhibiting a reduced pressure drop decrease during air dilution thereof. The pressure drop decrease is controlled during various stages of air dilution by prov... | 03/17/1987 |
| 4646763 | Adjustable filter cigarette A variable dilution cigarette, of the type having a filter with two relatively rotatable segments having slits in the plug wrapping and the tipping paper which rotate in and out of rotational registry to vary the dilution level, is provided which is insen... | 03/03/1987 |
| 4638820 | Puff control cigarette A smoking article which delivers to a smoker during each puff a flowstream having a higher concentration of smoke during the first portion of the puff and a lower concentration of smoke during the remainder of the puff.... | 01/27/1987 |
| 4621651 | Filter tip for a smoking product A filter tip for a smoking product comprised of a filter rod attached at one end to the smoking product. The filter rod is surrounded by a tip wrapping layer which terminates at a distance from the mouth end of the filter rod. The projecting end of the ro... | 11/11/1986 |
| 4600027 | Cigarette and method of making it A cigarette is provided which comprises a substantially cylindrical tobacco rod, and an integral, axially aligned, substantially cylindrical assembly at the mouth end of the cigarette which preferably includes a wrapped substantially cylindrical filter pl... | 07/15/1986 |
| 4593707 | Variably ventilated filter cigarette A variably ventilatable filter cigarette is provided with a filter body having a plurality of spaced circumferential, peripheral channels covered by a wrapping sheet at least a portion of which is air permeable, the wrapping sheet extending beyond the fil... | 06/10/1986 |
| 4585015 | Cigarette filter A filter for a cigarette has a porous filter rod with a channel extending longitudinally through the filter rod. The end of the filter at the tobacco column of the cigarette includes a partition having an orifice therethrough of a smaller cross-sectional ... | 04/29/1986 |
| 4583560 | Tobacco smoke filter A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke... | 04/22/1986 |
