Assignee
AMERICAN FILTRONA CORP
US·51 granted patents·2,702 citations·filing 1975–1999
Top patents by PatentIndex Score
51 records- 0198US5607766APolyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefromAMERICAN FILTRONA CORP·Filed 1995·Granted Mar 4, 1997·148 cites·60 claims
- 0297US5633082APolyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefromAMERICAN FILTRONA CORP·Filed 1996·Granted May 27, 1997·113 cites·16 claims
- 0397US5620641APolyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefromAMERICAN FILTRONA CORP·Filed 1996·Granted Apr 15, 1997·136 cites·17 claims
- 0497US4064791AMethod and apparatus for making tobacco smoke filterAMERICAN FILTRONA CORP·Filed 1976·Granted Dec 27, 1977·70 cites·19 claims
- 0596US5509430ABicomponent fibers and tobacco smoke filters formed therefromAMERICAN FILTRONA CORP·Filed 1993·Granted Apr 23, 1996·108 cites·45 claims
- 0696US4594162APleated filter and method and apparatus for fabricating sameAMERICAN FILTRONA CORP·Filed 1984·Granted Jun 10, 1986·94 cites·44 claims
- 0794US4508525AMethod and apparatus for producing tobacco smoke filter having improved tar/carbon monoxide ratioAMERICAN FILTRONA CORP·Filed 1982·Granted Apr 2, 1985·130 cites·14 claims
- 0893US6103181AMethod and apparatus for spinning a web of mixed fibers, and products produced therefromAMERICAN FILTRONA CORP·Filed 1999·Granted Aug 15, 2000·103 cites·38 claims
- 0993US4357950ATobacco smoke filter having improved tar/carbon monoxide ratioAMERICAN FILTRONA CORP·Filed 1980·Granted Nov 9, 1982·112 cites·35 claims
- 1093US4291711ATobacco smoke filter providing tobacco flavor enrichment, and method for producing sameAMERICAN FILTRONA CORP·Filed 1979·Granted Sep 29, 1981·90 cites·14 claims
- 1193US4286005AInk reservoir element for use in a marking instrument, and method and apparatus for producing sameAMERICAN FILTRONA CORP·Filed 1979·Granted Aug 25, 1981·52 cites·6 claims
- 1292US5911224ABiodegradable polyvinyl alcohol tobacco smoke filters, tobacco smoke products incorporating such filters, and methods and apparatus for making sameAMERICAN FILTRONA CORP·Filed 1997·Granted Jun 15, 1999·179 cites·62 claims
- 1392US4940470ASingle field ionizing electrically stimulated filterAMERICAN FILTRONA CORP·Filed 1988·Granted Jul 10, 1990·123 cites·31 claims
- 1492US4281671AProduction of tobacco smoke filtersAMERICAN FILTRONA CORP·Filed 1979·Granted Aug 4, 1981·317 cites·7 claims
- 1590US4853005AElectrically stimulated filter method and apparatusAMERICAN FILTRONA CORP·Filed 1987·Granted Aug 1, 1989·73 cites·24 claims
- 1690US4075936AMethod and apparatus for making tobacco smoke filterAMERICAN FILTRONA CORP·Filed 1976·Granted Feb 28, 1978·63 cites·15 claims
- 1789US4507107AFilter manufacturing techniqueAMERICAN FILTRONA CORP·Filed 1981·Granted Mar 26, 1985·33 cites·37 claims
- 1889US4390031ATobacco filterAMERICAN FILTRONA CORP·Filed 1981·Granted Jun 28, 1983·33 cites·9 claims
- 1989US4355995ATobacco smoke filter providing tobacco flavor enrichment, and method for producing sameAMERICAN FILTRONA CORP·Filed 1981·Granted Oct 26, 1982·81 cites·11 claims
- 2088US4046063AMethod and apparatus for making tobacco smoke filterAMERICAN FILTRONA CORP·Filed 1976·Granted Sep 6, 1977·62 cites·8 claims
- 2185US4022222ATobacco smoke filterAMERICAN FILTRONA CORP·Filed 1975·Granted May 10, 1977·51 cites·9 claims
- 2283US4354889AInk reservoir element for use in a marking instrument, and method and apparatus for producing sameAMERICAN FILTRONA CORP·Filed 1981·Granted Oct 19, 1982·36 cites·10 claims
- 2382US4579637AMethod and apparatus for separating impurities from low conductivity liquidsAMERICAN FILTRONA CORP·Filed 1984·Granted Apr 1, 1986·43 cites·17 claims
- 2479US4637409ATobacco smoke filter and method and apparatus for making sameAMERICAN FILTRONA CORP·Filed 1981·Granted Jan 20, 1987·44 cites·39 claims
- 2577US4869275AUltra-high filtration filterAMERICAN FILTRONA CORP·Filed 1987·Granted Sep 26, 1989·48 cites·18 claims
- 2676US4026306ATobacco smoke filterAMERICAN FILTRONA CORP·Filed 1975·Granted May 31, 1977·22 cites·7 claims
- 2774US4022221ATobacco smoke filterAMERICAN FILTRONA CORP·Filed 1975·Granted May 10, 1977·27 cites·15 claims
- 2871US3967383ACircumference gauge and recording methodAMERICAN FILTRONA CORP·Filed 1975·Granted Jul 6, 1976·20 cites·25 claims
- 2970US4729808AInk reservoir having continuous random sliver with stretch yarnAMERICAN FILTRONA CORP·Filed 1986·Granted Mar 8, 1988·24 cites·8 claims
- 3070US4391716APreferential wicking systemAMERICAN FILTRONA CORP·Filed 1981·Granted Jul 5, 1983·30 cites·24 claims
- 3170US4198853APorosity measurementAMERICAN FILTRONA CORP·Filed 1978·Granted Apr 22, 1980·22 cites·17 claims
- 3266US4675064ASmoke filter having extended film overwrap and method and apparatus for fabricating sameAMERICAN FILTRONA CORP·Filed 1985·Granted Jun 23, 1987·31 cites·1 claims
- 3362US3994306ATobacco smoke filterAMERICAN FILTRONA CORP·Filed 1975·Granted Nov 30, 1976·19 cites·6 claims
- 3459US4784632ATobacco smoke filter and method and apparatus for making sameAMERICAN FILTRONA CORP·Filed 1986·Granted Nov 15, 1988·23 cites·6 claims
- 3559US4423744ATobacco smoke filter contoured to provide undiluted air flow and method and apparatus for manufacturing sameAMERICAN FILTRONA CORP·Filed 1981·Granted Jan 3, 1984·19 cites·22 claims
- 3659US4059043AMethod and apparatus for making tobacco smoke filtersAMERICAN FILTRONA CORP·Filed 1976·Granted Nov 22, 1977·17 cites·8 claims
- 3753US4747814AFiber separatorAMERICAN FILTRONA CORP·Filed 1986·Granted May 31, 1988·17 cites·4 claims
- 3850US6026819ATobacco smoke filter incorporating sheath-core bicomponent fibers and tobacco smoke product made therefromAMERICAN FILTRONA CORP·Filed 1998·Granted Feb 22, 2000·8 cites·21 claims
- 3950US4614199ASmoke filter having extended film overwrap and method and apparatus for fabricating sameAMERICAN FILTRONA CORP·Filed 1982·Granted Sep 30, 1986·12 cites·9 claims
- 4046US4822193AInk reservoir having continuous random sliver with stretch yarnAMERICAN FILTRONA CORP·Filed 1987·Granted Apr 18, 1989·5 cites·1 claims
- 4145US4552158AFree air dilution smoke filter and method and apparatus for fabricating sameAMERICAN FILTRONA CORP·Filed 1984·Granted Nov 12, 1985·9 cites·3 claims
- 4244US4216706AManufacture of smoking articlesAMERICAN FILTRONA CORP·Filed 1978·Granted Aug 12, 1980·11 cites·8 claims
- 4339US4481959AFiltering meansAMERICAN FILTRONA CORP·Filed 1982·Granted Nov 13, 1984·9 cites·6 claims
- 4438US5195543ABalanced flow tobacco smoke filterAMERICAN FILTRONA CORP·Filed 1991·Granted Mar 23, 1993·7 cites·16 claims
- 4537US4007668ACrimper assemblyAMERICAN FILTRONA CORP·Filed 1975·Granted Feb 15, 1977·5 cites·11 claims
- 4636US4161823ACircumference measuring gaugeAMERICAN FILTRONA CORP·Filed 1978·Granted Jul 24, 1979·4 cites·9 claims
- 4735US4024001ASmoke filter process and apparatusAMERICAN FILTRONA CORP·Filed 1975·Granted May 17, 1977·8 cites·12 claims
- 4833US4499912AFree air dilution smoke filter and method and apparatus for fabricating sameAMERICAN FILTRONA CORP·Filed 1981·Granted Feb 19, 1985·2 cites·14 claims
- 4930US4055108ACrimper assemblyAMERICAN FILTRONA CORP·Filed 1976·Granted Oct 25, 1977·3 cites·4 claims
- 5028US5632286ACrimped elements for cigarettes and the like and methods and apparatus for making sameAMERICAN FILTRONA CORP·Filed 1994·Granted May 27, 1997·5 cites·56 claims
Showing the top 50 of 51 patent records by PatentIndex Score.
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