US3662765A
Expired / Lapsed
US
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Smoke filter
Assignee: General Electric Co
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Filing: 1970-11-27
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Granted: 1972-05-16
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Expires: 1990-11-27
Abstract
Abstract A porous filter is provided which is effective for removing undesirable materials such as particulate matter from smoke, including tobacco smoke, comprising an organopolysiloxane disposed in the conduit through which the smoke is forced to pass, the said filter being formed of an organopolysiloxane of the formula: (R)a(R'')b SiO (4-a- b)/2 Where R is a monovalent polar organic radical selected from the group consisting of cyanalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyl, uriedoalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5 inclusive, and the sum of a+ b has a value equal to 1 to 3, inclusive, mixed with up to about 300 parts of filler. The filter can be used in combination with a cigarette, or as an anti-air pollution device. The organopolysiloxane can also be carried on a porous substrate such as polyurethane or polyvinyl chloride.
Inventors
- 👤 Robert F Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:53
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/022; F01N3/0228; A; A24; A24D; A24D3/00; A24D3/06; A24D3/16; A24D3/166; B; B01; B01D; B01D39/00; B01D39/02; B01D39/04; B01D39/14; B01D39/16; B01D39/1669; B01D39/1676; F01N2330/00; F01N2330/20; F01N2370/00; F01N2370/22; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
153 words
A filter for filtering out particulate matter from combustion fumes or smoke passing through a conduit comprising a porous container having a cross-section at least the size of the diameter of said conduit with said container being located at the outlet of said conduit so that the smoke will flow through said container and a filter foam material filling said container which filter foam material is formed from an organopolysiloxane of the formula, (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl, uriedoalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive, mixed with up to about 300 parts of filler and a process aid.
Claim 2
Dependent Claim
130 words
A filter for filtering out particulate matter from combustion fumes or smoke passing through a conduit comprising a porous foam substrate having a cross-section at least the size of the diameter of said conduit with said substrate being located at the outlet of said conduit so that the smoke will flow through said substrate which substrate is treated with an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl, and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive.
Claim 3
Dependent Claim
108 words
A filter for filtering out particulate matter from tobacco smoke comprising a cylindrical tube having about the diameter of a cigarette filled with small particles formed from an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl, uriedoalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive, mixed with up to about 300 parts of filler.
Claim 4
Dependent Claim
116 words
A filter for filtering out particulate matter from tobacco smoke comprising a cylindrical tube having about the diameter of a cigarette filled with a cylindrical rod of foam material formed from an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl, uriedoalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive, mixed with up to about 300 parts of filler and a process aid.
Claim 5
Dependent Claim
108 words
A filter for filtering out particulate matter from tobacco smoke comprising a cylindrical tube having about the diameter of a cigarette filled with a cylindrical rod constructed from a porous foam substrate which rod is treated with an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive.
Claim 6
Dependent Claim
131 words
A process for removing particulate matter from tobacco smoke comprising placing adjacent an amount of tobacco particles having two ends such that one end is burning, a porous filter wiTh two ends which contains therein an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value equal to 1 to 3, inclusive, and applying suctions to one end of said filter which is away from said tobacco so as to draw the tobacco smoke through said filter.
Claim 7
Dependent Claim
31 words
The process of claim 7 wherein the filter comprises a cylindrical tube which is filled with particles formed from a mixture of said organopolysiloxane and up to about 300 parts filler.
Claim 8
Dependent Claim
34 words
The process of claim 7 wherein the filter comprises a cylindrical tube which is filled with a porous foam constructed from said organopolysiloxane, up to about 300 parts of filler and a process aid.
Claim 9
Dependent Claim
16 words
The process of claim 8 wherein said organopolysiloxane consists essentially of beta-cyanoethylsiloxy units and dimethylsiloxy units.
Claim 10
Dependent Claim
46 words
The process of claim 8 wherein said particles are formed from a blend of 100 parts of beta-cyanoethylsiloxane composed of about 50 mole per cent of chemically combined beta-cyanoethyl, methylsiloxy units and about 50 mole per cent of dimethylsiloxy units and 75 parts of silica filler.
Claim 11
Dependent Claim
39 words
The process of claim 7 wherein the filter comprises a cylindrical tube which is filled with a rod constructed from a porous substrate selected from the group consisting of polyurethane and polyvinylchloride and which is treated with said organopolysiloxane.
Claim 12
Dependent Claim
93 words
A process for removing particulate matter from smoke comprising placing in the path of said smoke a filter which contains therein an organopolysiloxane of the formula: (R)a(R'')bSiO(4 a b)/2 where R is a monovalent polar organic radical selected from the group consisting of cyanoalkyl, fluoroalkyl, nitroalkyl, arylsulfonylalkyl, carbamylalkyl, carbalkoxyalkyl, and nitroaryl, R'' is a monovalent hydrocarbon radical, a has a value equal to 0.1 to 3, inclusive, b has a value of 0 to 2.5, inclusive, and the sum of a + b has a value of equal to 1 to 3, inclusive.
Claim 13
Dependent Claim
32 words
The process of claim 13 wherein the filter comprises a cylindrical tube which is filled with particles formed from a mixture of said organopolysiloxane and up to about 300 parts of filler.
Claim 14
Dependent Claim
34 words
The process of claim 13 wherein the filter comprises a cylindrical tube which is filled with a porous foam constructed from said organopolysiloxane, up to about 300 parts of filler and a process aid.
Claim 15
Dependent Claim
16 words
The process of claim 14 wherein said organopolysiloxane consists essentially of beta-cyanoethylsiloxy units and dimethylsiloxy units.
Claim 16
Dependent Claim
46 words
The process of claim 14 wherein said particles are formed from a blend of 100 parts of beta-cyanoethylsiloxane composed of about 50 mole per cent of chemically combined beta-cyanoethyl, methylsiloxy units and about 50 mole per cent of dimethylsiloxy units and 35 parts of silica filler.
Claim 17
Dependent Claim
40 words
The process of claim 13 wherein the filter comprises a cylindrical tube which is filled with a rod constructed from a porous substrate selected from the group consisting of polyurethane and polyvinylchloride and which substrate is treated with said organopolysiloxane.
References Cited (Backward Citations)
DE1065312B
Cited
US3050492A
Cited
GB721162A
Cited
US3185663A
Cited
GB753203A
Cited
US3026278A
Cited
GB908185A
Cited
US3070555A
Cited
US3032445A
Cited
US3360538A
Cited
US3379659A
Cited
US3347245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |