Patent US4277810A successfully refreshed from Google Patents.
US3944403A
Expired / Lapsed
US
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Adsorptive devices
Assignee: Siebe Gorman and Co Ltd
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Filing: 1974-02-25
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Granted: 1976-03-16
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Expires: 1994-02-25
Abstract
Abstract An adsorptive device having at least one composite adsorptive element through which gas can pass comprising a bed of granular adsorptive carbon and a bed of fibrous adsorptive carbon.
Inventors
- 👤 Keith Simpson
- 👤 Frederick Arthur Pomroy Maggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:31
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0415; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/93; B01D2259/00; B01D2259/45; B01D2259/4541; Y; Y10; Y10S; Y10S55/00; Y10S55/33; Y10S55/35
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
An adsorptive device comprising: a. a housing having a gas inlet and a gas outlet; and b. at least one composite adsorptive element, said element being supported in said housing in the gas path through said housing from said inlet to said outlet, said element comprising a bed of adsorptive carbon in granular form, said granular carbon bed having a depth of at least 4 centimeters, and a bed of adsorptive carbon in fibrous form comprising at least three layers of charcoal cloth, said fibrous carbon bed being situated downstream of said granular carbon bed.
Claim 2
Dependent Claim
95 words
An adsorptive device comprising: a. a housing having a gas inlet and a gas outlet; and b. at least one composite adsorptive element, said element being supported in said housing in the gas path through said housing from said inlet to said outlet, said element comprising a bed of adsorptive carbon in granular form, said granular carbon bed having a depth of at least 4 centimeters, and a bed of adsorptive carbon in fibrous form comprising at least three layers of charcoal cloth, said fibrous carbon bed being situated downstream of said granular carbon bed.
Claim 3
Dependent Claim
21 words
An adsorptive device according to claim 1, wherein said bed of fibrous adsorptive carbon comprises at least five layers of cloth.
Claim 4
Dependent Claim
35 words
An adsorptive device according to claim 1, wherein said charcoal cloth has a heat of wetting of approximately 8.0 calories per gram using silicon oil at a viscosity of 2 centipoise as the wetting liquid.
Claim 5
Dependent Claim
27 words
An adsorptive device according to claim 1, wherein said granular bed is composed of granules of size within the range of from -8 to +12 mesh (B.S.S.).
Claim 6
Dependent Claim
44 words
An adsorptive device according to claim 1, wherein said composite adsorptive element comprises two perforated discs and spacer means between the two discs maintaining the discs at a fixed distance from each other, said fibrous adsorptive carbon bed being contained between said two discs.
Claim 7
Dependent Claim
20 words
An adsorptive device according to claim 1, which comprises a particulate filter situated upstream of said granular adsorptive carbon bed.
Claim 8
Dependent Claim
16 words
An adsorptive device according to claim 6, wherein said particulate filter is a glass-fibre paper filter.
Claim 9
Dependent Claim
20 words
An adsorptive device according to claim 1, wherein non-return valve means is provided downstream of said fibrous adsorptive carbon bed.
References Cited (Backward Citations)
US2922488A
Cited
US3406501A
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GB1301101A
Cited
US3593499A
Cited
US3675398A
Cited
US3744976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |