US3645072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and process of making same
Assignee: Calgon Carbon Corp
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Filing: 1970-01-09
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Granted: 1972-02-29
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Expires: 1990-01-09
Abstract
Abstract A filter is made by bonding and molding a granular activated carbon within a frame of U-shaped channels. The bonded activated carbon body may be reinforced with a wire or other network, and may contain holes or areas of reduced thickness to minimize pressure drop.
Inventors
- 👤 Thomas Miller Clapham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10; C; C01; C01B; C01B32/00; C01B32/30; C01B32/354; C01B32/382
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
83 words
A filter device comprising a rigid, U-shaped channel frame and a filter body within and bonded to the interior of said frame, said filter body consisting essentially of granular activated carbon having a mesh size of from 4 to 50 small particles of a bonding agent for bonding the carbon granules into a unitary shaped mass having open spaces between said granular activated carbon and said bonding agent, said bonding agent occupying no more than one-half the available space between the carbon granules.
Claim 2
Dependent Claim
83 words
A filter device comprising a rigid, U-shaped channel frame and a filter body within and bonded to the interior of said frame, said filter body consisting essentially of granular activated carbon having a mesh size of from 4 to 50 small particles of a bonding agent for bonding the carbon granules into a unitary shaped mass having open spaces between said granular activated carbon and said bonding agent, said bonding agent occupying no more than one-half the available space between the carbon granules.
Claim 3
Dependent Claim
18 words
Device of claim 1 in which the frame is made of the same material as the bonding agent.
Claim 4
Dependent Claim
13 words
Device of claim 1 in which thE bonding agent is a thermoplastic resin.
Claim 5
Dependent Claim
11 words
Device of claim 3 in which the bonding agent is polyethylene.
Claim 6
Dependent Claim
67 words
Method of making a filter device comprising forming a U-shaped channel into a frame, filling the space defined thereby with a mixture consisting essentially of granular activated carbon having a mesh size of from 4 to 50 and small particles of a bonding agent therefor, and bonding the activated carbon granules into a coherent mass having open spaces between said granular activated carbon and said bonding agent.
Claim 7
Dependent Claim
67 words
Method of making a filter device comprising forming a U-shaped channel into a frame, filling the space defined thereby with a mixture consisting essentially of granular activated carbon having a mesh size of from 4 to 50 and small particles of a bonding agent therefor, and bonding the activated carbon granules into a coherent mass having open spaces between said granular activated carbon and said bonding agent.
Claim 8
Dependent Claim
13 words
Method of claim 5 in which the bonding agent is a thermoplastic resin.
Claim 9
Dependent Claim
11 words
Method of claim 6 in which the bonding agent is polyethylene.
Claim 10
Dependent Claim
13 words
Method of claim 5 in which the bonding agent is a thermosetting resin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |