Patent US5304305A successfully refreshed from Google Patents.
US5304305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter for fluids
Assignee: DCV Inc
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Filing: 1993-02-19
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Granted: 1994-04-19
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Expires: 2013-02-19
Abstract
Abstract A filter for fluids includes a pair of layers or multiple layers or pairs of material joined together to form a laminate having a fluid contacting surface. A plurality of spaced pockets is formed between the layers of material in the contacting surface. The layers of material are fluid permeable at the pockets whereby fluid may flow through the laminate at the pockets. The fluid contacting surface is fluid impermeable except for the pockets to require the fluid passing through the laminate to be confined to flowing through the pockets. Filter members are in the pockets for removing any contaminants from the fluid.
Inventors
- 👤 Robert Lehrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:06
CPC Classifications
A; A47; A47J; A47J31/00; A47J31/06; A23; A23F; A23F5/00; A23F5/16; A23F5/18; A23F5/185; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
212 words
A fluid treating member comprising a pair of layers of material joined together to form a laminate having a peripheral edge, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said pockets being spaced from each other and spaced from said edge, said layers of material completely surrounding each of said pockets to define the limits of each of said pockets and to isolate said pockets from said edge and to form closed pockets, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets in paths of flow spaced from said edge, fluid treating media in said pockets for treating the fluid passing through said member, and said paths of flow being confined to first passing through one of said layers of said laminate where said one layer is fluid permeable and then through said pockets in contact with said fluid treating media and then through the other of said layers of said laminate where said other layer is fluid permeable.
Claim 2
Dependent Claim
212 words
A fluid treating member comprising a pair of layers of material joined together to form a laminate having a peripheral edge, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said pockets being spaced from each other and spaced from said edge, said layers of material completely surrounding each of said pockets to define the limits of each of said pockets and to isolate said pockets from said edge and to form closed pockets, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets in paths of flow spaced from said edge, fluid treating media in said pockets for treating the fluid passing through said member, and said paths of flow being confined to first passing through one of said layers of said laminate where said one layer is fluid permeable and then through said pockets in contact with said fluid treating media and then through the other of said layers of said laminate where said other layer is fluid permeable.
Claim 3
Dependent Claim
17 words
The member of claim 1 wherein said layers terminate at the periphery of said fluid contacting surface.
Claim 4
Dependent Claim
47 words
The member of claim 1 wherein said fluid contacting surface is of circular shape, said pockets being arranged in a plurality of sets of pockets, each of said sets being arranged coarcuately in the form of a circle, and said circles of said sets being concentric circles.
Claim 5
Dependent Claim
18 words
The member of claim 3 including a plurality of bend lines between adjacent sets of said concentric circles.
Claim 6
Dependent Claim
41 words
The member of claim 4 wherein said member is of circular shape, and a plurality of concentric annular perforated lines to permit the diameter of said filter to be reduced by removing annular sections of said member at selected perforated lines.
Claim 7
Dependent Claim
19 words
The member of claim 3 wherein said pockets comprise about 50% of the area of said fluid contacting surface.
Claim 8
Dependent Claim
38 words
The member of claim 1 wherein said fluid contacting surface is in grid form with said pair of layers of material being joined together along grid lines, and the open area between said grid lines comprising said pockets.
Claim 9
Dependent Claim
65 words
The member of claim 1 wherein said plurality of spaced pockets comprises a first set of pockets, a second set of pockets mounted to at least a further layer of material joined to said pair of layers of material to form a second set of spaced pockets mounted against said first set of spaced pockets, and filter media being in said second set of pockets.
Claim 10
Dependent Claim
19 words
The member of claim 1 wherein said fluid treating media is filter media for removing contaminants from the fluid.
Claim 11
Dependent Claim
24 words
The member of claim 9 wherein said filter media is selected from at least one material which is an adsorbtive, absorbtive or ion-exchange material.
Claim 12
Dependent Claim
12 words
The member of claim 9 wherein said filter media is activated carbon.
Claim 13
Dependent Claim
19 words
The member of claim 1 wherein said layers are coated with a fluid impermeable coating except at said pockets.
Claim 14
Dependent Claim
39 words
The member of claim 1 wherein said fluid contacting surface is of non-collapsible shape retaining form having sufficient stiffness whereby said fluid contacting surface remains generally horizontal when said member is mounted in a brewing basket or the like.
Claim 15
Dependent Claim
65 words
The member of claim 1 wherein one of said layers terminates at said fluid contacting surface and the other of said layers extends peripherally beyond said fluid contacting surface, an intermediate member between said layers, and said intermediate member having legs which extend outwardly beyond said fluid contacting surface and terminate at the outer edge of said layer which extends beyond said fluid contacting surface.
Claim 16
Dependent Claim
57 words
The member of claim 1, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said member being disposed above said beverage making substances whereby fluid flows through said pockets and into contact with said beverage making substances.
Claim 17
Dependent Claim
59 words
The member of claim 1, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said member being disposed below said support filter whereby fluid flows through said beverage making substance and said support filter before passing through said pockets.
Claim 18
Dependent Claim
141 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, said fluid contacting surface being of non-collapsible shape retaining form having sufficient stiffness whereby said fluid contacting surface remains generally horizontal when said filter is mounted in a brewing basket or the like.
Claim 19
Dependent Claim
141 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, said fluid contacting surface being of non-collapsible shape retaining form having sufficient stiffness whereby said fluid contacting surface remains generally horizontal when said filter is mounted in a brewing basket or the like.
Claim 20
Dependent Claim
26 words
The filter of claim 17 including mounting means extending outwardly beyond said fluid contacting surface for mounting said filter in a brewing basket or the like.
Claim 21
Dependent Claim
24 words
The filter of claim 18 wherein at least one of said layers extends peripherally beyond said fluid contacting surface to comprise said mounting means.
Claim 22
Dependent Claim
35 words
The filter of claim 19 wherein both of said layers extend peripherally beyond said fluid contacting surface, and portions of said layers extending beyond said fluid contacting surface being non-laminated with respect to each other.
Claim 23
Dependent Claim
40 words
The filter of claim 18 including an intermediate member between said layers, said intermediate member being fluid impermeable, a plurality of holes in said intermediate member, and each of said pockets being located at a respective one of said holes.
Claim 24
Dependent Claim
23 words
The filter of claim 21 wherein said intermediate member includes legs extending outwardly beyond said fluid contacting surface to comprise said mounting means.
Claim 25
Dependent Claim
17 words
The filter of claim 21 wherein said layers terminate at the periphery of said fluid contacting surface.
Claim 26
Dependent Claim
19 words
The filter of claim 18 wherein said layers are coated with a fluid impermeable coating except at said pockets.
Claim 27
Dependent Claim
60 words
The filter of claim 18 wherein said layers extend peripherally outwardly beyond said fluid contacting surface, said layers being laminated together in an annular region extending outwardly from said fluid contacting surface, a plurality of pockets located in said annular region, filter media being in each of said pockets, and said annular region being fluid impervious except for said pockets.
Claim 28
Dependent Claim
65 words
The filter of claim 18 wherein one of said layers terminates at said fluid contacting surface and the other of said layers extends peripherally beyond said fluid contacting surface, an intermediate member between said layers, and said intermediate member having legs which extend outwardly beyond said fluid contacting surface and terminate at the outer edge of said layer which extends beyond said fluid contacting surface.
Claim 29
Dependent Claim
122 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and said layers being coated with a fluid impermeable coating except at said pockets.
Claim 30
Dependent Claim
122 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and said layers being coated with a fluid impermeable coating except at said pockets.
Claim 31
Dependent Claim
168 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and one of said layers terminating at said fluid contacting surface and the other of said layers extends peripherally beyond said fluid contacting surface, an intermediate member between said layers, and said intermediate member having legs which extend outwardly beyond said fluid contacting surface and terminate at the outer edge of said layer which extends beyond said fluid contacting surface.
Claim 32
Dependent Claim
168 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and one of said layers terminating at said fluid contacting surface and the other of said layers extends peripherally beyond said fluid contacting surface, an intermediate member between said layers, and said intermediate member having legs which extend outwardly beyond said fluid contacting surface and terminate at the outer edge of said layer which extends beyond said fluid contacting surface.
Claim 33
Dependent Claim
115 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and said filter media being activated carbon.
Claim 34
Dependent Claim
115 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, and said filter media being activated carbon.
Claim 35
Dependent Claim
163 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contact surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, said fluid contacting surface being of circular shape, said pockets being arranged in a plurality of sets of pockets, each of said sets being arranged coarcuately in the form of a circle, and said circles of said sets being concentric circles, and said pockets comprise about 50% of the area of said fluid contacting surface.
Claim 36
Dependent Claim
163 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contact surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, said fluid contacting surface being of circular shape, said pockets being arranged in a plurality of sets of pockets, each of said sets being arranged coarcuately in the form of a circle, and said circles of said sets being concentric circles, and said pockets comprise about 50% of the area of said fluid contacting surface.
Claim 37
Dependent Claim
161 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said fluid filter being disposed above said beverage making substances whereby fluid flows through said pockets and into contact with said beverage making substances.
Claim 38
Dependent Claim
161 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said fluid filter being disposed above said beverage making substances whereby fluid flows through said pockets and into contact with said beverage making substances.
Claim 39
Dependent Claim
163 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said fluid filter being disposed below said support filter whereby fluid flows through said beverage making substance and said support filter before passing through said pockets.
Claim 40
Dependent Claim
163 words
A fluid filter for removing contaminants from a fluid comprising a pair of layers of material joined together to form a laminate, said laminate having a fluid contacting surface, a plurality of spaced pockets between said layers of said material in said fluid contacting surface, said layers of material being fluid permeable at said pockets whereby fluid may flow through said laminate at said pockets, said fluid contacting surface being fluid impermeable except at said pockets to require the fluid passing through said laminate to be confined to flowing through said pockets, filter media in said pockets for removing any contaminants from the fluid passing through said filter, in combination with a brewing basket, said brewing basket having a bottom wall with dispensing means, beverage making substances mounted in a support filter on said bottom wall, and said fluid filter being disposed below said support filter whereby fluid flows through said beverage making substance and said support filter before passing through said pockets.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |