US3750887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter media for liquid wastes treatment and method of forming the same
Assignee: Del Pak Media Corp
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Filing: 1971-09-15
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Granted: 1973-08-07
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Expires: 1991-09-15
Abstract
Abstract A pallet-like unit for use with a plurality of similarly formed units in the formation of a biological filter media for the treatment of liquid waste and the array of such units is disclosed. The unit includes a plurality of elongated growth supporting surfaces, preferably redwood laths, which are secured to supporting members positioned inwardly of the periphery of the unit and preferably in mutually perpendicular relation to form a self supporting stackable structure. The positioning of the supporting members enables stacking of the units in vertically superimposed horizontally extending layers with selected layers being horizontally staggered or displaced so that units overlap each other to even out dimensional variances and provide greater stability in the filter array.
Inventors
- 👤 E Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:02
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; C02F3/101; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
A filter media for the treatment of liquid waste, said media including a plurality of pallet-like units stacked in an array comprised of vertically superimposed horizontally extending layers each having a plurality of units positioned in side-byside relation therein, each of said units including a plurality of horizontally extending surfaces secured to a supporting structure to form a self-supporting unit, the improvement comprising: an array having units formed with a supporting structure having at least two mutually perpendicularly oriented and extending supporting members with said surfaces being secured thereto; and an array having a plurality of said horizontally extending layers positioned with the units in one of said plurality of layers being horizontally displaced relative to a vertically adjacent layer of said plurality of units, with individual units in said horizontally displaced layer over-lapping a substantial portion of at least two units in said next vertically adjacent layer.
Claim 2
Dependent Claim
148 words
A filter media for the treatment of liquid waste, said media including a plurality of pallet-like units stacked in an array comprised of vertically superimposed horizontally extending layers each having a plurality of units positioned in side-byside relation therein, each of said units including a plurality of horizontally extending surfaces secured to a supporting structure to form a self-supporting unit, the improvement comprising: an array having units formed with a supporting structure having at least two mutually perpendicularly oriented and extending supporting members with said surfaces being secured thereto; and an array having a plurality of said horizontally extending layers positioned with the units in one of said plurality of layers being horizontally displaced relative to a vertically adjacent layer of said plurality of units, with individual units in said horizontally displaced layer over-lapping a substantial portion of at least two units in said next vertically adjacent layer.
Claim 3
Dependent Claim
66 words
A filter media array as defined in claim 1 wherein, said surfaces in said units are provided by a plurality of laths and a first of said supporting members is mounted in substantially perpendicular relation to said laths, and a second of said supporting members is mounted in substantially perpendicular relation to said first supporting member and substantially parallel to the longitudinal axes of said laths.
Claim 4
Dependent Claim
79 words
A filter media array as defined in claim 2 wherein, said supporting members include an additional first supporting member mounted in relative superimposed relation to said laths and in laterally spaced generally parallel relation to said first supporting member to intersect each of said laths, said additional first supporting member being mounted intermediately of the ends of said laths and intersecting and being secured to said second supporting member, said laths being secured to said additional first supporting member.
Claim 5
Dependent Claim
151 words
A filter media array as defined in claim 2 wherein, said array is generally rectangular having a pair of first sides and a pair of second sides, said laths and said second supporting member being positioned to extend parallel to said second sides; and a plurality of first supporting members each being mounted in relative superimposed and substantially perpendicular relation to said laths and being positioned in relative laterally spaced generally parallel relation to each other and said first sides, a first of said first supporting members being positioned laterally of one of said first Sides a distance equal to about 1/2 n times the length of said laths and each subsequent of said first supporting members being positioned from the laterally adjacent first supporting member by a distance equal to about 1/n times the length of said laths, where n equals the number of said plurality of first support members.
Claim 6
Dependent Claim
50 words
A filter media array as defined in claim 4 wherein, said second supporting member is positioned laterally inwardly of one of said second sides a distance equal to about one quarter of the length of said first sides, and extends beyond said unit for securement to a laterally adjacent unit.
Claim 7
Dependent Claim
104 words
A filter media array as defined in claim 4, and a plurality of second supporting members mounted in relative superimposed and substantially parallel relation to said laths and to each other, a first of said second supporting members being positioned laterally of one of said second sides a distance equal to about 1/2 m times the length of said first sides and each subsequent of said second supporting members being positioned from the laterally adjacent second supporting member by a distance equal to about 1/m times the length of said first sides, where m equals the number of said plurality of second supporting members.
Claim 8
Dependent Claim
129 words
A filter media array as defined in claim 1, wherein, said horizontally extending surfaces are provided by a plurality of lath members positioned in parallel relatively spaced relation and secured to at least two generally parallel relatively spaced supporting members running perpendicularly to said lath members intermediately of the ends thereof, said supporting structure further including a supporting member oriented perpendicularly to said first named supporting members at a position intermediate the ends of said unit; and wherein said units in said horizontally displaced layers are positioned to overlap units in said next vertically adjacent layer with the members comprising said supporting structure in said units in said displaced layer being substantially in a vertical alignment with said supporting structure in said units in said next vertically adjacent layer.
Claim 9
Dependent Claim
46 words
Afilter media array as defined in claim 7, wherein, alternate layers of said array are horizontally displaced, and said units are generally rectangular and units in said horizontally displaced overlap a substantial portion of units in the next vertically adjacent layer in two mutually perpendicular directions.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |