US3589518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing materials especially for biological filters
Assignee: IRCHA INST NATIONAL DE RECH CH
•
Filing: 1969-03-06
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Granted: 1971-06-29
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Expires: 1989-03-06
Abstract
Abstract A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units arranged juxtaposed in substantially vertical alignment, each of said units comprising a thin walled structure having continuous exchange surfaces throughout the entire height of said filter, said structure having the form of a cylinder comprising an internal cellular structure integral with said cylinder obtained by the extrusion of a plastic material rigid in the cold state for a length equal to the useful height of said filter.
Inventors
- 👤 Georges Brebion
- 👤 Bernard Huriet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:07
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; C02F3/101; B; B01; B01D; B01D46/00; B01D46/02; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material arranged juxtaposed in substantially vertical alignment, each of said units comprising a thin-walled structure having continuous exchange surfaces throughout the entire height of said filter, said structure having the form of a cylinder comprising an internal cellular structure integral with said cylinder, each of said units comprising an interior cylinder connected to the interior wall of said first named cylinder by radial fins.
Claim 2
Dependent Claim
82 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material arranged juxtaposed in substantially vertical alignment, each of said units comprising a thin-walled structure having continuous exchange surfaces throughout the entire height of said filter, said structure having the form of a cylinder comprising an internal cellular structure integral with said cylinder, each of said units comprising an interior cylinder connected to the interior wall of said first named cylinder by radial fins.
Claim 3
Dependent Claim
89 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material arranged juxtaposed in substantially vertical alignment, each of said units comprising a thin-walled structure having continuous exchange surfaces throughout the entire height of said filter, said structure having the form of a cylinder comprising an internal cellular structure integral with said cylinder, each of said units comprising a network having a plurality of partitions extending parallel to the axis of said cylinder and certain of said partitions intersect one another.
Claim 4
Dependent Claim
89 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material arranged juxtaposed in substantially vertical alignment, each of said units comprising a thin-walled structure having continuous exchange surfaces throughout the entire height of said filter, said structure having the form of a cylinder comprising an internal cellular structure integral with said cylinder, each of said units comprising a network having a plurality of partitions extending parallel to the axis of said cylinder and certain of said partitions intersect one another.
Claim 5
Dependent Claim
100 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material interconnected one to another in juxtaposed superposed relation, each of said units comprising an elongate thin-walled, outer tubular member and an inner thin-walled member of geometric configuration spaced centrally inwardly from the outer tubular member, and thin fins extending radially from the interior of the outer tubular member to the inner member to interconnect one with the other in a network, with said inner and outer members extending continuously throughout the length of said tubular member to provide continuous exchange surfaces.
Claim 6
Dependent Claim
100 words
A streaming filter to purify polluted waters by bacteriological aerobic action comprising a plurality of units of plastic material interconnected one to another in juxtaposed superposed relation, each of said units comprising an elongate thin-walled, outer tubular member and an inner thin-walled member of geometric configuration spaced centrally inwardly from the outer tubular member, and thin fins extending radially from the interior of the outer tubular member to the inner member to interconnect one with the other in a network, with said inner and outer members extending continuously throughout the length of said tubular member to provide continuous exchange surfaces.
Claim 7
Dependent Claim
17 words
A streaming filter as claimed in claim 3 in which said units are stacked one on another.
Claim 8
Dependent Claim
16 words
A streaming filter as claimed in claim 4 which includes separator sheets between said stacked units.
Claim 9
Dependent Claim
17 words
A streaming filter as claimed in claim 3 in which said units are arranged in side-by-side relation.
Claim 10
Dependent Claim
22 words
A streaming filter as claimed in claim 6 in which the units are arranged in rows with separator sheets between adjacent rows.
References Cited (Backward Citations)
US2183657A
Cited
US2542681A
Cited
US2739118A
Cited
US3113102A
Cited
GB937597A
Cited
US3329271A
Cited
US3227429A
Cited
US3285587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |