US3882027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random packing medium
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-04-17
•
Granted: 1975-05-06
•
Expires: 1993-04-17
Abstract
Abstract A packing for biologically treataing waste water in a percolating filter comprising randomly packed extruded hollow cylindrical pieces of an organic polymeric material, the wall of each cylindrical piece being provided, throughout its length, as a plurality of corrugations which lie in planes which are transverse to or oblique to the main axis of the cylindrical piece.
Inventors
- 👤 John Lunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/10; B; B01; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/304; B01J2219/30466; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A PACKING FOR BIOLOGRICALLY TREATING WASTE WATER IN A PERCOLATING FILTER COMPRISING RANDOMLY PACKED EXTRUDED HOLLOW CYLINDRICAL PIECES OF AN ORGANIC POLYMERIC MATERIAL, THE WALL OF EACH CYLINDRICAL PIECE BEING PROVIDED, THROUGHOUT ITS LENGTH, AS A PLURALITY OF CORRUGATIONS WHICH LIE IN PLANES WHICH ARE TRANSVERSE TO OR OBLIQUE TO THE MAIN AXIS OF THE CYLINDRICAL PIECE, EACH OF SAID CORRUGATIONS IN THE WALL OF EACH CYLINDRICAL CORRUGATED PIECE HAVING A DEPTH IN EXCESS OF THE THICKNESS OF THE WALL.
Claim 2
Dependent Claim
80 words
A PACKING FOR BIOLOGRICALLY TREATING WASTE WATER IN A PERCOLATING FILTER COMPRISING RANDOMLY PACKED EXTRUDED HOLLOW CYLINDRICAL PIECES OF AN ORGANIC POLYMERIC MATERIAL, THE WALL OF EACH CYLINDRICAL PIECE BEING PROVIDED, THROUGHOUT ITS LENGTH, AS A PLURALITY OF CORRUGATIONS WHICH LIE IN PLANES WHICH ARE TRANSVERSE TO OR OBLIQUE TO THE MAIN AXIS OF THE CYLINDRICAL PIECE, EACH OF SAID CORRUGATIONS IN THE WALL OF EACH CYLINDRICAL CORRUGATED PIECE HAVING A DEPTH IN EXCESS OF THE THICKNESS OF THE WALL.
Claim 3
Dependent Claim
63 words
A packing as claimed in claim 1 in which the wall of each extruded hollow cylindrical piece is provided, throughout its length, as a plurality of corrugations which lie in planes which are transverse to the main axis of the cylindrical piece, the wall of the hollow cylindrical piece terminating in planes which are transverse to the main axis of the cylindrical piece.
Claim 4
Dependent Claim
63 words
A packing as claimed in claim 1 in which the wall of each extruded hollow cylindrical piece is provided, throughout its length, as a plurality of corrugations which lie in planes which are oblique to the main axis of the cylindrical piece, the wall of the hollow cylindrical piece terminating in planes which are parallel to those planes in which the corrugations lie.
Claim 5
Dependent Claim
32 words
A packing as claimed in claim 3 in which the said planes are inclined at an angle in the range 85* to 65* to the main axis of the hollow cylindrical piece.
Claim 6
Dependent Claim
32 words
A packing as claimed in claim 3 in which the said planes are inclined at an angle in the range 85* to 75* to the main axis of the hollow cylindrical piece.
Claim 7
Dependent Claim
26 words
A packing as claimed in claim 1 in which the wall of each cylindrical piece has a thickness in the range 0.2 mm to 2 mm.
Claim 8
Dependent Claim
27 words
A packing as claimed in claim 1 in which both the diameter and length of each cylindrical piece is in the range 1 cm to 10 cm.
Claim 9
Dependent Claim
31 words
A packing as claimed in claim 1 in which the corrugation provided in the wall of a corrugated piece has a pitch selected in the range 16 mm to 10 mm.
Claim 10
Dependent Claim
31 words
A packing as claimed in claim 1 in which the corrugation provided in the wall of a corrugated piece has a depth selected in the range 1 mm to 20 mm.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |