US4194855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for storing waste materials and their combustion residues in a manner harmless to underground water
Assignee: Individual
•
Filing: 1978-03-27
•
Granted: 1980-03-25
•
Expires: 1998-03-27
Abstract
Abstract An earth pit is prepared for the storage of waste materials by lining the bottom of the pit with a layer of finely-ground loose material followed by a synthetic plastic sheet resistant to humus, roots and tearing followed by a second layer of finely-ground loose material. The layers of loose material equal the pressure on the opposite sides of the synthetic plastic sheet. A number of sheets may be solution-welded together for a large pit.
Inventors
- 👤 Hanns Egger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:38
CPC Classifications
E; E02; E02D; E02D31/00; E02D31/002; E02D31/004; Y; Y10; Y10S; Y10S210/00; Y10S210/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
132 words
A method for storing waste materials and their combustion residues in a manner harmless to underground water, comprising the steps of: digging a pit providing a bottom; laying a first pressure-equalising layer of finely ground loose material on the bottom of the pit such that the layer covers the bottom of the pit, placing a humus-resistant, root-resistant and tear-resistant solution-weldable synthetic plastic sheet on said first layer, laying a second pressure-equalising layer of finely ground loose material on top of the synthetic plastic sheet, the layers being formed from refuse slag and/or industrial slag and having a thickness of between about 150 to 500 MM, the loose material having been ground dust-fine before being laid in said layers, and material to be stored is then filled into the pit onto said layers.
Claim 2
Independent Claim
132 words
A method for storing waste materials and their combustion residues in a manner harmless to underground water, comprising the steps of: digging a pit providing a bottom; laying a first pressure-equalising layer of finely ground loose material on the bottom of the pit such that the layer covers the bottom of the pit, placing a humus-resistant, root-resistant and tear-resistant solution-weldable synthetic plastic sheet on said first layer, laying a second pressure-equalising layer of finely ground loose material on top of the synthetic plastic sheet, the layers being formed from refuse slag and/or industrial slag and having a thickness of between about 150 to 500 MM, the loose material having been ground dust-fine before being laid in said layers, and material to be stored is then filled into the pit onto said layers.
Claim 3
Dependent Claim
15 words
The method of claim 1, wherein the synthetic plastic sheet is resistant to chemical attack.
Claim 4
Dependent Claim
21 words
The method of claim 1, wherein the synthetic plastic sheet is prepared from a plurality of individual sheets by solution welding.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein several horizontal storage layers are disposed above each other.
Claim 6
Dependent Claim
20 words
The method of claim 1, wherein the layer thickness of the pressure equalising layers is about 200 to 500 mm.
Claim 7
Dependent Claim
32 words
The method of claim 1, wherein the bottom of the pit, which may be levelled, is at least partially foamed over with closed cell foam plastics before said first layer is laid.
References Cited (Backward Citations)
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Cited
US3461673A
Cited
US3586624A
Cited
US3782299A
Cited
US3705851A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |