US4428700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for disposing of waste materials
Assignee: ER JOHNSON ASSOCIATES Inc A CORP OF DISTRICT OF COLUMBIA
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Filing: 1981-08-03
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Granted: 1984-01-31
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Expires: 2001-08-03
Abstract
Abstract A method is described for the confinement and isolation of waste materials, especially those that are toxic or otherwise hazardous such as radioactive wastes. The waste material, either contained or uncontained, is emplaced in a underground or surface excavation and encased with backfill or barrier material formed of molten modified sulfur cement or modified sulfur concrete that then cools into a hard, durable, corrosion resistant mass.
Inventors
- 👤 William L. Lennemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:14
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/28; G21F9/34; G21F9/36; B; B09; B09B; B09B1/00; B09B1/008; C; C04; C04B; C04B28/00; C04B28/36; C04B2111/00; C04B2111/00474; C04B2111/00767; C04B2111/00775
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
87 words
A method for the confinement and isolation of toxic waste material which comprises depositing said waste material in an excavation and encasing the waste material with a molten composition poured into said excavation and comprising the reaction product of sulfur and about 2 to 40 weight percent based on the sulfur of a modifier or modifiers selected from the group consisting of dicyclopentadiene, dipentene, vinyltoluene and oligomers of cyclopentadiene and allowing said molten composition to harden to form a solid mass having incorporated therein said waste material.
Claim 2
Independent Claim
87 words
A method for the confinement and isolation of toxic waste material which comprises depositing said waste material in an excavation and encasing the waste material with a molten composition poured into said excavation and comprising the reaction product of sulfur and about 2 to 40 weight percent based on the sulfur of a modifier or modifiers selected from the group consisting of dicyclopentadiene, dipentene, vinyltoluene and oligomers of cyclopentadiene and allowing said molten composition to harden to form a solid mass having incorporated therein said waste material.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein said composition is combined with aggregate prior to encasing with said waste material.
Claim 4
Dependent Claim
35 words
The method of claim 1 wherein said composition further includes up to 15 percent by weight inert material selected from the group consisting of silica flour, mica, and glass, metallic and mineral fibers and frits.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said waste material is radioactive waste.
Claim 6
Dependent Claim
19 words
The method of claim 1 wherein said molten composition contains about 2 to 10 weight percent of said plasticizers.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein said plasticizer is a mixture of an oligomer of cyclopentadiene and up to 75 percent by weight of dicyclopentadiene.
Claim 8
Dependent Claim
18 words
The method of claim 6 wherein said oligomer is a mixture of the trimers through tetramers of cyclopentadiene.
Claim 9
Dependent Claim
29 words
The method of claim 5 wherein said plasticizer is a mixture containing 35 to 50 weight percent of an oligomer of cyclopentadiene and 65 to 50 weight percent dicyclopentadiene.
Claim 10
Dependent Claim
23 words
The method of claim 2 wherein said aggregate is heated to about 150° to 170° C. before being blended with said molten composition.
Claim 11
Dependent Claim
34 words
The method of claim 2 wherein said aggregate is heated to about 175° C. before being blended with said composition in the solid particulate state and the blend maintained at 130° to 150° C.
Claim 12
Dependent Claim
18 words
The method of claim 2 wherein the amount of aggregate is about 50 to 86 percent by weight.
Claim 13
Dependent Claim
29 words
The method of claim 1 wherein said reaction product is in solid, particulate form which is heated to form said molten composition prior to combining with said waste material.
Claim 14
Dependent Claim
15 words
The method of claim 12 wherein said solid particulate reaction product is combined with aggregate.
Claim 15
Independent Claim
22 words
The method of claims 1 or 2 wherein said excavation is provided with a liner prior to depositing therein said waste material.
Claim 16
Independent Claim
27 words
The method of claims 1 or 2 wherein said solid mass encasing the waste material forms a cap over the excavation which is covered with ground material.
Claim 17
Independent Claim
15 words
The method of claims 1 or 2 wherein said mass completely envelops said waste material.
Claim 18
Dependent Claim
11 words
The method of claim 14 wherein said liner comprises said composition.
Claim 19
Independent Claim
12 words
The method of claims 1 or 2 wherein said excavation is subterranian.
Claim 20
Independent Claim
15 words
the method of claims 1 or 2 wherein said excavation is an open, surface excavation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |