US4775494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hazardous and radioactive liquid waste disposal method
Assignee: Individual
•
Filing: 1987-05-11
•
Granted: 1988-10-04
•
Expires: 2007-05-11
Abstract
Abstract An improved method of disposing of radioactive or hazardous liquids comprises placing the liquids in a container and adding a sodium montmorillonite over intervals until the composition is substantially solid in the container.
Inventors
- 👤 Farrell D. Rowsell
- 👤 James W. Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:24
CPC Classifications
G; G21; G21F; G21F9/00; G21F9/04; G21F9/06; G21F9/16; G21F9/162; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/909
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
An improved method of solidifying a radioactive or hazardous liquid comprising placing said liquid in a container and adding only sodium montmorillonite to said liquid in a ratio of sodium montmorillonite:liquid of between about 3:1 and 1:7, respectively, until the composition comprises an unpourable, free standing solid.
Claim 2
Dependent Claim
47 words
An improved method of solidifying a radioactive or hazardous liquid comprising placing said liquid in a container and adding only sodium montmorillonite to said liquid in a ratio of sodium montmorillonite:liquid of between about 3:1 and 1:7, respectively, until the composition comprises an unpourable, free standing solid.
Claim 3
Independent Claim
67 words
A method of solidifying a radioactive or hazardous liquid comprising at least about 95% water by adding only sodium montmorillonite having a major portion of particles between about 3/8 inch and 20 mesh thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and about 1:7, respectively, in fractions with at least a few minutes interval between fractions, until the composition comprises an unpourable, free standing solid.
Claim 4
Independent Claim
67 words
A method of solidifying a radioactive or hazardous liquid comprising at least about 95% water by adding only sodium montmorillonite having a major portion of particles between about 3/8 inch and 20 mesh thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and about 1:7, respectively, in fractions with at least a few minutes interval between fractions, until the composition comprises an unpourable, free standing solid.
Claim 5
Dependent Claim
21 words
The method of claim 2 wherein each of said fractions is between about 10 and 50% of the total amount added.
Claim 6
Dependent Claim
34 words
The method of claim 2 wherein each of said fractions is between about 1/3 and 1/4 of the total amount added and wherein the intervals between fraction additions is at least about 10 minutes.
Claim 7
Dependent Claim
55 words
The method of claim 2 comprising placing between about 40 and 50 gallons of said liquid in a 55 gallon drum, and adding between about 150 and about 175 pounds of sodium montmorillonite to said liquid in fractions of between about 40 and about 55 pounds with at least about 10 minute intervals between fractions.
Claim 8
Independent Claim
56 words
A method of solidifying a radioactive or hazardous liquid comprising at least about 5% hydrocarbon by adding only sodium montmorillonite having a major portion of particles of about 200 mesh or smaller thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and 3:1, respectively, with stirring, until the composition comprises an unpourable, free standing solid.
Claim 9
Independent Claim
56 words
A method of solidifying a radioactive or hazardous liquid comprising at least about 5% hydrocarbon by adding only sodium montmorillonite having a major portion of particles of about 200 mesh or smaller thereto in a sodium montmorillonite:liquid ratio of between about 1:2 and 3:1, respectively, with stirring, until the composition comprises an unpourable, free standing solid.
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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) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |