US3837872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making wastes non-polluting and disposable
Assignee: CHEMFIX TECHNOLOGIES Inc 1675 AIRLINE HIGHWAY PO BOX 1572 KENNER LA 70063 A CORP OF DE
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Filing: 1972-01-04
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Granted: 1974-09-24
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Expires: 1992-01-04
Abstract
Abstract An aqueous solution of an alkali metal silicate is mixed with waste material and a silicate setting agent to cause the silicate and setting agent to react with each other. The proportions of the silicate and setting agent are such that the reaction converts the mixture into a consolidated chemically and physically stable solid product that is substantially insoluble in water and in which pollutants are entrapped in the solidified silicate so that the waste material is rendered non-polluting and fit for ultimate disposal.
Inventors
- 👤 J Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:00
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B28/26; B; B09; B09B; B09B3/00; B09B3/20; B09B3/25; B09B3/27; C02; C02F; C02F11/00; C02F11/008; C09; C09K; C09K17/00; C09K17/02; C09K17/12; C09K17/40; C09K17/48; E; E01; E01C; E01C7/00; E01C7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A method according to claim 1, in which said setting agent is Portland cement.
Claim 2
Dependent Claim
28 words
A method according to claim 1, in which the amount of alkali metal silicate and setting agent forms less than about 10 percent by volume of the mixture.
References Cited (Backward Citations)
US1757470A
Cited
US1456303A
Cited
US1470674A
Cited
US1436061A
Cited
US1463123A
Cited
US2016796A
Cited
US2809118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |