Patent US3567427A successfully refreshed from Google Patents.
US3567427A
Expired / Lapsed
US
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Chemical disaggregation of rock
Assignee: United States Department of the Interior
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Filing: 1968-11-07
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Granted: 1971-03-02
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Expires: 1988-11-07
Abstract
Abstract ROCK CONTAINING CERTAIN CLAY MINERALS IS CHEMICALLY DISAGGREGATED BY TREATMENT WITH A COMPOUND WHICH CAUSES A RUPTURING OR NEGATION OF THE BONDING BETWEEN UNIT CELLS OF THE CLAY MINERAL. THE CLAY MINERALS MAY BE ILLITE, ILLITETYPE, MIXED LATTICE MINERALS OF THE ILLITE TYPE OR MIXTURE THEREOF. THE TREATMENT COMPOUND MAY BE HYDRAZINE, HYDROGEN PEROXIDE OR MIXTURES THEREOF. THE TREATMENT OF THE CLAY MINERALS MAY BE IN SITU.
Inventors
- 👤 Ray V Huff
- 👤 Larman J Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:25
CPC Classifications
B; B03; B03B; B03B1/00; C; C22; C22B; C22B1/00; C22B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |