US3594332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical particles of hydroxide and method
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1968-07-02
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Granted: 1971-07-20
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Expires: 1988-07-02
Abstract
Abstract THE PREPARATION OF SPHERICAL PARTICLES OF OXIDES CHARACTERIZED BY HIGH MECHANICAL SOLIDITY IN WHICH AT LEAST TWO OXIDES ARE PRESENT IN A CONCENTRATION OF 2 MOLES PER LITER AND IN THE FORM OF A SOL OR PEPTIZED SUSPENSION, MIXED AND FLOCCULATED BY ADDITION THERETO OF A BASE TO RAISE THE PH OF THE MIXTURE, AFTER WHICH THE FLOCCULATED MIXTURE IS WORKED TO FORM A SUSPENSION OF SPHERICAL PARTICLES WHICH ARE WASHED, DRIED AND, IF DESIRED, CALCINED AT ELEVATED TEMPERATURES.
Inventors
- 👤 Max Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/04; B01J2/00; B01J2/02; B01J2/06; B01J2/08; B01J20/00; B01J20/02; B01J20/10; B01J21/00; B01J21/12; B01J21/14; C; C01; C01B; C01B33/00; C01B33/113
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |