US3786137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ultra-pure compounds corresponding to the formula caal2o4 and mgal2c4
Assignee: OI Glass Inc
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Filing: 1972-04-07
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Granted: 1974-01-15
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Expires: 1992-04-07
Abstract
Abstract DOUBLE METAL ALKOXIDES OF THE FORMULA M(AI(OR)4)2 ARE CONVERTED BY PYROLYSIS, OR HYDROLYSIS AND PYROLYSIS, TO ULTRA-PURE COMPOUNDS CORESSPONDING TO THE FORMULA MAI2O4 WHEREIN M IS MAGNESIUM OR CALCIUM AND R IS AN ALKYL GROUP CONTAINING FROM 1 TO 7 CARBON ATOMS.
Inventors
- 👤 I Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:06
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/069; B; B82; B82Y; B82Y30/00; C01; C01B; C01B13/00; C01B13/14; C01B13/18; C01B13/185; C01F; C01F7/00; C01F7/02; C01F7/16; C01F7/162; C07C; C07C29/00; C07C29/68; C07C29/685; C07C29/70; C07C31/00; C07C31/28; C07C31/30; C07C31/32; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/62; C01P2004/64; C01P2006/00; C01P2006/12
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |