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US3539306A
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Process for the preparation of hydrotalcite
Assignee: Kyowa Chemical Industry Co Ltd
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Filing: 1967-07-21
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Granted: 1970-11-10
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Expires: 1987-07-21
Abstract
Abstract A synthetic hydrotalcite having the composition expressed by the formula; A1203.6MgO.CO2.12H20 and having substantially the following diffraction X-ray diffraction analysis: d.A. 7.75, 3.89, 2.59, 2.30, 1.96, 1.53 and 1.
Inventors
- 👤 Teruhiko Kumura
- 👤 Norio Imataki
- 👤 Katuyuki Hasui
- 👤 Takeo Inoue
- 👤 Kimiaki Yasutomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:45
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/78; C01F7/784; C01F7/785; C01P; C01P2002/00; C01P2002/20; C01P2002/22; C01P2002/70; C01P2002/72
Claims Analysis
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References Cited (Backward Citations)
US2958626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |