US3787558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium hydroxide production
Assignee: STEETLEY Manufacturing Ltd
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Filing: 1970-10-14
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Granted: 1974-01-22
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Expires: 1990-10-14
Abstract
Abstract A PROCESS FOR PRODUCING MAGNESIUM HYDROXIDE HAVING A LOW BORON CONTENT FRO BRINES OR SEA WATER COMPRISING THE STEPS OF PRECIPITATING MAGNESIUM HYDROXIDE FROM THE BRINE OR SEA WATER WITH ALKALI AND SUBSEQUENTLY WASHING THE PRECIPITATED MAGNESIUM HYDROXIDE WITH AQUEOUS ALKALI. THE PRECIPITATION OF THE MAGNESIUM HYDROXIDE MAY BE CARRIED OUT IN TWO STAGES.
Inventors
- 👤 C Briggs
- 👤 T Lythe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:42
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/22
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |