Patent US3949236A successfully refreshed from Google Patents.
Patent US2415074A successfully refreshed from Google Patents.
US2415074A
Expired / Lapsed
US
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Manufacture of crystalline magnesium hydroxide
Assignee: Imperial Chemical Industries Ltd
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Filing: 1944-03-17
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Granted: 1947-02-04
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Expires: 1964-03-17
Abstract
No abstract record available.
Inventors
- 👤 Leslie M Clark
- 👤 John G Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:55
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/22; C01P; C01P2004/00; C01P2004/50; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2224708A
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US1815735A
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US2041047A
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US2089339A
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US2045301A
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GB482339A
Cited
US2191560A
Cited
US2208185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-03 | 1950-08-05 | 1951-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-03 | 1954-08-05 | 1955-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-03 | 1958-08-05 | 1959-02-04 | $7700.00 | Window Closed / Lapsed |