US2473534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnesium oxide
Assignee: Individual
•
Filing: 1942-01-23
•
Granted: 1949-06-21
•
Expires: 1962-01-23
Abstract
No abstract record available.
Inventors
- 👤 Rex B Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:12
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01F5/02; C01F5/06; C01F5/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191421261A
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US1327536A
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GB153500A
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GB217568A
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US2019265A
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GB484136A
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US2216402A
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US2144339A
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US2255607A
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US2288610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |