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Patent US2465264A successfully refreshed from Google Patents.
US2465264A
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US
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Production of magnesia
Assignee: Harbison Walker Refractories Co
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Filing: 1944-11-22
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Granted: 1949-03-22
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Expires: 1964-11-22
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:42
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US867958A
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US1739302A
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US2124002A
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US2224780A
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US2233641A
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US2227534A
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US2276245A
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US2233619A
Cited
US2255422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-21 | 1952-09-20 | 1953-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-21 | 1956-09-20 | 1957-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-21 | 1960-09-20 | 1961-03-22 | $7700.00 | Window Closed / Lapsed |