Patent US2578098A successfully refreshed from Google Patents.
US2578098A
Expired / Lapsed
US
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Aluminum base alloy
Assignee: NL Industries Inc
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Filing: 1944-08-09
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Granted: 1951-12-11
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Expires: 1964-08-09
Abstract
No abstract record available.
Inventors
- 👤 John C Southard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:14
CPC Classifications
C; C22; C22C; C22C21/00; C22C1/00; C22C1/02; C22C1/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451404A
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US2087988A
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US1578044A
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US1912382A
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US2022686A
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US2169193A
Cited
US2252421A
Cited
US2291842A
Cited
US2295706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |