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US2564337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of refractory metals
Assignee: Battelle Development Corp
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Filing: 1948-11-02
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Granted: 1951-08-14
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Expires: 1968-11-02
Abstract
No abstract record available.
Inventors
- 👤 Phillip J Maddex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:27
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1263; C22B34/1268; C22B34/1272
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2121084A
Cited
US2205854A
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US2251906A
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US2369233A
Cited
US2445670A
Cited
US2482127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |