US3406056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of and devices for purifying high melting-point metals
Assignee: Centre National de la Recherche Scientifique
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Filing: 1965-11-16
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Granted: 1968-10-15
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Expires: 1985-11-16
Abstract
No abstract record available.
Inventors
- 👤 Albert Philippe
- 👤 Renucci Louis
- 👤 Lehr Pierre
- 👤 Gosse Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:18
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295; C22B9/00; C22B9/006; C22B9/04; C22B9/10; C22B9/16; C22B9/22; C22B9/228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2848315A
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US3091525A
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US3084037A
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US3132024A
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US3107165A
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US3288593A
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US3288594A
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US3330646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |