US3669648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of high purity metallic titanium
Assignee: Nippon Soda Co Ltd
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Filing: 1969-07-25
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Granted: 1972-06-13
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Expires: 1989-07-25
Abstract
Abstract HIGH PURITY METALLIC TITANIUM SPONGE WHICH HAS AN EXTREMELY LOW HYDROGEN GAS CONTENT PRODUCED BY REDUCING TITANIUM HALIDES WITH A METALLIC ALKALI METAL AT A TEMPERATURE OF BETWEEN 600* C. AND 800* C., DIGESTING AT OVER 900* C. FOR AT LEAST ONE HALF HOUR AND LEACHING WITH AN AQUEOUS SOLUTION.
Inventors
- 👤 Shumzo Homma
- 👤 Minoru Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:53
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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |