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Patent US2550684A successfully refreshed from Google Patents.
US2550684A
Expired / Lapsed
US
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Apparatus for production of volatilizable metals
Assignee: Individual
•
Filing: 1948-04-24
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Granted: 1951-05-01
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Expires: 1968-04-24
Abstract
No abstract record available.
Inventors
- 👤 Fouquet Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/16; C22B26/00; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922274A
Cited
US2112643A
Cited
US2337042A
Cited
US2362718A
Cited
FR907136A
Cited
US2386189A
Cited
US2433615A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |