US2789897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium reduction process for production of uranium
Assignee: Individual
•
Filing: 1946-07-19
•
Granted: 1957-04-23
•
Expires: 1966-07-19
Abstract
No abstract record available.
Inventors
- 👤 Charles B Sawyer
- 👤 Bengt R F Kjellgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:05
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1659209A
Cited
US1415516A
Cited
US1437984A
Cited
US1602542A
Cited
GB230865A
Cited
US2446780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |