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US1323735A
Expired / Lapsed
US
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Art of recovering thorium prom monazite sands
Assignee: —
•
Filing: —
•
Granted: 1919-12-02
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Expires: 1936-12-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:08
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0221; C22B60/0226; C22B60/0234
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) | 1922-12-01 | 1923-06-02 | 1923-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-12-01 | 1927-06-02 | 1927-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-12-01 | 1931-06-02 | 1931-12-02 | $7700.00 | Window Closed / Lapsed |