US2531046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defluorination of phosphate rock
Assignee: Coronet Phosphate Co
•
Filing: 1946-04-26
•
Granted: 1950-11-21
•
Expires: 1966-04-26
Abstract
No abstract record available.
Inventors
- 👤 Clinton A Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:41
CPC Classifications
C; C05; C05B; C05B13/00; C05B13/02; A; A23; A23K; A23K20/00; A23K20/20; A23K20/26; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174176A
Cited
US1111490A
Cited
US1396149A
Cited
US1902832A
Cited
US2093176A
Cited
US2061639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |