Patent US2565351A successfully refreshed from Google Patents.
US2565351A
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US
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Production of defluorinated tricalcium phosphate
Assignee: International Minerals and Chemical Corp
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Filing: 1947-02-28
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Granted: 1951-08-21
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Charles A Butt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:38
CPC Classifications
C; C01; C01B; C01B25/00; C01B25/16; C01B25/26; C01B25/32; C01B25/328; C05; C05B; C05B1/00; C05B1/02; Y; Y10; Y10S; Y10S71/00; Y10S71/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22500E
Cited
GB191113891A
Cited
US1034090A
Cited
US1994070A
Cited
GB453646A
Cited
US2337498A
Cited
US2442969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |