US3512927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically treating phosphorite and obtaining separate products of fluorine and of phosphorus
Assignee: Individual
•
Filing: 1965-07-26
•
Granted: 1970-05-19
•
Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Anson G Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:34
CPC Classifications
C; C05; C05B; C05B11/00; C05B11/04; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/22; C01F; C01F7/00; C01F7/48; C01F7/50; C01F7/54; C05B1/00; C05B1/02
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |