US3631081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rare earth perfluorotertiarybutoxides containing coordinated ammonia
Assignee: Honeywell International Inc
•
Filing: 1970-01-19
•
Granted: 1971-12-28
•
Expires: 1990-01-19
Abstract
Abstract RARE EARTH PERFLUOROTERTIARYBUTOXIDES CONTAINING COORDINATED AMMOIA AND HAVING THE FORMULA (NH3)3M(OC(CF3)3)3 WHEREIN M REPRESENTS AN ION OF A RARE EARTH METAL, ARE PREPARED BY REACTING PREFLUOROTERTIARYBUTANOL WITH AN IONIZABLE RARE EARTH SALT AND AMMONIA IN THE PRESENCE OF AN INERT SOLVENT. THESE COMPOUNDS ARE NOVEL AND MORE VOLATILE THAN ANY RARE EARTH COMPOUNDS PREVIOUSLY KNOWN. BECAUSE OF THEIR VOLATILITY, THE COMPOUNDS ARE USEFUL IN SUCH APPLICATIONS AS THE SEPARATION OF INDIVIDUAL RARE EARTHS BY FRACTIONAL SUBLIMATION.
Inventors
- 👤 Dale K Huggins
- 👤 William B Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:38
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/003
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |