US2958634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluorinated hydrazines
Assignee: EIDP Inc
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Filing: 1959-05-27
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Granted: 1960-11-01
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Expires: 1979-05-27
Abstract
No abstract record available.
Inventors
- 👤 Cleaver Charles Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01; C25B1/24; C25B1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR THE PREPARATION OF TETRAFLUOROHYDRAZINE, WHICH COMPRISES ELECTROLYZING, WITH THE USE OF A NICKEL ANODE, A MOLTEN MIXTURE OF AMMONIUM BIFLUORIDE WITH FROM 0.1 TO 0.9 MOLE, PER MOLE OF AMMONIUM BIFLUORIDE, OF A FLUORIDE ION ACCEPTOR SELECTED FROM THE CLASS CONSISTING OF BINARY FLUORIDES OF HYDROGEN, OF ELEMENTS OF GROUP IIIA OF THE PERIODIC TABLE HAVING ATOMIC NUMBERS FROM 5 TO 13, INCLUSIVE, AND OF ELEMENTS OF GROUP VA OF THE PERIODIC TABLE HAVING ATOMIC NUMBERS FROM 15 TO 51, INCLUSIVE, AT A TEMPERATURE ABOVE THE MELTING POINT BUT BELOW THE VOLATILIZATION TEMPERATURE OF SAID MIXTURE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE PREPARATION OF TETRAFLUOROHYDRAZINE, WHICH COMPRISES ELECTROLYZING, WITH THE USE OF A NICKEL ANODE, A MOLTEN MIXTURE OF AMMONIUM BIFLUORIDE WITH FROM 0.1 TO 0.9 MOLE, PER MOLE OF AMMONIUM BIFLUORIDE, OF A FLUORIDE ION ACCEPTOR SELECTED FROM THE CLASS CONSISTING OF BINARY FLUORIDES OF HYDROGEN, OF ELEMENTS OF GROUP IIIA OF THE PERIODIC TABLE HAVING ATOMIC NUMBERS FROM 5 TO 13, INCLUSIVE, AND OF ELEMENTS OF GROUP VA OF THE PERIODIC TABLE HAVING ATOMIC NUMBERS FROM 15 TO 51, INCLUSIVE, AT A TEMPERATURE ABOVE THE MELTING POINT BUT BELOW THE VOLATILIZATION TEMPERATURE OF SAID MIXTURE.
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |