US2940911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrorefining of elemental boron
Assignee: American Potash and Chemical Corp
•
Filing: 1959-01-02
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Granted: 1960-06-14
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Uchiyama Aiji Alvin
- 👤 Stern David Russell
- 👤 Mckenna Quentin Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:03
CPC Classifications
C; C25; C25B; C25B1/00; C01; C01B; C01B35/00; C01B35/02; C01B35/023; C25B1/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PRODUCTION OF A PURIFIED BORON COMPRISING PASSING A CURRENT BETWEEN A CRUDE BORON ANODE AND A CATHODE UNDER A POTENTIAL OF LESS THAN ABOUT 3 VOLTS, THROUGH A FUSED SALT BATH AT A TEMPERATURE BETWEEN ABOUT 350*C. AND ABOUT 1000*C. TO DEPOSIT BORON ON THE CATHODE, THE BATH CONSISTING ESSENTIALLY OF AN ALKALI METAL CHLORIDE AND AN ALKALI METAL FLUOBORATE, THE FLUOBORATE PROVIDING FROM ABOUT 3% TO ABOUT 50% OF THE MIXTURE.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PRODUCTION OF A PURIFIED BORON COMPRISING PASSING A CURRENT BETWEEN A CRUDE BORON ANODE AND A CATHODE UNDER A POTENTIAL OF LESS THAN ABOUT 3 VOLTS, THROUGH A FUSED SALT BATH AT A TEMPERATURE BETWEEN ABOUT 350*C. AND ABOUT 1000*C. TO DEPOSIT BORON ON THE CATHODE, THE BATH CONSISTING ESSENTIALLY OF AN ALKALI METAL CHLORIDE AND AN ALKALI METAL FLUOBORATE, THE FLUOBORATE PROVIDING FROM ABOUT 3% TO ABOUT 50% OF THE MIXTURE.
References Cited (Backward Citations)
US2572248A
Cited
US2832730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |