Patent US3528584A successfully refreshed from Google Patents.
Patent US3030284A successfully refreshed from Google Patents.
US3030284A
Expired / Lapsed
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Electrolytic production of elemental boron
Assignee: American Potash and Chemical Corp
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Filing: 1960-11-03
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Granted: 1962-04-17
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 David R Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:22
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
145 words
A CONTINOUS PROCESS FOR PRODUCING BORON COMPRISING ELECTROLYZING A FUSED BATH BY PAASSING A CURRENT BETWEEN A CONSUMABLE CARBON ANODE AND AN INERT CATHODE, SAID BATH CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL FLUORIDE REPRESENTING NO MORE THAN 10% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID BATH, BORIC OXIDES AND AN ALKALI METAL OXIDE OF THE FORMULA M2O, WHERE M IS AN ALKALI METAL, THE BORIC OXIDE BEING PRESENT IN A WEIGHT CONCENTRATION AT LEAST 3% IN EXCESS OF THE PERCENTAGE OF BORIC OXIDE IN THE BORATE OF THE ALKALI METAL CORRESPONDING TO THE ALKALI METAL OXIDE HAVING SAID FORMULA M2O AND UP TO A TOTAL B2O3 CONTENT IN THE BATH OF ABOUT 95%, THE MOLE RATIO OF B2O3 TO M2O BEING OF ABOUT 2 TO 1 BY SUCH EXCESS OF B2O3 SAID ALKALI METAL BORATE BEING OF THE FORMULA M2B4O7.
Claim 2
Dependent Claim
145 words
A CONTINOUS PROCESS FOR PRODUCING BORON COMPRISING ELECTROLYZING A FUSED BATH BY PAASSING A CURRENT BETWEEN A CONSUMABLE CARBON ANODE AND AN INERT CATHODE, SAID BATH CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL FLUORIDE REPRESENTING NO MORE THAN 10% BY WEIGHT OF THE TOTAL WEIGHT OF THE SAID BATH, BORIC OXIDES AND AN ALKALI METAL OXIDE OF THE FORMULA M2O, WHERE M IS AN ALKALI METAL, THE BORIC OXIDE BEING PRESENT IN A WEIGHT CONCENTRATION AT LEAST 3% IN EXCESS OF THE PERCENTAGE OF BORIC OXIDE IN THE BORATE OF THE ALKALI METAL CORRESPONDING TO THE ALKALI METAL OXIDE HAVING SAID FORMULA M2O AND UP TO A TOTAL B2O3 CONTENT IN THE BATH OF ABOUT 95%, THE MOLE RATIO OF B2O3 TO M2O BEING OF ABOUT 2 TO 1 BY SUCH EXCESS OF B2O3 SAID ALKALI METAL BORATE BEING OF THE FORMULA M2B4O7.
References Cited (Backward Citations)
GB162655A
Cited
US2848396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |