US2987383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of elemental boron
Assignee: US Borax Inc
•
Filing: 1957-12-02
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Granted: 1961-06-06
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Expires: 1977-12-02
Abstract
No abstract record available.
Inventors
- 👤 Schulein Joseph
- 👤 Yannacakis John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
THE METHOD OF REMOVING IMPURITIES FROM ELEMENTAL BORON, SAID METHOD COMPRISING FORMING A BODY OF ELEMENTAL BORON, SAID BODY SUBSTANTIALLY ENCLOSING A CAVITY AND HAVING AN INNER SURFACE, ARRANGING AN ELECTRICAL RESISTANCE ELEMENT WITHIN THE CAVITY OF SAID BODY, SURROUNDING SAID BODY BY AN EVACUABLE ENCLOSURE, REMOVING ATMOSPHERIC GASES FROM THE ENCLOSURE, AND SUPPLYING RADIANT HEAT TO THE INNER SURFACE OF THE BODY BY MEANS OF SAID RESISTANCE ELEMENT, IN QUANTITY SUFFICIENT TO HEAT THE ELEMENTAL BORON ADJACENT THE INNER SURFACE APPROXIMATELY TO FUSING TEMPERATURE.
Claim 2
Independent Claim
85 words
THE METHOD OF REMOVING IMPURITIES FROM ELEMENTAL BORON, SAID METHOD COMPRISING FORMING A BODY OF ELEMENTAL BORON, SAID BODY SUBSTANTIALLY ENCLOSING A CAVITY AND HAVING AN INNER SURFACE, ARRANGING AN ELECTRICAL RESISTANCE ELEMENT WITHIN THE CAVITY OF SAID BODY, SURROUNDING SAID BODY BY AN EVACUABLE ENCLOSURE, REMOVING ATMOSPHERIC GASES FROM THE ENCLOSURE, AND SUPPLYING RADIANT HEAT TO THE INNER SURFACE OF THE BODY BY MEANS OF SAID RESISTANCE ELEMENT, IN QUANTITY SUFFICIENT TO HEAT THE ELEMENTAL BORON ADJACENT THE INNER SURFACE APPROXIMATELY TO FUSING TEMPERATURE.
References Cited (Backward Citations)
US937120A
Cited
US2402582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |