US2865715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of boron compounds
Assignee: Millennium Petrochemicals Inc
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Filing: 1955-03-03
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Granted: 1958-12-23
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Expires: 1975-03-03
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:48
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C01B21/0645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE MANUFACTURE OF BORON NITRIDE WHICH COMPRISES REACTING A BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC OXIDE, METABORIC ACID, ORTHOBORIC ACID, THE ALKALI METAL METABORATES, THE ALKALI METAL ORTHOBORATES, AND THE ALKALI METAL TETRABORATES WITH AT LEAST STOICHIOMETRIC PROPORTIONS OF AN ALKALI METAL AMIDE AT A TEMPERATURE BETWEEN 210*C. AND 1000*C., IN AN AMMONIA ATMOSPHERE, TREATING THE RESULTING REACTION MIXTURE WITH WATER, SEPARATING THE WATER-INSOLUBLE BORON NITRIDE FROM THE CONCOMITANT WATER-SOLUBLE REACTION PRODUCTS AND HEATING SAID BORON NITRIDE AT A TEMPERATURE OF FROM 1800*C. TO 2200*C., WHEREBY IT BECOMES MORE STABLE.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE MANUFACTURE OF BORON NITRIDE WHICH COMPRISES REACTING A BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC OXIDE, METABORIC ACID, ORTHOBORIC ACID, THE ALKALI METAL METABORATES, THE ALKALI METAL ORTHOBORATES, AND THE ALKALI METAL TETRABORATES WITH AT LEAST STOICHIOMETRIC PROPORTIONS OF AN ALKALI METAL AMIDE AT A TEMPERATURE BETWEEN 210*C. AND 1000*C., IN AN AMMONIA ATMOSPHERE, TREATING THE RESULTING REACTION MIXTURE WITH WATER, SEPARATING THE WATER-INSOLUBLE BORON NITRIDE FROM THE CONCOMITANT WATER-SOLUBLE REACTION PRODUCTS AND HEATING SAID BORON NITRIDE AT A TEMPERATURE OF FROM 1800*C. TO 2200*C., WHEREBY IT BECOMES MORE STABLE.
References Cited (Backward Citations)
US1157271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |