US2839366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of boron nitride
Assignee: Millennium Petrochemicals Inc
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Filing: 1953-06-18
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Granted: 1958-06-17
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Expires: 1973-06-18
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:03
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C01B21/0645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF BORON NITRIDE WHICH COMPRISES THE STEPS OF REACTING FROM TWO TO FIVE MOLES OF BORIC ANHYDRIDE WITH TWO MOLES OF A MEMBER OF THE GROUP OF ALKALI METAL CYANIDES CONSISTING OF SODIUM CYANIDE AND POTASSIUM CYANIDE, AT TEMPERATURES BETWEEN 800*C. AND 1500*C., UNTIL EVOLUTION OF CARBON MONOXIDE IS SUBSTANTIALLY COMPLETE, THEREAFTER COOLING, SOLIDIFYING AND COMMINUTING THE SOLIDIFIED REACTION MIXTURE, THEREAFTER SEPARATING THE WATER-INSOLUBLE BORON NITRIDE FROM THE WATER-SOLUBLE ALKALI METAL BORATES AND THEREAFTER STABILIZING THE BORON NITRIDES BY HEATING AT A TEMPERATURE OF FROM 1900*C. TO 2200*C.
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE MANUFACTURE OF BORON NITRIDE WHICH COMPRISES THE STEPS OF REACTING FROM TWO TO FIVE MOLES OF BORIC ANHYDRIDE WITH TWO MOLES OF A MEMBER OF THE GROUP OF ALKALI METAL CYANIDES CONSISTING OF SODIUM CYANIDE AND POTASSIUM CYANIDE, AT TEMPERATURES BETWEEN 800*C. AND 1500*C., UNTIL EVOLUTION OF CARBON MONOXIDE IS SUBSTANTIALLY COMPLETE, THEREAFTER COOLING, SOLIDIFYING AND COMMINUTING THE SOLIDIFIED REACTION MIXTURE, THEREAFTER SEPARATING THE WATER-INSOLUBLE BORON NITRIDE FROM THE WATER-SOLUBLE ALKALI METAL BORATES AND THEREAFTER STABILIZING THE BORON NITRIDES BY HEATING AT A TEMPERATURE OF FROM 1900*C. TO 2200*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |