US3192015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growth of large cubic form of boron nitride crystals
Assignee: General Electric Co
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Filing: 1963-04-01
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Granted: 1965-06-29
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert H Wentorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:42
CPC Classifications
C; C30; C30B; C30B1/00; C30B1/12; C01; C01B; C01B21/00; C01B21/06; C01B21/064; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A METHOD OF GROWING A LARGE COMPOSITE CUBIC BORON NITRIDE CRYSTAL WHICH COMPRISES: (A) PLACING A CUBIC BORON NITRIDE SEED SURROUNDED BY A MIXTURE OF HIGH PURITY HEXAGONAL BORON NITRIDE AND HIGH PURITY CATALYST SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS, LEAD, ANTIMONY, TIN AND NITRIDES OF THE FOREGOING METALS IN A METALLIC SHIELD MEANS, (B) SIMULTANEOUSLY SUBJECTING THESE MATERIALS TO PRESSURE IN THE RANGE OF FROM ABOUT 40 TO ABOUT 60 KILOBARS AND TO TEMPERATURE IN THE RANGE OF FROM ABOUT 1400*C. TO ABOUT 2100*C., AND (C) REDUCING THE TEMPERATURE AND PRESSURE AND RECOVERING A CUBIC BORON NITRIDE CRYSTAL CONSISTING ESSENTIALLY OF THE CUBIC BORON NITRIDE SEED COMPLETELY ENVELOPED BY AN AFTERGROWN LAYER OF CUBIC BORON NITRIDE DISTINGUISHABLE FROM SAID SEED AND SECURELY BONDED THERETO.
Claim 2
Independent Claim
130 words
A METHOD OF GROWING A LARGE COMPOSITE CUBIC BORON NITRIDE CRYSTAL WHICH COMPRISES: (A) PLACING A CUBIC BORON NITRIDE SEED SURROUNDED BY A MIXTURE OF HIGH PURITY HEXAGONAL BORON NITRIDE AND HIGH PURITY CATALYST SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS, LEAD, ANTIMONY, TIN AND NITRIDES OF THE FOREGOING METALS IN A METALLIC SHIELD MEANS, (B) SIMULTANEOUSLY SUBJECTING THESE MATERIALS TO PRESSURE IN THE RANGE OF FROM ABOUT 40 TO ABOUT 60 KILOBARS AND TO TEMPERATURE IN THE RANGE OF FROM ABOUT 1400*C. TO ABOUT 2100*C., AND (C) REDUCING THE TEMPERATURE AND PRESSURE AND RECOVERING A CUBIC BORON NITRIDE CRYSTAL CONSISTING ESSENTIALLY OF THE CUBIC BORON NITRIDE SEED COMPLETELY ENVELOPED BY AN AFTERGROWN LAYER OF CUBIC BORON NITRIDE DISTINGUISHABLE FROM SAID SEED AND SECURELY BONDED THERETO.
Claim 3
Dependent Claim
43 words
AS AN ARTICLE OF MANUFACTURE, A COMPOSITE CUBIC BORON NITRIDE CRYSTAL CONSISTING ESSENTIALLY OF A PREFORMED CUBIC BORON NITRIDE CRYSTAL CORE AND AT LEAST ONE AFTERGROWN LAYER OF CUBIC BORON NITRIDE DISTINGUISHABLE FROM SAID CORE, COMPLETELY ENVELOPING SAID CORE AND SECURELY BONDED THEREIN.
Claim 4
Dependent Claim
43 words
AS AN ARTICLE OF MANUFACTURE, A COMPOSITE CUBIC BORON NITRIDE CRYSTAL CONSISTING ESSENTIALLY OF A PREFORMED CUBIC BORON NITRIDE CRYSTAL CORE AND AT LEAST ONE AFTERGROWN LAYER OF CUBIC BORON NITRIDE DISTINGUISHABLE FROM SAID CORE, COMPLETELY ENVELOPING SAID CORE AND SECURELY BONDED THEREIN.
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) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |