Patent US3141847A successfully refreshed from Google Patents.
US3141847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-type electrically conducting cubic boron nitride and process for preparing same
Assignee: General Electric Co
•
Filing: 1960-08-31
•
Granted: 1964-07-21
•
Expires: 1980-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert H Wentorf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:18
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
N-TYPE ELECTRICALLY CONDUCTING CUBIC BORON NITRIDE HAVING A ZINC-BLENDE CUBIC STRUCTURE PREPARED BY HEATING AT ELEVATED TEMPERATURES IN EXCESS OF 1200*C. AND PRESSURES IN EXCESS OF 40,000 ATMOSPHERES A MIXTURE COMPRISING HEXAGONAL BORON NITRIDE AND A CATALYST FOR THE CONVERSION THEREOF OF CUBIC BORON NITRIDE IN THE PRESENCE OF FROM 1 TO 40 PERCENT, BY WEIGHT, BASED ON THE WEIGHT OF THE HEXAGONAL BORON NITRIDE, OF A CARBON-NITROGEN COMPOUND DIFFERENT FROM THE AFORESAID CATALYST AND WHICH IS SUBSTANTIALLY FREE OF OXYGEN AND CONTAINS CARBON ATTACHED DIRECTLY TO NITROGEN.
Claim 2
Dependent Claim
88 words
N-TYPE ELECTRICALLY CONDUCTING CUBIC BORON NITRIDE HAVING A ZINC-BLENDE CUBIC STRUCTURE PREPARED BY HEATING AT ELEVATED TEMPERATURES IN EXCESS OF 1200*C. AND PRESSURES IN EXCESS OF 40,000 ATMOSPHERES A MIXTURE COMPRISING HEXAGONAL BORON NITRIDE AND A CATALYST FOR THE CONVERSION THEREOF OF CUBIC BORON NITRIDE IN THE PRESENCE OF FROM 1 TO 40 PERCENT, BY WEIGHT, BASED ON THE WEIGHT OF THE HEXAGONAL BORON NITRIDE, OF A CARBON-NITROGEN COMPOUND DIFFERENT FROM THE AFORESAID CATALYST AND WHICH IS SUBSTANTIALLY FREE OF OXYGEN AND CONTAINS CARBON ATTACHED DIRECTLY TO NITROGEN.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |