Patent US2962359A successfully refreshed from Google Patents.
US2962359A
Expired / Lapsed
US
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Process for making aluminum nitride
Assignee: Pechiney SA
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Filing: 1957-07-15
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Granted: 1960-11-29
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Perieres Rene
- 👤 Bollack Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:47
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/072; C01B21/0726
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A PROCESS FOR PRODUCING ALUMINUIM NITRIDE BY REACTING A CHARGE CONTAINING ALUMINA AND CARBON WITH GASEOUS NITROGEN, THE IMPROVEMENT WHICH COMPRISES MAINTAING A REACTION TEMPERATURE NITROGEN THROUGH AND CONTINUOUSLY PASSING SAID GASEOUS NITROGEN THROUGH SAID ALUMINA AND CARBON CHARGE AT SUCH A RATE AS TO MAINTAIN IN THE EXHAUST GASES AT ALL TIMES DURING THE REACTION A NITROGEN CONCENTRATION OF A LEAST 30% BY VOLUME AND SUFFICIENT TO PREVENT THE FORMATION OF LOCAL MELTS, THE LOWER THE TEMPERATURE, THE HIGHER THE NITROGEN CONCENTRATION REQUIRED.
Claim 2
Dependent Claim
85 words
IN A PROCESS FOR PRODUCING ALUMINUIM NITRIDE BY REACTING A CHARGE CONTAINING ALUMINA AND CARBON WITH GASEOUS NITROGEN, THE IMPROVEMENT WHICH COMPRISES MAINTAING A REACTION TEMPERATURE NITROGEN THROUGH AND CONTINUOUSLY PASSING SAID GASEOUS NITROGEN THROUGH SAID ALUMINA AND CARBON CHARGE AT SUCH A RATE AS TO MAINTAIN IN THE EXHAUST GASES AT ALL TIMES DURING THE REACTION A NITROGEN CONCENTRATION OF A LEAST 30% BY VOLUME AND SUFFICIENT TO PREVENT THE FORMATION OF LOCAL MELTS, THE LOWER THE TEMPERATURE, THE HIGHER THE NITROGEN CONCENTRATION REQUIRED.
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) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |