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Patent US3128153A successfully refreshed from Google Patents.
US3128153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of the nitrides of aluminum and gallium
Assignee: General Electric Co
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Filing: 1961-05-01
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Granted: 1964-04-07
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Addamiano Arrigo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:58
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/072; C01B21/0632; C01B21/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A METHOD OF PREPARING ALUMINUM AND GALLIUM NITRIDES COMPRISING THE STEPS OF REACTING A POWDER SELECTED FROM THE CLASS CONSISTING OF THE PHOSPHIDE AND ARSENIDE OF ALUMINUM AND GALLIUM WITH ANHYDROUS AMMONIA GAS AT A TEMPERATURE BETWEEN APPROXIMATELY 700* AND 1200* C., THEN FIRING THE RESULTANT PRODUCT IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF ANHYDROUS AMMONIA GAS AT APPROXIMATELY 1200*C. TO PROMOTE CRYSTALLIZATION AND THEN COOLING THE RESULTANT PRODUCT.
Claim 2
Independent Claim
68 words
A METHOD OF PREPARING ALUMINUM AND GALLIUM NITRIDES COMPRISING THE STEPS OF REACTING A POWDER SELECTED FROM THE CLASS CONSISTING OF THE PHOSPHIDE AND ARSENIDE OF ALUMINUM AND GALLIUM WITH ANHYDROUS AMMONIA GAS AT A TEMPERATURE BETWEEN APPROXIMATELY 700* AND 1200* C., THEN FIRING THE RESULTANT PRODUCT IN AN ATMOSPHERE CONSISTING ESSENTIALLY OF ANHYDROUS AMMONIA GAS AT APPROXIMATELY 1200*C. TO PROMOTE CRYSTALLIZATION AND THEN COOLING THE RESULTANT PRODUCT.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |