US3075831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Growth of single crystals of corundum and gallium oxide
Assignee: AT&T Inc
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Filing: 1960-05-24
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Granted: 1963-01-29
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Expires: 1980-05-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Remeika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:02
CPC Classifications
C; C30; C30B; C30B9/00; C30B9/04; C30B9/08; C30B9/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
THE METHOD OF GROWING SINGLE CRYSTALS COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE AND GALLIUM OXIDE WHICH COMPRISES HEATING SAID MATERIAL TOGETHER WITH A MIXTURE OF LEAD OXIDE AND BORON OXIDE THE WEIGHT RATIO OF BORON OXIDE TO LEAD OXIDE BEING WITHIN THE APPROXIMATE RANGE OF 1:100 TO 10:100 AND COOLING THE RESULTANT MELT.
Claim 2
Independent Claim
60 words
THE METHOD OF GROWING SINGLE CRYSTALS COMPRISING AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALUMINUM OXIDE AND GALLIUM OXIDE WHICH COMPRISES HEATING SAID MATERIAL TOGETHER WITH A MIXTURE OF LEAD OXIDE AND BORON OXIDE THE WEIGHT RATIO OF BORON OXIDE TO LEAD OXIDE BEING WITHIN THE APPROXIMATE RANGE OF 1:100 TO 10:100 AND COOLING THE RESULTANT MELT.
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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |