Patent US3272591A successfully refreshed from Google Patents.
US3272591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of single crystals from incongruently melting material
Assignee: Union Carbide Corp
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Filing: 1959-05-08
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Granted: 1966-09-13
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Expires: 1979-05-08
Abstract
No abstract record available.
Inventors
- 👤 Robert G Rudness
- 👤 Richard W Kebler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:25
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A PROCESS FOR GROWING A BOULE CONTAINING A UNICRYSTALLINE SECTION OF YTTRIUM IRON GARNET (3Y203.5FE203) COMPRISING (1) PREPARING A SUPPLY OF YTTRIUM IRON GARNET FEED MATERIAL, (2) PASSING THE YTTRIUM IRON GARNET FEED MATERIAL THROUGH A HEATED ZONE WHICH IS COAXIAL TO AN ACCUMULATION SUPPORT, (3) HEATING SAID YTTRIUM IRON GARNET FEED MATERIAL TO ESTABLISH A LIQUIDS COMPOSITION, (4) MAINTAINING THE LIQUIDUS COMPOSITION BETWEEN THE EUTECTIC AND PERITECTIC POINTS ON AN EQUILIBRIUM PHASE DIAGRAM OF YFEO3 AND FE2O3 AND AT A TEMPERATURE FROM ABOUT 1440*C. TO ABOUT 1580*C. WHILE ACCUMULATING YTTRIUM IRON GARNET CRYSTAL ON SAID SUPPORT FROM THE LIQUIDUS COMPOSITION, (5) GRADUALLY PROVIDING RELATIVE MOTION BETWEEN SAID SUPPORT AND HEATED ZONE AND (6) RECOVERING A BOULE CONTAINING A UNICRYSTALLINE SECTION OF YTTRIUM IRON GARNET.
Claim 2
Dependent Claim
125 words
A PROCESS FOR GROWING A BOULE CONTAINING A UNICRYSTALLINE SECTION OF YTTRIUM IRON GARNET (3Y203.5FE203) COMPRISING (1) PREPARING A SUPPLY OF YTTRIUM IRON GARNET FEED MATERIAL, (2) PASSING THE YTTRIUM IRON GARNET FEED MATERIAL THROUGH A HEATED ZONE WHICH IS COAXIAL TO AN ACCUMULATION SUPPORT, (3) HEATING SAID YTTRIUM IRON GARNET FEED MATERIAL TO ESTABLISH A LIQUIDS COMPOSITION, (4) MAINTAINING THE LIQUIDUS COMPOSITION BETWEEN THE EUTECTIC AND PERITECTIC POINTS ON AN EQUILIBRIUM PHASE DIAGRAM OF YFEO3 AND FE2O3 AND AT A TEMPERATURE FROM ABOUT 1440*C. TO ABOUT 1580*C. WHILE ACCUMULATING YTTRIUM IRON GARNET CRYSTAL ON SAID SUPPORT FROM THE LIQUIDUS COMPOSITION, (5) GRADUALLY PROVIDING RELATIVE MOTION BETWEEN SAID SUPPORT AND HEATED ZONE AND (6) RECOVERING A BOULE CONTAINING A UNICRYSTALLINE SECTION OF YTTRIUM IRON GARNET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |