Patent US2954300A successfully refreshed from Google Patents.
US2954300A
Expired / Lapsed
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Method of preparation of single crystal ferroelectrics
Assignee: International Business Machines Corp
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Filing: 1958-10-31
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Granted: 1960-09-27
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Expires: 1978-10-31
Abstract
No abstract record available.
Inventors
- 👤 Triebwasser Sol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:17
CPC Classifications
C; C30; C30B; C30B17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF PREPARATION OF HOMOGENEOUS SOLID SOLUTION SINGLE CRYSTALS OF FERROELECTRIC MATERIALS HAVING CURIE POINTS EXTENDING OVER A WIDE TEMPERATURE RANGE, COMPRISING THE STEPS OF PROVIDING A MELT OF KTAO3KNBO3 IN PREDETERMINED PROPORTIONS AT A TEMPERATURE JUST ABOVE THE LIQUIDOUS TEMPERATURE OF SAID MATERIAL, COOLING SAID MELT AT A RATE OF ABOUT 0.1*C. PER HOUR TO A POINT JUST BELOW THE LIQUIDOUS TEMPERATURE OF SAID MELT, MAINTAINING SAID MELT AT SAID LOWER TEMPERATURE DURING A TIME INTERVAL IN WHICH A SINGLE CRYSTAL SOLID SOLUTION IS FORMED THE MASS OF WHICH IS SMALL IN RELATION TO THE MASS OF THE MELT, SEPARATING THE CRYSTAL THUS FORMED FROM THE BULK OF THE MELT, AND THEREAFTER COOLING SAID CRYSTAL TO ROOM TEMPERATURE OVER AN EXTENDED PERIOD OF TIME.
Claim 2
Independent Claim
126 words
A METHOD OF PREPARATION OF HOMOGENEOUS SOLID SOLUTION SINGLE CRYSTALS OF FERROELECTRIC MATERIALS HAVING CURIE POINTS EXTENDING OVER A WIDE TEMPERATURE RANGE, COMPRISING THE STEPS OF PROVIDING A MELT OF KTAO3KNBO3 IN PREDETERMINED PROPORTIONS AT A TEMPERATURE JUST ABOVE THE LIQUIDOUS TEMPERATURE OF SAID MATERIAL, COOLING SAID MELT AT A RATE OF ABOUT 0.1*C. PER HOUR TO A POINT JUST BELOW THE LIQUIDOUS TEMPERATURE OF SAID MELT, MAINTAINING SAID MELT AT SAID LOWER TEMPERATURE DURING A TIME INTERVAL IN WHICH A SINGLE CRYSTAL SOLID SOLUTION IS FORMED THE MASS OF WHICH IS SMALL IN RELATION TO THE MASS OF THE MELT, SEPARATING THE CRYSTAL THUS FORMED FROM THE BULK OF THE MELT, AND THEREAFTER COOLING SAID CRYSTAL TO ROOM TEMPERATURE OVER AN EXTENDED PERIOD OF TIME.
References Cited (Backward Citations)
US2598707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |