US2848310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making single crystal ferrites
Assignee: AT&T Inc
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Filing: 1954-12-14
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Granted: 1958-08-19
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Expires: 1974-12-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph P Remeika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:22
CPC Classifications
C; C30; C30B; C30B9/00; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD OF MAKING SINGLE CRYSTALS OF FERRITE COMPRISING HEARIG LEAD OXIDE AND THE CONSTITUENT COMPONENTS OF A POLYMETALLIC FERRITE HAVING A SPINEL CRYSTAL STRUCTURE TO A TEMPERATURE ABOVE 880 DEGREES CENTIGRADE AT WHICH THE FERRITE IS DISSOLVED IN THE LEAD MONOXIDE, AND CRYSTALLIZING THE FERRITE MATERIAL OUT OF SOLUTION BY REDUCING THE TEMPERATURE OF THE MELT AT A RATE LESS THAN 30 DEGREE CENTIGRADE PER HOUR.
Claim 2
Independent Claim
67 words
A METHOD OF MAKING SINGLE CRYSTALS OF FERRITE COMPRISING HEARIG LEAD OXIDE AND THE CONSTITUENT COMPONENTS OF A POLYMETALLIC FERRITE HAVING A SPINEL CRYSTAL STRUCTURE TO A TEMPERATURE ABOVE 880 DEGREES CENTIGRADE AT WHICH THE FERRITE IS DISSOLVED IN THE LEAD MONOXIDE, AND CRYSTALLIZING THE FERRITE MATERIAL OUT OF SOLUTION BY REDUCING THE TEMPERATURE OF THE MELT AT A RATE LESS THAN 30 DEGREE CENTIGRADE PER HOUR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |