US3600484A
Expired / Lapsed
US
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Sintering ferroelectric materials such as barium titanite in a vacuum
Assignee: United States Department of the Army
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Filing: 1969-02-06
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Granted: 1971-08-17
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Expires: 1989-02-06
Abstract
Abstract THE DIELECTRIC PROPERTIES OF FERROELECTRIC MATERIALS SUCH AS BARIUM TITANATE ARE UPGRADED BY SINTERING THE DRY PRESSED SHAPES IN A VACUUM HAVING PARTIAL AIR PRESSURES OF 1 TO 1000 MICRONS. MAINTAINING THE VACUUM DURING COOLING IS OPTIONAL.
Inventors
- 👤 Edward J Smoke
- 👤 Howard Wichansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
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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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |