US2989483A
Expired / Lapsed
US
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Method of making polarized titanate ceramics
Assignee: Ambac International Corp
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Filing: 1958-11-07
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Granted: 1961-06-20
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Expires: 1978-11-07
Abstract
No abstract record available.
Inventors
- 👤 Walter S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4684
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF MAKING A POLARIZED CERAMIC OF THE PEROVSKITE TYPE STRUCTURE CONSISTING OF (A) HOMOGENEOUSLY FORMING A MIX OF AN UNFIRED METALLIC TITANATE SELECTED FROM THE GROUP CONSISTING OF BARIUM TITANATE, CALCIUM TITANATE, LITHIUM TITANATE, LEAD TITANATE AND COMBINATIONS THEREOF AND LITHIUM CHLORIDE IN AMOUNTS SUCH THAT LITHIUM IONS ARE PRESENT IN THE AMOUNT OF ABOUT 1 TO 5 PERCENT BASED ON THE DRY WEIGHT OF THE MIX AND (B) SUBSEQUENTLY FIRING THE MIX AT A TEMPERATURE FROM ABOUT 2500* TO 3200* FOR FROM ABOUT 2 TO 3 HOURS.
Claim 2
Independent Claim
90 words
A METHOD OF MAKING A POLARIZED CERAMIC OF THE PEROVSKITE TYPE STRUCTURE CONSISTING OF (A) HOMOGENEOUSLY FORMING A MIX OF AN UNFIRED METALLIC TITANATE SELECTED FROM THE GROUP CONSISTING OF BARIUM TITANATE, CALCIUM TITANATE, LITHIUM TITANATE, LEAD TITANATE AND COMBINATIONS THEREOF AND LITHIUM CHLORIDE IN AMOUNTS SUCH THAT LITHIUM IONS ARE PRESENT IN THE AMOUNT OF ABOUT 1 TO 5 PERCENT BASED ON THE DRY WEIGHT OF THE MIX AND (B) SUBSEQUENTLY FIRING THE MIX AT A TEMPERATURE FROM ABOUT 2500* TO 3200* FOR FROM ABOUT 2 TO 3 HOURS.
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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |