US2980546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic dielectric materials
Assignee: BRITISH DIELECTRIC RES Ltd
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Filing: 1957-04-12
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Granted: 1961-04-18
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Expires: 1977-04-12
Abstract
No abstract record available.
Inventors
- 👤 Plessner Karl Wolfgang
- 👤 West Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:23
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
A BARIUM TITANATE CERAMIC DIELECTRIC MATERIAL CONSISTING ESSENTIALLY OF BARIUM OXIDE, AN ALKALINE EARTH OXIDE, AN OXIDE FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND MANGANESE OXIDE, TITANIA AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF STANNIC OXIDE AND ZIRCONIA, THE RELATIONSHIP BETWEEN THE BARIUM OXIDE CONTENT AND TITANIA CONTENT BEING SUBSTANTIALLY STOICHIOMETRIC FOR THE FORMATION OF BARIUM TITANATE, THE RELATIONSHIP BETWEEN THE ALKALINE EARTH OXIDE CONTENT AND THE CONTENT OF SAID GROUP ZIRCONIA AND STANNIC OXIDE BEING SUBSTANTIALLY STOICHIOMETRIC FOR THE FORMATION OF AT LEAST ONE OF AN ALKALINE EARTH STANNATE AND ZIRCONATE IN AN AMOUNT LESS THAN THE AMOUNT OF BARIUM TITANATE AND AT LEAST 2% BY WEIGHT OF THE BARIUM TITANATE AND SAID ONE OF ALKALINE EARTH STANNATE AND ZIRCONATE TOGETHER, AND THE CONTENT OF THE OXIDE FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND MANGANESE BEING THE MOLECULAR EQUIVALENT OF 1/4%-1% OF MAGNESIUM OXIDE BASED ON THE TOTAL WEIGHT OF ALL OTHER INGREDIENTS.
Claim 2
Dependent Claim
160 words
A BARIUM TITANATE CERAMIC DIELECTRIC MATERIAL CONSISTING ESSENTIALLY OF BARIUM OXIDE, AN ALKALINE EARTH OXIDE, AN OXIDE FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND MANGANESE OXIDE, TITANIA AND AN OXIDE SELECTED FROM THE GROUP CONSISTING OF STANNIC OXIDE AND ZIRCONIA, THE RELATIONSHIP BETWEEN THE BARIUM OXIDE CONTENT AND TITANIA CONTENT BEING SUBSTANTIALLY STOICHIOMETRIC FOR THE FORMATION OF BARIUM TITANATE, THE RELATIONSHIP BETWEEN THE ALKALINE EARTH OXIDE CONTENT AND THE CONTENT OF SAID GROUP ZIRCONIA AND STANNIC OXIDE BEING SUBSTANTIALLY STOICHIOMETRIC FOR THE FORMATION OF AT LEAST ONE OF AN ALKALINE EARTH STANNATE AND ZIRCONATE IN AN AMOUNT LESS THAN THE AMOUNT OF BARIUM TITANATE AND AT LEAST 2% BY WEIGHT OF THE BARIUM TITANATE AND SAID ONE OF ALKALINE EARTH STANNATE AND ZIRCONATE TOGETHER, AND THE CONTENT OF THE OXIDE FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT AND MANGANESE BEING THE MOLECULAR EQUIVALENT OF 1/4%-1% OF MAGNESIUM OXIDE BASED ON THE TOTAL WEIGHT OF ALL OTHER INGREDIENTS.
Claim 3
Dependent Claim
85 words
A CERAMIC MATERIAL IN ACCORDANCE WITH CLAIM 1 IN WHICH THE RELATIONSHIP BETWEEN THE BARIUM OXIDE AND TITANIUM DIOXIDE CONTENT IS VARIED FROM STOICHIOMETRIC TO THE EXTENT THAT THE EXCESS OF ONE OF THESE CONSTITUENTS IS SUFFICIENT TO FORM A MOLAR PERCENTAGE NOT GREATER THAN 5 OF ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH TITANATE AND AT LEAST ONE OF BARIUM ZIRCONATE AND BARIUM STANNATE, THE RATIO OF (BAO+ALKALINE EARTH OXIDE):((ONE OF ZRO2 AND SNO2)+TIO2) BEING WITHIN THE LIMITS 0.98:1 AND 1.02:1.
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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) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |