US3676351A
Expired / Lapsed
US
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Ceramic dielectric comprising calcium titanosilicate
Assignee: Panasonic Holdings Corp
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Filing: 1970-08-06
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Granted: 1972-07-11
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Expires: 1990-08-06
Abstract
Abstract Dielectric ceramics having a high dielectric constant, an extremely low dissipation factor, and a controlled temperature coefficient of dielectric constant between +800 and -1,000ppm/* C consists, according to this invention, of three phases composed essentially of, Mol percent calciumtitanosilicate10 about 99.5strontium titanate0.5 about 30titanium dioxideremainder.
Inventors
- 👤 Hiromitsu Taki
- 👤 Shigeru Hayakawa
- 👤 Kaneomi Nagase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; H; H01; H01B; H01B3/00; H01B3/02; H01B3/025; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A fired ceramic dielectric composition having a dielectric constant of 50 to 164, a dissipation factor below 5 X 10 4, and a linear temperature coefficient of dielectric constant of +800 to -1,000 parts per million per * C in the temperature range of -30* to +85* C, said composition consisting essentially of two phases of 70 to 99.5 mole percent of calcium titanosilicate and 0.5 to 30 mole percent of strontium titanate.
Claim 2
Dependent Claim
81 words
A fired ceramic dielectric composition having a dielectric constant of 50 to 164, a dissipation factor below 5 X 10 4, and a linear temperature coefficient of dielectric constant of +800 to -1,000 parts per million per * C in the temperature range of -30* to +85* C, said composition consisting essentially of three phases of 10 to 69.5 mole percent of calcium titanosilicate, 0.5 to 89.5 mole percent of titanium dioxide and 0.5 to 30 mole percent of strontium titanate.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |