Patent US3869398A successfully refreshed from Google Patents.
US3869398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric porcelain composition
Assignee: Taiyo Yuden Co Ltd
•
Filing: 1973-08-23
•
Granted: 1975-03-04
•
Expires: 1993-08-23
Abstract
Abstract A dielectric porcelain composition comprising a sintered product composed of above 2% by weight but below 31% by weight of lead titanate (PbTiO3), above 35% by weight but below 83% by weight of strontium titanate (SrTiO3), above 3% by weight but below 19.1% by weight of bismuth oxide (Bi2O3) above 0.5% by weight but below 18% by weight of titanium oxide (TiO2) and above 2.8% by weight but below 20.1% by weight of calcium titanate (CaTiO3), the weight ratio of titanium oxide (TiO2) to bismuth oxide (Bi2O3) being between 0.2 and 2.0.
Inventors
- 👤 Nobutatu Yamaoka
- 👤 Yasunori Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/47; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1209; H01G4/1218; H01G4/1227
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A DIELECTRIC PORECLAIN COMPOSITION COMPRISING A SINTERED PRODUCT CONSISTING ESSENTIALLY OF ABOVE 2% BY WEIGHT BUT BELOW 31% BY WEIGHT OF LEAD TITANATE (PBTIO3), ABOVE 35% BY WEIGHT BUT BELOW 83% BY WEIGHT BOF STROMTIUM TITANTE (SRTIO3), ABOVE 3% BY WEIGHT BUT BELOW 19.1% BY WEIGHT OF BISMUTH OXIDE (BI2O3), ABOVE 0.5% BY WEIGHT BUTYL BELOW 18% BY WEIGHT OF TITANIUM OXIDE (TIO2) AND ABOVE 2.8% BY WEIGHT BUT BELOW 20.1% BY WEIGHT OF CALCIUM TITANATE (CATIO3), THE WEIGHT RATIO OF TITANIUM OXIDE (TIO2) TO BISMUTH OXIDE (BI2O3) BEING BETWEEN 0.2 AND 2.0
Claim 2
Dependent Claim
93 words
A DIELECTRIC PORECLAIN COMPOSITION COMPRISING A SINTERED PRODUCT CONSISTING ESSENTIALLY OF ABOVE 2% BY WEIGHT BUT BELOW 31% BY WEIGHT OF LEAD TITANATE (PBTIO3), ABOVE 35% BY WEIGHT BUT BELOW 83% BY WEIGHT BOF STROMTIUM TITANTE (SRTIO3), ABOVE 3% BY WEIGHT BUT BELOW 19.1% BY WEIGHT OF BISMUTH OXIDE (BI2O3), ABOVE 0.5% BY WEIGHT BUTYL BELOW 18% BY WEIGHT OF TITANIUM OXIDE (TIO2) AND ABOVE 2.8% BY WEIGHT BUT BELOW 20.1% BY WEIGHT OF CALCIUM TITANATE (CATIO3), THE WEIGHT RATIO OF TITANIUM OXIDE (TIO2) TO BISMUTH OXIDE (BI2O3) BEING BETWEEN 0.2 AND 2.0
References Cited (Backward Citations)
US2369327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |