Patent US1869870A successfully refreshed from Google Patents.
US2695239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barium titanate capacitors
Assignee: Erie Resistor Corp
•
Filing: 1951-05-03
•
Granted: 1954-11-23
•
Expires: 1971-05-03
Abstract
No abstract record available.
Inventors
- 👤 Howard I Oshry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A BARIUM TITANATE CERAMIC DIELECTRIC HAVING A CUBIC CRYSTAL STRUCTURE AS DETERMINED BY X-RAY DIFFRACTION BELOW THE CURIE POINT IN WHICH THE CRYSTAL LATTICE OF THE CERAMIC CONTAINS IONS OF FROM .1% TO 21/2 BY WEIGHT OF METALS WHOSE BIVALENT IONIC RADII ARE IN THE RANGE OF FROM .6 TO 1.0 ANGSTROM UNIT AND WHOSE BIVALENT IONIC POTENTIALS ARE IN THE RANGE OF FROM 1.4 TO 1.8.
Claim 2
Dependent Claim
67 words
A BARIUM TITANATE CERAMIC DIELECTRIC HAVING A CUBIC CRYSTAL STRUCTURE AS DETERMINED BY X-RAY DIFFRACTION BELOW THE CURIE POINT IN WHICH THE CRYSTAL LATTICE OF THE CERAMIC CONTAINS IONS OF FROM .1% TO 21/2 BY WEIGHT OF METALS WHOSE BIVALENT IONIC RADII ARE IN THE RANGE OF FROM .6 TO 1.0 ANGSTROM UNIT AND WHOSE BIVALENT IONIC POTENTIALS ARE IN THE RANGE OF FROM 1.4 TO 1.8.
References Cited (Backward Citations)
US2429588A
Cited
US2377910A
Cited
US2402515A
Cited
US2402516A
Cited
US2452532A
Cited
US2576378A
Cited
US2576379A
Cited
US2533140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |