US2997635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic capacitors
Assignee: Sprague Electric Co
•
Filing: 1957-09-17
•
Granted: 1961-08-22
•
Expires: 1977-09-17
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:41
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/08; H01G4/12; H01G4/1272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A CERAMIC CAPACITOR WHICH COMPRISES A CERAMIC DIELECTRIC BODY OF THE TITANATE TYPE, AN ANODE ELECTRODE ON A SURFACE OF SAID BODY, A BARRIER OF A COMPOUND CONTAINING AN ELEMENT OF A POSITIVE VALENCE OF FIVE OR MORE DISPOSED AT SAID SURFACE OF SAID BODY INCLUDING AN AREA UNDERLYING SAID ANODE, THE CONCENTRATION OF SAID ELEMENT NOT EXCEEDING 1% BY WEIGHT OF THE CERAMIC, SAID ELEMENT IN SAID COMPOUND BEING CAPABLE OF ACQUIRING ELECTRONS TO CHANGE TO A LOWER VALENCE STATE.
Claim 2
Dependent Claim
81 words
A CERAMIC CAPACITOR WHICH COMPRISES A CERAMIC DIELECTRIC BODY OF THE TITANATE TYPE, AN ANODE ELECTRODE ON A SURFACE OF SAID BODY, A BARRIER OF A COMPOUND CONTAINING AN ELEMENT OF A POSITIVE VALENCE OF FIVE OR MORE DISPOSED AT SAID SURFACE OF SAID BODY INCLUDING AN AREA UNDERLYING SAID ANODE, THE CONCENTRATION OF SAID ELEMENT NOT EXCEEDING 1% BY WEIGHT OF THE CERAMIC, SAID ELEMENT IN SAID COMPOUND BEING CAPABLE OF ACQUIRING ELECTRONS TO CHANGE TO A LOWER VALENCE STATE.
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) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |