US3588627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leadless solid electrolyte tantalum capacitor
Assignee: Sprague Electric Co
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Filing: 1969-04-10
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Granted: 1971-06-28
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Expires: 1989-04-10
Abstract
Abstract A SOLID ELECTROLYTE TANTALUM CAPACITOR IS PROVIDED WHEREIN THE WIRE CONNECTIN TO THE TANTALUM SINTERED PELLET IS ELIMINATED. A PORTION OF THE PELLET IS RENDERED NONPOROUS TO ANODIZING SOLUTIONS AND SEMICONDUCTOR DEPOSITION SOLUTIONS. FOLLOWING FORMATION OF OXIDE AND SOLID ELECTROLYTE DEPOSITION, THE NONPOROUS AREA IS EXPOSED, REANODIZED, AND REEXPOSED TO FORM A SEPARATING MARGIN AND THE ANODE CONNECTION MADE DIRECTLY TO THIS REEXPOSED NONPOROUS AREA OF THE PELLET.
Inventors
- 👤 Mark Markarian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:16
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/008; H01G9/012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |