US2900579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tantalum wire capacitors
Assignee: Sprague Electric Co
•
Filing: 1954-10-04
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Granted: 1959-08-18
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Donald G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/008; H01G9/012; Y; Y10; Y10T; Y10T29/00; Y10T29/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A MINIATURE ELECTROLYTIC CAPACITOR HAVING A CAPACITANCE MEASURED IN MICROFARADS, A TUBULAR SILVER CAN OF THE ORDER OF 1/8 INCH IN DIAMETER, 1/2 INCH IN LENGTH AND 6 MILS IN THICKNESS, A STRAIGHT TANTALUM ANODE AXIALLY POSITIONED IN SAID CAN COMPOSED OF A WIRE OF 10 TO 50 MILS IN DIAMETER, AN ETCHED SURFACE ON SAID STRAIGHT WIRE ANODE PROVIDING AN ANODE SURFACE TO SAID CAPACITOR WHEREBY SAID MINIATURE CAPACITOR HAS SAID CAPACITANCE, AN ELECTROLYTE IN SAID CAN OCCUPYING A VOLUME SUBSTANTIALLY GREATER THAN THE VOLUME OCCUPIED BY SAID TANTALUM WIRE
Claim 2
Dependent Claim
92 words
IN A MINIATURE ELECTROLYTIC CAPACITOR HAVING A CAPACITANCE MEASURED IN MICROFARADS, A TUBULAR SILVER CAN OF THE ORDER OF 1/8 INCH IN DIAMETER, 1/2 INCH IN LENGTH AND 6 MILS IN THICKNESS, A STRAIGHT TANTALUM ANODE AXIALLY POSITIONED IN SAID CAN COMPOSED OF A WIRE OF 10 TO 50 MILS IN DIAMETER, AN ETCHED SURFACE ON SAID STRAIGHT WIRE ANODE PROVIDING AN ANODE SURFACE TO SAID CAPACITOR WHEREBY SAID MINIATURE CAPACITOR HAS SAID CAPACITANCE, AN ELECTROLYTE IN SAID CAN OCCUPYING A VOLUME SUBSTANTIALLY GREATER THAN THE VOLUME OCCUPIED BY SAID TANTALUM WIRE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |