US2965690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical capacitors
Assignee: Sprague Electric Co
•
Filing: 1958-01-10
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Granted: 1960-12-20
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Expires: 1978-01-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Petersen
- 👤 Sidney D Ross
- 👤 Finkelstein Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:12
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
AN ELECTROLYTIC CAPACITOR ELECTROLYTE CONSISTING ESSENTIALLY OF A SUBSTITUTED AMMONIUM SALT DISSOLVED IN A SOLVENT CONSISTING ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE CARBONATE, GAMMAVALEROLACTONE, AND BUTYROLACTONE.
Claim 2
Dependent Claim
31 words
AN ELECTROLYTIC CAPACITOR ELECTROLYTE CONSISTING ESSENTIALLY OF A SUBSTITUTED AMMONIUM SALT DISSOLVED IN A SOLVENT CONSISTING ESSENTIALLY OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF PROPYLENE CARBONATE, GAMMAVALEROLACTONE, AND BUTYROLACTONE.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |