US2793334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical condensers
Assignee: Sprague Electric Co
•
Filing: 1950-10-24
•
Granted: 1957-05-21
•
Expires: 1970-10-24
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
- 👤 Denis Harold J St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:27
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/12; H01G13/00; H01G13/04; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1497415A
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US1871492A
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US1934192A
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US2183550A
Cited
GB502039A
Cited
US2426609A
Cited
US2506446A
Cited
US2596134A
Cited
US2549770A
Cited
US2526688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |