US2740928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of electric capacitors
Assignee: —
•
Filing: —
•
Granted: 1956-04-03
•
Expires: 1973-04-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1563440A
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US1611756A
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US1784611A
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Cited
US2373639A
Cited
US2432950A
Cited
GB594224A
Cited
US2501563A
Cited
US2482329A
Cited
US2614524A
Cited
US2456241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |