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 08:09
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/30; H01G4/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1563440A
Cited
US1611756A
Cited
US1784611A
Cited
US2171231A
Cited
US2225855A
Cited
US2508500A
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 |