US2768338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric variable condensers
Assignee: —
•
Filing: —
•
Granted: 1956-10-23
•
Expires: 1973-10-23
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:38
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/12; H01G5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US589725A
Cited
US1768313A
Cited
US1589204A
Cited
GB263948A
Cited
US1625698A
Cited
US1956403A
Cited
US2464716A
Cited
US2539932A
Cited
US2477688A
Cited
US2589092A
Cited
GB637290A
Cited
GB648223A
Cited
US2575726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |