US2740927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum variable condenser
Assignee: Jennings Radio Manufacturing Corp
•
Filing: 1952-12-31
•
Granted: 1956-04-03
•
Expires: 1972-12-31
Abstract
No abstract record available.
Inventors
- 👤 Jennings Jo Emmett
- 👤 Lewis B Steward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2192062A
Cited
US2230125A
Cited
US2339663A
Cited
US2358200A
Cited
US2447719A
Cited
US2451557A
Cited
GB589728A
Cited
US2511338A
Cited
US2558357A
Cited
GB638857A
Cited
US2556846A
Cited
US2575726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 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 |