US2920255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum variable capacitor
Assignee: Jennings Radio Manufacturing Corp
•
Filing: 1956-03-12
•
Granted: 1960-01-05
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Harold A Luft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:15
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/02; H01G5/00; H01G5/01; H01G5/04; H01G5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR851088A
Cited
US2170695A
Cited
DE889654C
Cited
US2511338A
Cited
US2533713A
Cited
GB638857A
Cited
US2556846A
Cited
US2740077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |