US2477693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable induction coil
Assignee: Radio Patents Corp
•
Filing: 1946-11-02
•
Granted: 1949-08-02
•
Expires: 1966-11-02
Abstract
No abstract record available.
Inventors
- 👤 Guanella Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786578A
Cited
AT70404B
Cited
US1517570A
Cited
GB292955A
Cited
US2095420A
Cited
US2137392A
Cited
US2268850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |