US2430990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling transformer for radiofrequency selectors
Assignee: Motorola Solutions Inc
•
Filing: 1944-07-01
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Granted: 1947-11-18
•
Expires: 1964-07-01
Abstract
No abstract record available.
Inventors
- 👤 Moore William Cullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/0153; H03H7/0161; H03H7/0169; H03H7/0184
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB425296A
Cited
US2035439A
Cited
US2130815A
Cited
US2177842A
Cited
US2168351A
Cited
US2176064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-17 | 1951-05-19 | 1951-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-17 | 1955-05-19 | 1955-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-17 | 1959-05-19 | 1959-11-18 | $7700.00 | Window Closed / Lapsed |