US2503100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustably tuned coupling unit
Assignee: RCA Corp
•
Filing: 1945-08-24
•
Granted: 1950-04-04
•
Expires: 1965-08-24
Abstract
No abstract record available.
Inventors
- 👤 Wallace W Dewhurst
- 👤 Paul R Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:57
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1935354A
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US2035439A
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GB444013A
Cited
US2130815A
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US2180413A
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US2135841A
Cited
US2176064A
Cited
US2222770A
Cited
US2291787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |