Patent US2427670A successfully refreshed from Google Patents.
US2427670A
Expired / Lapsed
US
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Radio centercasting system
Assignee: Individual
•
Filing: 1941-12-06
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Granted: 1947-09-23
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Expires: 1961-12-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred N Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:23
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/29; H04H60/33; H04H60/76; H04H60/81; H04H60/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1990489A
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US2156061A
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US2188165A
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US2236298A
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US2265216A
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US2346869A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |