US2531438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple distribution radio receiving system
Assignee: Individual
•
Filing: 1947-03-21
•
Granted: 1950-11-28
•
Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 William J Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:51
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/53; H04H20/61; H04H20/63; H03; H03H; H03H7/00; H03H7/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2094360A
Cited
US1976910A
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US2000190A
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US2148098A
Cited
US2129075A
Cited
US2203746A
Cited
US2229043A
Cited
US2401205A
Cited
US2408032A
Cited
US2408271A
Cited
US2394917A
Cited
US2423416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |