US2580798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broad-band antenna system
Assignee: Individual
•
Filing: 1947-05-22
•
Granted: 1952-01-01
•
Expires: 1967-05-22
Abstract
No abstract record available.
Inventors
- 👤 Kolster Muriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2044779A
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US2188389A
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US2192532A
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US2311364A
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US2289856A
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FR879230A
Cited
US2268640A
Cited
US2287220A
Cited
US2297329A
Cited
US2380333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |