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US2872568A
Expired / Lapsed
US
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Device for selective reception of electromagnetic waves
Assignee: Tesla AS
•
Filing: 1954-04-21
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Granted: 1959-02-03
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Expires: 1974-04-21
Abstract
No abstract record available.
Inventors
- 👤 Provaz Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/02; H04B7/04; H04B7/08; H04B7/0802; H04B7/0805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2059081A
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US2243118A
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US2447057A
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US2414111A
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US2495826A
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US2485576A
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US2685643A
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US2644885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |