US2640105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave transmission system and method for synthesizing a given electrical characteristic
Assignee: AT&T Inc
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Filing: 1947-10-10
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Granted: 1953-05-26
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Expires: 1967-10-10
Abstract
No abstract record available.
Inventors
- 👤 William R Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:47
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/045; H03; H03H; H03H15/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |