US2445896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric wave guide coupling arrangement for use in two-way signaling systems
Assignee: AT&T Inc
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Filing: 1945-03-06
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Granted: 1948-07-27
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Expires: 1965-03-06
Abstract
No abstract record available.
Inventors
- 👤 Warren A Tyrrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:41
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19; H01P5/22; H01P5/227; H01P5/08; H03; H03H; H03H7/00; H03H7/48; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2364371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |