US2684725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressional wave guide system
Assignee: AT&T Inc
•
Filing: 1949-05-05
•
Granted: 1954-07-27
•
Expires: 1969-05-05
Abstract
No abstract record available.
Inventors
- 👤 Winston E Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:38
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/02; H01Q15/10; G; G10; G10K; G10K11/00; G10K11/18; G10K11/24
Claims Analysis
Total Claims: 0
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US2516056A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |