US2648720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open wire transmission line
Assignee: SURPRENANT Manufacturing Co
•
Filing: 1948-11-18
•
Granted: 1953-08-11
•
Expires: 1968-11-18
Abstract
No abstract record available.
Inventors
- 👤 Donald C Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:19
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US336992A
Cited
US1305247A
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GB104401A
Cited
US2149223A
Cited
US2204737A
Cited
US2186793A
Cited
US2230069A
Cited
US2431871A
Cited
US2466720A
Cited
US2543696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |