US2961620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifter for high frequency transmission line
Assignee: Lockheed Martin Corp
•
Filing: 1955-10-06
•
Granted: 1960-11-22
•
Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 Donald J Sommers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:12
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H01P3/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2126541A
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US2427110A
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US2502359A
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US2475198A
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US2644140A
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US2513393A
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US2705776A
Cited
US2765447A
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US2695385A
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US2810892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |