US2779003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric disc phase-shifter for waveguide
Assignee: Individual
•
Filing: 1950-09-25
•
Granted: 1957-01-22
•
Expires: 1970-09-25
Abstract
No abstract record available.
Inventors
- 👤 Philip J Allen
- 👤 John H Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/182; A; A47; A47G; A47G25/00; A47G25/90; A47G25/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR802756A
Cited
US2433368A
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US2426992A
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US2423150A
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US2505557A
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GB591369A
Cited
US2495170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |