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US3501766A
Expired / Lapsed
US
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Variable directivity aerial of the slotted waveguide type
Assignee: BAE Systems Electronics Ltd
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Filing: 1966-07-27
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Granted: 1970-03-17
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Expires: 1986-07-27
Abstract
No abstract record available.
Inventors
- 👤 Mervyn James Crumpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:45
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2452349A
Cited
US2764756A
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US2996715A
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US2934762A
Cited
US3044067A
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US3018479A
Cited
US3377596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |