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Patent US3471857A successfully refreshed from Google Patents.
US3471857A
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Planar array antenna arrangements
Assignee: Singer General Precision Inc
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Filing: 1967-05-24
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Granted: 1969-10-07
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Expires: 1987-05-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:17
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/02; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4409; H01Q13/00; H01Q13/10; H01Q13/12; H01Q13/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2981948A
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US3078463A
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US3083362A
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US3293647A
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US3281851A
Cited
US3243804A
Cited
US3247512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |