Patent US3528072A successfully refreshed from Google Patents.
US3528072A
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Aerial systems having plural lenses,selectable for delay correction
Assignee: EMI Ltd
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Filing: 1968-02-15
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Granted: 1970-09-08
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Expires: 1988-02-15
Abstract
No abstract record available.
Inventors
- 👤 Samuel William Pickering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:10
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2599864A
Cited
US3005983A
Cited
US3004259A
Cited
US3311917A
Cited
US3286260A
Cited
US3413640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |