Patent US3516623A successfully refreshed from Google Patents.
US3516623A
Expired / Lapsed
US
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Station keeping system
Assignee: AT&T Inc
•
Filing: 1966-09-14
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Granted: 1970-06-23
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Expires: 1986-09-14
Abstract
No abstract record available.
Inventors
- 👤 Frank W Sinden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:13
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/24; B64G1/26; B64G1/242; B64G1/2429
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1853233A
Cited
US2960294A
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US3073550A
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US2963245A
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US3056565A
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US3180084A
Cited
US3258223A
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US3421715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |