US2709053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic approach system
Assignee: Unisys Corp
•
Filing: 1952-05-14
•
Granted: 1955-05-24
•
Expires: 1972-05-14
Abstract
No abstract record available.
Inventors
- 👤 Cecil C Pine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:33
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0653; G05D1/0676
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE16181E
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US1568974A
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US2499349A
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US2393624A
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US2489248A
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US2595250A
Cited
US2620148A
Cited
US2613351A
Cited
US2611128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |