US3431996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle guidance system
Assignee: National Research Development Corp UK
•
Filing: 1965-09-20
•
Granted: 1969-03-11
•
Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Cyril George Giles
- 👤 James Alexander Martin
- 👤 John Richard Spindlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:19
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0259; G05D1/0265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2540150A
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US3009525A
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US2929019A
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US3033305A
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US3235024A
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US3247740A
Cited
US3249175A
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US3258082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |