Patent US4377273A successfully refreshed from Google Patents.
Patent US3226057A successfully refreshed from Google Patents.
US3226057A
Expired / Lapsed
US
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Automatic control system for navigating a vehicle toward an isolated reference point
Assignee: Individual
•
Filing: 1951-05-21
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Granted: 1965-12-28
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Expires: 1971-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert G Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:43
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/2246; F41G7/2273; F41G7/2286
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
IN AN APPARATUS FOR NAVIGATING AIRCRAFT AND THE LIKE TOWARD AN ISOLATED REFERENCE POINT, MEANS CARRIED BY THE AIRCRAFT FOR PRODUCING CONTINUOUSLY AN IMAGE OF THE REFERENCE POINT ON A CONTRASTING BACKGROUND, SAID MEANS INDICATING THE RELATIVE POSITION AND MOVEMENT OF THE AIRCRAFT AND REFERENCE POINT, A PLATE CHANGING UNIFORMLY IN DENSITY RADIALLY FROM A SUBSTANTIALLY CENTRAL POINT, SAID PLATE BEING OF OPPOSITE CONTRAST TO THE IMAGE, SAID IMAGE AND PLATE BEING SUPERIMPOSED, MEANS ASSOCIATED WITH THE PLATE RE-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |