US3447129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft depth-of-flash optical guidance system
Assignee: HENRY P BIRMINGHAM
•
Filing: 1966-06-17
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Granted: 1969-05-27
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Expires: 1986-06-17
Abstract
No abstract record available.
Inventors
- 👤 Henry P Birmingham
- 👤 Barbour Lee Perry
- 👤 Alan W Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:40
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN OPTICAL GUIDANCE SYSTEM FOR ENABLING THE PILOT OF A VEHICLE TO DIRECT THE VEHICLE TO FOLLOW A PREDETERMINED COURSE TO A POINT OF REFERENCE, COMPRISING: LIGHT PROJECTION MEANS AT SAID POINT OF REFERENCE FOR PROJECTING A MULTICOLORED LIGHT PATTERN, AND PATTERN CHARACTERIZING MEANS DISPOSED IN THE PATH OF SAID PROJECTED LIGHT PATTERN AND OPERABLE UPON SAID PATTERN TO ESTABLISH ITS CHARACTERISTIC SO THAT A PREDETERMINED ONE OF SAID LIGHT COLORS APPEARS STEADY TO THE PILOT WHEN THE VEHICLE IS ON SAID PREDETERMINED COURSE WHILE THE OTHERS OF SAID COLORS APPEAR
Claim 2
Dependent Claim
91 words
AN OPTICAL GUIDANCE SYSTEM FOR ENABLING THE PILOT OF A VEHICLE TO DIRECT THE VEHICLE TO FOLLOW A PREDETERMINED COURSE TO A POINT OF REFERENCE, COMPRISING: LIGHT PROJECTION MEANS AT SAID POINT OF REFERENCE FOR PROJECTING A MULTICOLORED LIGHT PATTERN, AND PATTERN CHARACTERIZING MEANS DISPOSED IN THE PATH OF SAID PROJECTED LIGHT PATTERN AND OPERABLE UPON SAID PATTERN TO ESTABLISH ITS CHARACTERISTIC SO THAT A PREDETERMINED ONE OF SAID LIGHT COLORS APPEARS STEADY TO THE PILOT WHEN THE VEHICLE IS ON SAID PREDETERMINED COURSE WHILE THE OTHERS OF SAID COLORS APPEAR
References Cited (Backward Citations)
US3191146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |