US3138779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glide slope indicator
Assignee: Standard Parts and Equipment Corp
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Filing: 1962-07-25
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Granted: 1964-06-23
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Expires: 1982-07-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Doyle Murray
- 👤 Everett E Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:33
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; F; F21; F21V; F21V21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A GLIDE SLOPE INDICATOR COMPRISING: A HOUSING HAVING FORWARD AND REAR ENDS, MULTIPLE LIGHT FILTERS OF DIFFERENT COLORS WITHIN THE FORWARD END OF SAID HOUSING, SAID FILTERS BEING POSITIONED ONE ABOVE THE OTHER, A CONDENSING LENS MOUNTED WITHIN SAID HOUSING INWARDLY OF SAID FILTERS, OUTWARDLY DIVERGING GENERALLY HORIZONTAL BAFFLES ARRANGED ONE ABOVE THE OTHER IN THE FORWARD END OF SAID HOUSING AND HAVING THEIR INNER ENDS COINCIDING WITH THE UPPER AND LOWER EDGES OF SAID FILTERS, AND A LIGHT SOURCE WITHIN SAID HOUSING INWARDLY OF BOTH SAID FILTERS AND SAID LENS.
Claim 2
Dependent Claim
91 words
A GLIDE SLOPE INDICATOR COMPRISING: A HOUSING HAVING FORWARD AND REAR ENDS, MULTIPLE LIGHT FILTERS OF DIFFERENT COLORS WITHIN THE FORWARD END OF SAID HOUSING, SAID FILTERS BEING POSITIONED ONE ABOVE THE OTHER, A CONDENSING LENS MOUNTED WITHIN SAID HOUSING INWARDLY OF SAID FILTERS, OUTWARDLY DIVERGING GENERALLY HORIZONTAL BAFFLES ARRANGED ONE ABOVE THE OTHER IN THE FORWARD END OF SAID HOUSING AND HAVING THEIR INNER ENDS COINCIDING WITH THE UPPER AND LOWER EDGES OF SAID FILTERS, AND A LIGHT SOURCE WITHIN SAID HOUSING INWARDLY OF BOTH SAID FILTERS AND SAID LENS.
References Cited (Backward Citations)
US2498294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |