Patent US3535504A successfully refreshed from Google Patents.
US3535504A
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US
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High intensity runway inset light with shallow optical system
Assignee: EDWARD W BEAL
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Filing: 1968-03-06
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Granted: 1970-10-20
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Expires: 1988-03-06
Abstract
No abstract record available.
Inventors
- 👤 Edward W Beal
- 👤 William C Daley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:34
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; B64F1/205; E; E01; E01F; E01F9/00; E01F9/50; E01F9/553; E01F9/559
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |