US2750488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swivel marker for elevated runway fixtures
Assignee: McGraw Electric Co
•
Filing: 1953-04-08
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Granted: 1956-06-12
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Expires: 1973-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Harold A Van Dusen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:32
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; F; F16; F16B; F16B2200/00; F16B2200/63; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32819; Y10T403/70; Y10T403/7041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1349392A
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US1394667A
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US1560572A
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GB325634A
Cited
US1876082A
Cited
US2103322A
Cited
US2535382A
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US2587838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |