US2667000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable folding airstrip marker
Assignee: JOHN L MITCHELL
•
Filing: 1951-05-15
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Granted: 1954-01-26
•
Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Hazel C O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:41
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; E; E01; E01F; E01F9/00; E01F9/60; E01F9/623; E01F9/654
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US355809A
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US397732A
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US1848734A
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US1624900A
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US1882150A
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US2264618A
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US2330096A
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US2410277A
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US2542894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |