Patent US2559918A successfully refreshed from Google Patents.
US2559918A
Expired / Lapsed
US
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Marker buoy for air or surface craft
Assignee: Air Shields Inc
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Filing: 1947-02-10
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Granted: 1951-07-10
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Expires: 1967-02-10
Abstract
No abstract record available.
Inventors
- 👤 Grieb Benjamin Curtis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:49
CPC Classifications
B; B63; B63C; B63C7/00; B63C7/26; B63B; B63B45/00; B63B45/04; B63B2201/00; B63B2201/04; B63B2201/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191325670A
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GB213298A
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US2190531A
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US2352226A
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US2404681A
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US2397995A
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US2355013A
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US2357417A
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US2396960A
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US2418397A
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US2451107A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |