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Patent US2541652A successfully refreshed from Google Patents.
US2541652A
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Self-propelled marine anchor
Assignee: Standard Oil Development Co
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Filing: 1947-04-11
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Granted: 1951-02-13
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Expires: 1967-04-11
Abstract
No abstract record available.
Inventors
- 👤 Lynn G Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:42
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/24; B63B21/22; B63B2021/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE257858C
Cited
US568982A
Cited
GB190408101A
Cited
US1012679A
Cited
US1081103A
Cited
US2361949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |