Patent US2902177A successfully refreshed from Google Patents.
US2902177A
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Block stowage means for derricks
Assignee: American Hoist and Derrick Co
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Filing: 1956-10-08
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Granted: 1959-09-01
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Robert J Stoddard
- 👤 Archer W Brown
- 👤 Harry T Bratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:27
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/64; B66C23/66
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |