US3605415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater riser support structure
Assignee: Boeing North American Inc
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Filing: 1969-06-30
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Granted: 1971-09-20
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Expires: 1989-06-30
Abstract
Abstract A SHIP MOUNTED SUPPORT FOR AN UNDERWATER RISER IS DESCRIBED HAVING A PLURALITY OF TOWERS SURROUNDING THE UPPER END OF THE RISER AND CONNECTED THERETO BY CONSTANT TENSION WINCHES. CABLES FROM THE WINCHES PASS OVER TRAVELING IDLER PULLEYS WHICH ARE URGED UPWARDLY ON THE TOWERS TO ASSIST IN MAINTAINING A SUBSTANTIALLY CONSTANT UPWARDLY DIRECTED FORCE ON THE RISER.
Inventors
- 👤 John W Mohlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/002; E21B19/004; E21B17/00; E21B17/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |