US3570257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dock and dolphin protector
Assignee: Energy Absorption Systems Inc
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Filing: 1968-09-17
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Granted: 1971-03-16
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Expires: 1988-09-17
Abstract
Abstract A PROTECTOR FOR FIXED MARINE STRUCTURES SUCH AS DOCKS, DOLPHINS, ETC., WHICH COMPRISES A MOVABLE SHAFT PIVOTALLY MOUNTED AT ONE END AND FREELY MOVABLE AT THE OTHER AND AT LEAST ONE NON-ENERGY STORING ENERGY ABSORBTION UNIT BETWEEN THE FIXED MARINE STRUCTURE AT THE SHAFT, THE ENERGY ABSORBING UNIT COMPRISING A PLURALITY OF HOLLOW BODIES FORMED OF MILDLY RESILIENT MATERIAL NORMALLY FILLED WITH WATER AND HAVING AN ORIFICE WHICH IS SIZED AND DISPOSED TO PERMIT ESCAPE OF WATER FROM THE BODY AT A LIMITED RATE COMMENSURATE WITH THE SEVERITY OF IMPACT OF A VESSEL AGAINST THE MOVABLE SHAFT IS DISCLOSED.
Inventors
- 👤 Grant W Walker
- 👤 Duane B Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:30
CPC Classifications
E; E02; E02B; E02B3/00; E02B3/20; E02B3/26; E02B3/28; Y; Y02; Y02A; Y02A30/00; Y02A30/30
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |