Patent US3611459A successfully refreshed from Google Patents.
US3611459A
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US
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Composite boat
Assignee: Dunlop Holdings Ltd
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Filing: 1969-09-15
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Granted: 1971-10-12
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Expires: 1989-09-15
Abstract
Abstract A COMPOSITE BOAT COMPRISING A RIGID HULL HAVING AN INFLATABLE GUNWALE ATTACHED TO THE RIM OF THE HULL IN SUCH A MANNER THAT OVER A MAJOR PORTION OF THE LENGTH OF THE GUNWALE A PORTION OF THE GUNWALE PROJECTS OUTBOARD OF THE RIM OF THE HULL AND AT LEAST THE GREATER PART OF THE GUNWALE VOLUME LIES ABOVE THE RIM OF THE HULL. THE INFLATABLE GUNWALE IS PREFERABLY CONSTRUCTED WITH FLEXIBLE AIR CHAMBERS CONTAINED WITHIN AN OUTER SHAPE INDUCING PROTECTIVE COVERING OF RUBBERISED FABRIC.
Inventors
- 👤 Derek W Sear
- 👤 Ronald B Noad
- 👤 Peter Frank Panter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:54
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/06; F16B5/0692; B; B63; B63B; B63B3/00; B63B3/14; B63B3/38; B63B5/00; B63B5/24; B63B7/00; B63B7/06; B63B7/08; C; C10; C10G; C10G29/00; C10G29/20; C10G29/22; C10G29/24; E; E04; E04F; E04F13/00; E04F13/002; E04F13/07; E04F13/08; F16B4/00; F16B4/002; F16B2200/00; F16B2200/91; F16B3/00
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |