Patent US3871316A successfully refreshed from Google Patents.
US3871316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catamaran
Assignee: Woodall Industries Inc
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Filing: 1973-09-06
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Granted: 1975-03-18
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Expires: 1993-09-06
Abstract
Abstract A catamaran is made with two hollow plastic hulls. Each hull consists of two vacuum formed plastic sheets heat sealed together at a vertical peripheral flange. The flange is enlarged on the lower side of the hull to define a keel. A load supporting framework is mounted on the hulls.
Inventors
- 👤 Kenneth H Woodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:52
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24; B63B1/00; B63B1/02; B63B1/10; B63B1/12; B63B1/121; B63B3/00; B63B3/02; B63B3/08; B63B2003/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A catamaran comprising a pair of hollow plastic hulls each having a mounting portion provided with an opening therein, a stanchion mounted on each of said mounting portions over the opening thereof, mounting plate means disposed against the interior of each of said hulls in generally surrounding relation to said opening, said mounting plate means being insertable into said hulls through said openings, and fastening means extending between said stanchions and said mounting plate means in locations spaced around said opening to secure said stanchions to said mounting portions, said stanchions being operable to close said openings and being in sealed relation to said mounting portions around the openings thereof.
Claim 2
Dependent Claim
110 words
A catamaran comprising a pair of hollow plastic hulls each having a mounting portion provided with an opening therein, a stanchion mounted on each of said mounting portions over the opening thereof, mounting plate means disposed against the interior of each of said hulls in generally surrounding relation to said opening, said mounting plate means being insertable into said hulls through said openings, and fastening means extending between said stanchions and said mounting plate means in locations spaced around said opening to secure said stanchions to said mounting portions, said stanchions being operable to close said openings and being in sealed relation to said mounting portions around the openings thereof.
Claim 3
Dependent Claim
18 words
The structure set forth in claim 1 including gasket means positioned between said stanchions and said mounting portions.
Claim 4
Dependent Claim
24 words
The structure set forth in claim 1 including separate fasteners operable to hold said mounting plate means to the interior of said mounting portions.
Claim 5
Dependent Claim
36 words
The structure set forth in claim 1 in which said mounting plate means are provided with threaded openings and in which said fastening means comprise screws passing through said stanchions and threaded into said threaded openings.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |