Patent US3213711A successfully refreshed from Google Patents.
Patent US3732587A successfully refreshed from Google Patents.
US3732587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight vehicle
Assignee: Individual
•
Filing: 1971-08-13
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Granted: 1973-05-15
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Expires: 1991-08-13
Abstract
Abstract A lightweight vehicle constructed from a portion of styrofoam material sandwiched between a pair of stiff outer members held together by a plurality of straps made from non-rusting material wrapped around the outer surface of the stiff members and the styrofoam material.
Inventors
- 👤 H Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:34
CPC Classifications
B; B63; B63B; B63B5/00; B63B5/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
A boat constructed from a piece of expanded polystyrene material sandwiched between a pair of plywood outer members, said boat comprising a block of styrofoam having preformed configuration with generally flat upper and lower surfaces, a first plywood member forming the upper deck of said boat and conforming to the upper surface peripheral configuration of said block, a second plywood member forming the bottom of said boat and conforming to the bottom peripheral configuration of said block, and a plurality of stainless steel bands having the ends thereof crimped together forming continuous bands encircling the exterior of said pair of plywood members and said polystyrene material disposed there between for binding said members and said material into a sandwich having the plywood members forming the upper and lower surfaces of said boat to protect the material sandwiched between the plywood members from damage by the passengers occupying boat''s upper deck and from damage to the lower surface by rocks and other hard objects with which the bottom of the boat may come into contact.
Claim 2
Dependent Claim
174 words
A boat constructed from a piece of expanded polystyrene material sandwiched between a pair of plywood outer members, said boat comprising a block of styrofoam having preformed configuration with generally flat upper and lower surfaces, a first plywood member forming the upper deck of said boat and conforming to the upper surface peripheral configuration of said block, a second plywood member forming the bottom of said boat and conforming to the bottom peripheral configuration of said block, and a plurality of stainless steel bands having the ends thereof crimped together forming continuous bands encircling the exterior of said pair of plywood members and said polystyrene material disposed there between for binding said members and said material into a sandwich having the plywood members forming the upper and lower surfaces of said boat to protect the material sandwiched between the plywood members from damage by the passengers occupying boat''s upper deck and from damage to the lower surface by rocks and other hard objects with which the bottom of the boat may come into contact.
Claim 3
Dependent Claim
153 words
The boat of claim 1 including an intermediate plywood member sandwiched between said first and second plywood members and extending laterally outward from the sides of said block of styrofoam and having further blocks of styrofoam strapped to the bottom of said intermediate plywood member on opposite sides of said block of styrofoam and forming outrigger pontoons for stabilizing said boat, said further blocks of styrofoam having generally flat upper and lower surfaces and preformed configurations and further lower plywood members forming the bottoms of said pontoons and conforming to the bottom peripheral configuration of said blocks forming said pontoons, said blocks being strapped to the bottom of said intermediate plywood member by a plurality of stainless steel bands having the ends thereof crimped together forming continuous bands individually encircling the exterior of said blocks and said lower further plywood members of said pontoons and projecting through holes in said intermediate plywood member.
References Cited (Backward Citations)
US2975747A
Cited
US3115860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |