Patent US3879782A successfully refreshed from Google Patents.
US3879782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfboard with removable tail surface area portion
Assignee: Individual
•
Filing: 1973-08-06
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Granted: 1975-04-29
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Expires: 1993-08-06
Abstract
Abstract An improved surfboard having a cut out in the tail block portion. The periphery of the cut out is provided with a grooved slot. A removable tail surface portion is provided which includes a flange for removably mating with the periphery of the cut out portion of the tail block so as to form a unitary surfboard structure. A removable pin for locking together the tail surface portion to the tail block portion while the same are mated is provided.
Inventors
- 👤 Clifford Clinton Oliver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:12
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/60; B63B32/64
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
An improved surfboard comprising: a unitary surfboard structure having a tail block portion with a cut away tip surface area; a plurality of differently configured tail block tip surface area sections; mating means for removably mating any selected one of said plurality of said tip surface area sections to said cut away tip surface area of said surfboard so as to provide a tip surface area of desired configuration to said surfboard; and removable locking means for locking the mated one of said plurality of tip surface area sections to said surfboard; said cut away tip surface area is substantially ''''V'''' shaped; said mating means comprises a slotted channel on the rear periphery of said tail block portion and each of said plurality of tip surface area sections include a flange for mating within said slotted channel. 2. The invention as defined in claim 1 wherein each side of the outer surface of said ''''V'''' forms an equal acute angle with the center line of said surfboard.
Claim 2
Dependent Claim
64 words
The invention as defined in claim 1 wherein said removable locking means comprises in combination apertures passing through said tail block portion and each of said tip surface area sections, said apertures are coaxial when said tail block portion and a selected one of said tip surface area sections are mated, and a removable pin passing through said apertures for maintaining a mated configuration.
Claim 3
Dependent Claim
22 words
The invention as defined in claim 3 wherein said apertures are threaded and said pin is threaded for threaded engagement there with.
Claim 4
Dependent Claim
21 words
The invention as defined in claim 1 wherein one of said plurality of tip surface area sections is substantially diamond shaped.
Claim 5
Dependent Claim
22 words
The invention as defined in claim 1 wherein one of said plurality of tip surface area sections has a convex outer periphery.
Claim 6
Dependent Claim
37 words
The invention as defined in claim 1 wherein one of said plurality of tip surface area sections has an outer periphery comprised of at least two curved portions in contact at the center line of said surfboard.
Claim 7
Dependent Claim
28 words
The invention as defined in claim 1 wherein one of said plurality of tip surface sections has an outer periphery with an elongated portion on one side thereof.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |