Patent US3561402A successfully refreshed from Google Patents.
US3561402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial refuge reef for fish
Assignee: Asahi Kasei Corp
•
Filing: 1968-11-20
•
Granted: 1971-02-09
•
Expires: 1988-11-20
Abstract
Abstract An artificial reef for fish comprises a hollow tubular body with opposite open ends and constituted of a synthetic resinous substance mixed with inorganic substances so that the apparent specific gravity of the body is at least 1.1. The body is constituted by a single plate when bent to cylindrical form and connected at its ends, and a plurality of plates when of prismatic form, the plates being connected at adjacent ends by means of rings. In the case of a rectangular prism which is collapsible, internal supporting plates are used to hold the tubular body in operative state, the supporting plates being of starlike shape with apex portions engaged in cooperating openings in each of the plates.
Inventors
- 👤 Shinichi Ishida
- 👤 Takatsugu Kawano
- 👤 Chiaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:20
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/70; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
102 words
An artificial refuge reef for fish comprising a hollow tubular body with opposite ends and constituted of a homogeneous synthetic resinous substance, said body having an apparent specific gravity of at least 1.1, means in said body to permit collapse thereof, and stabilizing means for engaging said body to hold the same in an operative position in which the body is tubular, said stabilizing means comprising a plurality of interior supports spaced along the length of the tubular body, said supports and tubular body providing aperture means therethrough of a size to define fish passages through the body and past each support.
Claim 2
Dependent Claim
102 words
An artificial refuge reef for fish comprising a hollow tubular body with opposite ends and constituted of a homogeneous synthetic resinous substance, said body having an apparent specific gravity of at least 1.1, means in said body to permit collapse thereof, and stabilizing means for engaging said body to hold the same in an operative position in which the body is tubular, said stabilizing means comprising a plurality of interior supports spaced along the length of the tubular body, said supports and tubular body providing aperture means therethrough of a size to define fish passages through the body and past each support.
Claim 3
Dependent Claim
18 words
An artificial reef according to claim 1, wherein said body is provided with a number of perforated openings.
Claim 4
Dependent Claim
40 words
An artificial reef according to claim 1, wherein said tubular body is a prism constituted by a plurality of plates having adjoining edges, said means to permit collapse of the body comprising connecting rings joining said plates at said edges.
Claim 5
Dependent Claim
36 words
An artificial reef according to claim 3, wherein said tubular body is a rectangular prism and said supports are starlike supporting plate members having apex portions engaged in cooperating openings provided in each of said plates.
Claim 6
Dependent Claim
24 words
An artificial reef according to claim 4, wherein said aperture means is constituted as openings in the central portion of the supporting plate members.
Claim 7
Dependent Claim
23 words
An artificial reef according to claim 5, wherein each apex portion includes a pair of projections engageable in respective openings in adjacent plates.
Claim 8
Dependent Claim
18 words
An artificial reef according to claim 1, wherein said aperture means is constituted as openings in the supports.
Claim 9
Dependent Claim
24 words
An artificial reef according to claim 1 comprising an inorganic substance mixed with the resinous substance to raise the apparent specific gravity to 1.1.
Claim 10
Dependent Claim
19 words
An artificial reef according to claim 8, wherein said inorganic substance is metal, glass, sand, clay, talc or silica.
Claim 11
Dependent Claim
25 words
An artificial reef according to claim 1, wherein said supports are skeletonized and said aperture means is formed between the tubular body and said supports.
References Cited (Backward Citations)
US2611337A
Cited
FR1358569A
Cited
US3314396A
Cited
US3324590A
Cited
US3304912A
Cited
US3347210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |