US3886905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish propagation method
Assignee: Individual
•
Filing: 1973-10-04
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Granted: 1975-06-03
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Expires: 1993-10-04
Abstract
Abstract A method and apparatus for propagating fish from fish eggs. A layered deposit of fertilized eggs is prepared within a confined zone circumscribed by the walls of a tank. Eggs incubate in this layered deposit, with the production of alevins therefrom. The alevins are permitted to escape from the deposit downwardly to lodge on a tactile substrate conducive to the development of fish fry from the alevins. The fish fry may then escape from the tank. The incubation process is carried out with the exclusion of light. A support for the deposit of eggs may take the form of perforate trays radiating outwardly from a common mounting. The alevins escape through the perforations of the trays in their passage downwardly to the substrate where incubation of the alevins to produce fish fry takes place.
Inventors
- 👤 William J Mcneil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:52
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/10; A01K61/17; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method of propagating fish from fish eggs comprising preparing on a perforate support submerged in water a deposit of fertilized eggs, incubating the eggs in said deposit to produce alevins therefrom, which alevins include attached yolk sacs which are the remnants of the eggs from which the alevins were produced, allowing said alevins with attached yolk sacs to leave said support by escaping downwardly through the perforations of said support, permitting the alevins on escaping through said perforations to nestle within the interstices of a rugose substrate with the alevins sheltered about their sides by such substrate, and further incubating said alevins with such nestled in the interstices of said substrate during the period that yolk sacs are absorbed by said alevins to produce the fry.
Claim 2
Independent Claim
127 words
A method of propagating fish from fish eggs comprising preparing on a perforate support submerged in water a deposit of fertilized eggs, incubating the eggs in said deposit to produce alevins therefrom, which alevins include attached yolk sacs which are the remnants of the eggs from which the alevins were produced, allowing said alevins with attached yolk sacs to leave said support by escaping downwardly through the perforations of said support, permitting the alevins on escaping through said perforations to nestle within the interstices of a rugose substrate with the alevins sheltered about their sides by such substrate, and further incubating said alevins with such nestled in the interstices of said substrate during the period that yolk sacs are absorbed by said alevins to produce the fry.
Claim 3
Independent Claim
127 words
A method of propagating fish from fish eggs comprising preparing on a perforate support submerged in water a deposit of fertilized eggs, incubating the eggs in said deposit to produce alevins therefrom, which alevins include attached yolk sacs which are the remnants of the eggs from which the alevins were produced, allowing said alevins with attached yolk sacs to leave said support by escaping downwardly through the perforations of said support, permitting the alevins on escaping through said perforations to nestle within the interstices of a rugose substrate with the alevins sheltered about their sides by such substrate, and further incubating said alevins with such nestled in the interstices of said substrate during the period that yolk sacs are absorbed by said alevins to produce the fry.
Claim 4
Independent Claim
127 words
A method of propagating fish from fish eggs comprising preparing on a perforate support submerged in water a deposit of fertilized eggs, incubating the eggs in said deposit to produce alevins therefrom, which alevins include attached yolk sacs which are the remnants of the eggs from which the alevins were produced, allowing said alevins with attached yolk sacs to leave said support by escaping downwardly through the perforations of said support, permitting the alevins on escaping through said perforations to nestle within the interstices of a rugose substrate with the alevins sheltered about their sides by such substrate, and further incubating said alevins with such nestled in the interstices of said substrate during the period that yolk sacs are absorbed by said alevins to produce the fry.
Claim 5
Dependent Claim
24 words
The method of claim 1, wherein the incubation on said Perforate support and incubation on said substrate is performed in the absence of light.
Claim 6
Dependent Claim
45 words
The method of claim 1, wherein said support and said substrate are maintained in a zone circumscribed by a water impervious barrier, and water is circulated through said zone by directing such toward the base of such zone and thence upwardly to leave said zone.
Claim 7
Dependent Claim
17 words
The method of claim 3, wherein said zone is maintained in a condition closed off to light.
Claim 8
Dependent Claim
22 words
The method of claim 1, wherein an escape for developing fish fry is provided disposed above the level of said perforate support.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |