US4221782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fish culture by stickleback population eradication
Assignee: Idaho Research Foundation Inc
•
Filing: 1978-04-03
•
Granted: 1980-09-09
•
Expires: 1998-04-03
Abstract
Abstract Control of stickleback in streams and other locales is achieved by selective addition of chemicals that form free azide radicals in water, specifically sodium azide and potassium azide. Subsequent deactivation, when desired, is achieved by addition of calcium compounds. High selectively to stickleback can be achieved with minimal risk to desirable game fish in the salmon and trout groups.
Inventors
- 👤 Craig MacPhee
- 👤 Fred F. Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:53
CPC Classifications
A; A01; A01K; A01K61/00; A01K61/10; A01N; A01N55/00; A01N59/00; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02A40/81; Y10; Y10S; Y10S424/00; Y10S424/09
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
A method of fish culture for control of the stickleback population in an aqueous habitat containing stickleback and at least one member selected from the group comprising sockeye salmon, chinook salmon, steelhead trout, rainbow trout, cutthroat trout, suckers, dace, shiners and sculpin, said method comprising: adding to the aqueous habitat a compound containing the azide radical and which dissociates or hydrolyzes to form a concentration of free azide radical in water from about 0.325 to 3.25 mg/l which is lethal to the stickleback, but not lethal to said selected members of said group.
Claim 2
Independent Claim
93 words
A method of fish culture for control of the stickleback population in an aqueous habitat containing stickleback and at least one member selected from the group comprising sockeye salmon, chinook salmon, steelhead trout, rainbow trout, cutthroat trout, suckers, dace, shiners and sculpin, said method comprising: adding to the aqueous habitat a compound containing the azide radical and which dissociates or hydrolyzes to form a concentration of free azide radical in water from about 0.325 to 3.25 mg/l which is lethal to the stickleback, but not lethal to said selected members of said group.
Claim 3
Dependent Claim
17 words
A method of fish culture as set out in claim 1 wherein the compound is sodium azide.
Claim 4
Dependent Claim
17 words
A method of fish culture as set out in claim 1 wherein the compound is potassium azide.
Claim 5
Dependent Claim
22 words
A method of fish culture as set out in claim 1 wherein the compound is an organic compound containing the azide radical.
Claim 6
Dependent Claim
16 words
A method of fish culture as set out in claim 1 wherein the compound is azidotrimethyl-silicane.
Claim 7
Dependent Claim
38 words
A method of fish culture as set out in claim 1 further comprising the step of subsequently treating the aqueous habitat with a calcium compound which dissociates in water and decreases the toxic effects of the azide radical.
Claim 8
Dependent Claim
15 words
A method as set out in claim 6 wherein the calcium compound is calcium iodide.
Claim 9
Dependent Claim
15 words
A method as set out in claim 6 wherein the calcium compound is calcium chloride.
Claim 10
Dependent Claim
33 words
A method of fish culture as set out in claim 1 further comprising the step of subsequently treating the aqueous habitat with stannous chloride to decrease the toxic effects of the azide radical.
References Cited (Backward Citations)
US3389685A
Cited
US4132780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |