US4160033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the control of mosquitos by the use of film-forming materials
Assignee: United States Department of the Navy
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Filing: 1977-01-31
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Granted: 1979-07-03
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Expires: 1997-01-31
Abstract
Abstract A method of controlling mosquitos by adsorbing onto the surface of a body of water suitable for breeding mosquitos a monomolcular or duplex film of an organic material which reduces the surface tension of the body of water to 30 dynes/cm or less.
Inventors
- 👤 William D. Garrett
- 👤 William R. Barger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:28
CPC Classifications
A; A01; A01N; A01N31/00; A01N31/02; A01N37/00; A01N37/12; A01N43/00; A01N43/90; A01N61/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A method for eradicating mosquitos by applying to a body of water containing immature forms of mosquitos, in an amount sufficient to provide and maintain an approximately monomolecular film of a nonionic, autophobic, organic material with a density less than that of water, a boiling point of 170° C. or higher, a freezing point of less than 5° C., an HLB number of 10 or less, a bulk viscosity of less than 1000 centistokes at the temperature of use, a spreading velocity of 10 cm/sec for the first 100 cm, and a surface tension effectiveness which lowers the surface tension of said body of water to 30 dynes/cm or less.
Claim 2
Independent Claim
110 words
A method for eradicating mosquitos by applying to a body of water containing immature forms of mosquitos, in an amount sufficient to provide and maintain an approximately monomolecular film of a nonionic, autophobic, organic material with a density less than that of water, a boiling point of 170° C. or higher, a freezing point of less than 5° C., an HLB number of 10 or less, a bulk viscosity of less than 1000 centistokes at the temperature of use, a spreading velocity of 10 cm/sec for the first 100 cm, and a surface tension effectiveness which lowers the surface tension of said body of water to 30 dynes/cm or less.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said material has a bulk viscosity of 200 centistokes or less at the temperature of use and a boiling point of 200° C. or more.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said material is applied in an amount sufficient to provide a surface concentration from about 2 μl/m 2 to 80 μl/m 2 .
Claim 5
Dependent Claim
68 words
The method of claim 1 wherein said material has a boiling point of 200° C. or higher, an HLB number of 6 or less, a bulk viscosity of less than 200 centistokes, and a spreading velocity of 14 cm/sec for the first 100 cm and said material is added in an amount sufficient to provide a surface concentration from about 2 μl/m 2 to 40 μl/m 2 .
Claim 6
Dependent Claim
93 words
The method of claim 1 wherein said material is selected from the class consisting of sorbitan monooleate; a solution of 70 volume percent to less than 100 volume percent of sorbitan monooleate and 2-ethyl butanol; saturated, branched-chain alcohols with a carbon total from 15 to 19 carbon atoms, and one to three oxyethylene groups; unsaturated cis-alcohols with a 15 to 19 carbon atom chain length; unsaturated ethers with a chain length of 12 to 18 carbon atoms and three to five oxyethylene groups; and oleyl ether with two oxyethylene groups and mixtures thereof.
Claim 7
Dependent Claim
72 words
The method of claim 1 wherein said material is selected from the class consisting of sorbitan monooleate; a solution of 75 volume percent of sorbitan monooleate; and 25 volume percent of 2-ethyl butanol, isostearyl alcohol with two oxyethylene groups; lauryl ether with four oxyethylene groups; a solution comprising 50 volume percent of sorbitan monooleate and 50 volume percent of lauryl ether with four oxyethylene groups; and oleyl ether with two oxyethylene groups.
Claim 8
Dependent Claim
17 words
The method of claim 1 which further comprises repeating the addition of said material every 24 hours.
References Cited (Backward Citations)
US3639255A
Cited
US3740419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |