Patent US4228614A successfully refreshed from Google Patents.
US4228614A
Expired / Lapsed
US
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Floating pesticide dispenser
Assignee: Consolidated Fertilizers Ltd
•
Filing: 1979-02-22
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Granted: 1980-10-21
•
Expires: 1999-02-22
Abstract
Abstract A method and composition for dispensing through a slow release floating polymer a pesticide for destroying aqueous pests, especially mosquito larva. The polymer matrix which has a specific gravity of less than 1.0 so that it floats, may be shaped into any geometric design such as a thin strip or tape and is anchored by an attached weight having a specific gravity greater than 1.0. The floating polymer assures slow release of the insecticide in that it is not covered by debris or silt as would occur with a sinking polymer matrix. The floating matrix can be utilized wherever desirable in slow turnover or stagnant waters, such as in lakes, ponds, swamps, storm sewer catch basins and portable water containers such as rain barrels, and the like. The floating member generally can contain any pesticide for the elimination of any specific pests or insects. The polymer of the matrix is a copolymer of ethylene-vinyl acetate and/or an ethylene-propylene copolymer. Moreover, a coleachant or a porosigen may be utilized to assure continued release over a long period of time such as for one to three years.
Inventors
- 👤 Nathan F. Cardarelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2027; A01M1/2055; A01K; A01K63/00; A01K63/04; A01N; A01N25/00; A01N25/08; A01N25/10; A01N25/34; A01N47/00; A01N47/08; A01N47/10; A01N47/22; A01N55/00; A01N55/02; A01N55/04; A01N57/00; A01N57/10; C; C02; C02F; C02F1/00; C02F1/50; C02F1/68; C02F1/685
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
316 words
A floating pesticide dispenser, comprising: a floating thermosplastic dispenser containing a pesticide and having a density less than 1.0 grams per cc, said thermoplastic dispenser containing a thermoplastic copolymer selected from the group consisting of a copolymer of ethylene-vinyl acetate, a copolymer of ethylene-propylene, and combinations thereof, said ethylene-vinyl acetate copolymer having from about 60 to about 95 percent by weight of ethylene and a weight average molecular weight of from about 40,000 to about 400,000, said ethylene-propylene copolymer having from about 30 percent to about 80 percent by weight of ethylene, and a weight average molecular weight of about 50,000 to about 250,000, said dispenser containing a pesticide for use in an aqueous environment for destroying aquatic pests, said pesticide may be a compound having the formula R 3 S n X where R 3 is selected from the group consisting of an alkyl group having from 1 to 8 carbon atoms, an aryl group, and a substituted aryl group wherein said substituted group is an alkyl or an ester containing from 1 to 6 carbon atoms; X is selected from the group consisting of a halogen, an oxide, an alkoxy OR 1 where R 1 is an alkyl having from 1 to 12 carbon atoms, or an ##STR3## group where R" is an alkyl having from 1 to 12 carbon atoms, the amount of said pesticide ranging from about 2 parts to about 80 parts by weight per 100 parts of said thermoplastic copolymer when the pesticide is not of formula R 3 S n X and when said pesticide is said R 3 S n X compound, the amount of said R 3 S n X pesticide ranging from about 25 parts to about 75 parts per 100 parts of said copolymer, and a weighted anchor, said weighted anchor connected to said dispenser and said pesticide being slowly released from said thermoplastic dispenser.
Claim 2
Dependent Claim
316 words
A floating pesticide dispenser, comprising: a floating thermosplastic dispenser containing a pesticide and having a density less than 1.0 grams per cc, said thermoplastic dispenser containing a thermoplastic copolymer selected from the group consisting of a copolymer of ethylene-vinyl acetate, a copolymer of ethylene-propylene, and combinations thereof, said ethylene-vinyl acetate copolymer having from about 60 to about 95 percent by weight of ethylene and a weight average molecular weight of from about 40,000 to about 400,000, said ethylene-propylene copolymer having from about 30 percent to about 80 percent by weight of ethylene, and a weight average molecular weight of about 50,000 to about 250,000, said dispenser containing a pesticide for use in an aqueous environment for destroying aquatic pests, said pesticide may be a compound having the formula R 3 S n X where R 3 is selected from the group consisting of an alkyl group having from 1 to 8 carbon atoms, an aryl group, and a substituted aryl group wherein said substituted group is an alkyl or an ester containing from 1 to 6 carbon atoms; X is selected from the group consisting of a halogen, an oxide, an alkoxy OR 1 where R 1 is an alkyl having from 1 to 12 carbon atoms, or an ##STR3## group where R" is an alkyl having from 1 to 12 carbon atoms, the amount of said pesticide ranging from about 2 parts to about 80 parts by weight per 100 parts of said thermoplastic copolymer when the pesticide is not of formula R 3 S n X and when said pesticide is said R 3 S n X compound, the amount of said R 3 S n X pesticide ranging from about 25 parts to about 75 parts per 100 parts of said copolymer, and a weighted anchor, said weighted anchor connected to said dispenser and said pesticide being slowly released from said thermoplastic dispenser.
Claim 3
Dependent Claim
40 words
A floating pesticide dispenser according to claim 1, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate; 2-(1-methylethoxy) phenol methylcarbamate; O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate; or O,O-dimethyl phosphorodithioate ester of diethyl mercaptosuccinate, and said R 3 S n X compound.
Claim 4
Dependent Claim
62 words
A floating pesticide dispenser according to claim 2 further including in said dispenser a low density polyethylene thermoplastic, said polyethylene having a molecular weight of from about 100,000 to about 400,000 and existing in an amount of from about 30 percent to about 75 percent based upon the total weight of said polyethylene and said ethylene-vinyl acetate copolymer or said ethylene-propylene copolymer.
Claim 5
Dependent Claim
154 words
A floating pesticide dispenser according to claim 1, 2, or 3, including a porosity inducing agent, the amount of said porosity inducing agent ranging from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of said porosity inducing agent ranging from about 15 to about 70 parts by weight per 100 parts of copolymer when said pesticide is said R 3 S n X compound, said porosity inducing agent being selected from the group consisting of an oxide and a salt, said oxide and salt having a cation selected from the class consisting of the alkaline metals, the alkaline earth metals, ammonium, iron, zinc, nickel, silver, and tin, and said salt having an anion selected from the class consisting of a carbonate, bicarbonate, nitrate, nitrite, nitride, peroxide, phosphate, phosphite, phosphide, sulfate, sulfite, and sulfide.
Claim 6
Dependent Claim
25 words
A floating pesticide dispenser according to claim 4 wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodo-p-phenylene phosphorothioate, tributyltin oxide, and tributyltin fluoride.
Claim 7
Dependent Claim
71 words
A floating pesticide dispenser according to claim 5, including from about 0.2 to about 25 parts by weight of a high solubility porosity inducing agent, said high solubility porosity inducing agent selected from the group consisting of the halogenated alkaline metals, the halogenated alkaline earth metals, halogenated iron, halogenated nickel, halogenated zinc, halogenated tin, halogenated silver, ammonium bromide, ammonium carbonate, ammonium chlorate, ammonium chloride, ammonium fluoride, ammonium sulfate, and the like.
Claim 8
Dependent Claim
99 words
A floating pesticide dispenser according to claim 5 wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, magnesium sulfide, magnesium phosphides, magnesium oxide, calcium carbonate, calcium bicarbonate, calcium nitride, calcium oxide, calcium phosphate, calcium phosphite, calcium sulfide, calcium sulfite, barium carbonate, barium nitride, barium peroxide, barium phosphate, barium sulfate, barium sulfite, iron carbonate, iron sulfate, iron sulfide, iron sulfite, nickel carbonate, nickel sulfide, zinc carbonate, zinc oxide, zinc sulfide, zinc sulfite, tin oxide, tin sulfide, silver carbonate, silver oxide, silver sulfide, silver sulfite, lithium phosphate, beryllium oxide, strontium carbonate, strontium sulfate, and strontium sulfite.
Claim 9
Dependent Claim
41 words
A floating pesticide dispenser according to claim 7 wherein the melt flow index of said ethylene-vinyl acetate copolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45.
Claim 10
Dependent Claim
64 words
A floating pesticide dispenser according to claim 8, wherein said ethylene-vinyl acetate copolymer contains from about 80 to about 93 percent ethylene and has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer contains from about 45 percent to about 75 percent by weight of ethylene and has a molecular weight of from about 100,000 to about 200,000.
Claim 11
Dependent Claim
56 words
A floating pesticide dispenser according to claim 9, wherein the amount of said tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate pesticide ranges from about 5 to about 20 parts per 100 parts of said copolymer, and wherein the amount of said tributyltin oxide and said tributyltinfluoride ranges from about 40 parts to about 70 parts per 100 parts of said copolymer.
Claim 12
Dependent Claim
29 words
A floating pesticide dispenser according to claim 10, wherein the weight of said anchor is from about 2 to about 10 times the total weight of said floating dispenser.
Claim 13
Dependent Claim
18 words
A floating pesticide dispenser according to claim 11, wherein a line connects said anchor and said floating dispenser.
Claim 14
Dependent Claim
99 words
A floating pesticide dispenser according to claim 10, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, calcium carbonate, ammonium sulfate, barium carbonate, iron carbonate, nickel carbonate, zinc carbonate, and strontium carbonate, and wherein the amount of said porosity inducing agent ranges from about 15 parts to about 35 parts by weight per 100 parts of copolymer when said pesticide is tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate and wherein the amount of said porosity inducing agent is from about 25 parts to about 60 parts by weight when said pesticide is said tributyltin oxide or said tributyltin fluoride.
Claim 15
Dependent Claim
17 words
A floating pesticide dispenser according to claim 13 wherein said floating dispenser has a plurality of strands.
Claim 16
Dependent Claim
16 words
A floating pesticide dispenser according to claim 13, wherein said porosity inducing agent is calcium carbonate.
Claim 17
Dependent Claim
17 words
A floating pesticide dispenser according to claim 15, wherein said floating dispenser has a plurality of strands.
Claim 18
Dependent Claim
26 words
A floating pesticide dispenser according to claim 4 wherein said anchor weighs from about 2 to about 10 times the total weight of said floating dispenser.
Claim 19
Dependent Claim
18 words
A floating pesticide dispenser according to claim 17, wherein a line connects said anchor and said floating dispenser.
Claim 20
Dependent Claim
17 words
A floating pesticide dispenser according to claim 4 wherein said floating dispenser has a plurality of strands.
Claim 21
Dependent Claim
99 words
A floating pesticide dispenser according to claim 4, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, magnesium sulfide, magnesium phosphides, magnesium oxide, calcium carbonate, calcium bicarbonate, calcium nitride, calcium oxide, calcium phosphate, calcium phosphite, calcium sulfide, calcium sulfite, barium carbonate, barium nitride, barium peroxide, barium phosphate, barium sulfate, barium sulfite, iron carbonate, iron sulfate, iron sulfide, iron sulfate, nickel carbonate, nickel sulfide, zinc carbonate, zinc oxide, zinc sulfide, zinc sulfite, tin oxide, tin sulfide, silver carbonate, silver oxide, silver sulfide, silver sulfite, lithium phosphate, beryllium oxide, strontium carbonate, strontium sulfate, and strontium sulfite.
Claim 22
Dependent Claim
64 words
A floating pesticide dispenser according to claim 20, wherein said ethylene-vinyl acetate copolymer contains from about 80 to about 93 percent ethylene and has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer contains from about 45 percent to about 75 percent by weight of ethylene and has a molecular weight of from about 100,000 to about 200,000.
Claim 23
Dependent Claim
99 words
A floating pesticide dispenser according to claim 21, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, calcium carbonate, ammonium sulfate, barium carbonate, iron carbonate, nickel carbonate, zinc carbonate, and strontium carbonate, and wherein the amount of said porosity inducing agent ranges from about 15 parts to about 35 parts by weight per 100 parts of said copolymer except for said R 3 S n X pesticide, the amount of said R 3 S n X pesticide ranging from about 25 parts to about 60 parts by weight per 100 parts of said copolymer.
Claim 24
Dependent Claim
69 words
A floating pesticide dispenser according to claim 1, 2, or 3 including from 1 to 60 parts of a high solubility porosity inducing agent, said porosity inducing agent selected from the group consisting of the halogenated alkaline metals, the halogenated alkaline earth metals, the halogenated iron, halogenated nickel, halogenated zinc, halogenated tin, halogenated silver, ammonium bromide, ammonium carbonate, ammonium chlorate, ammonium chloride, ammonium fluoride, ammonium sulfate, and the like.
Claim 25
Dependent Claim
102 words
A floating pesticide dispenser according to claim 1, 2, or 3, including a porosity inducing agent, the amount of said porosity inducing agent ranging from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of said porosity inducing agent ranging from about 15 to about 70 parts by weight per 100 parts of copolymer when said pesticide is said R 3 S n X compound, the solubility of said porosity inducing agent being 0.1 grams or less per 100 grams of water.
Claim 26
Dependent Claim
25 words
A floating pesticide dispenser according to claim 24, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, tributyltin fluoride, and tributyltin oxide.
Claim 27
Dependent Claim
73 words
A floating pesticide dispenser according to claim 25, wherein the melt flow index of said ethylene-vinyl acetate copolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45, wherein said ethylene-vinyl acetate copolymer has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer has a molecular weight of from about 100,000 to about 200,000.
Claim 28
Dependent Claim
26 words
A floating pesticide dispenser according to claim 26, wherein said anchor weighs from about 2 to about 10 times the total weight of said floating dispenser.
Claim 29
Dependent Claim
17 words
A floating pesticide dispenser according to claim 27, wherein said floating dispenser has a plurality of strands.
Claim 30
Dependent Claim
106 words
A floating pesticide dispenser according to claims 1, 2, or 3, including a high solubility porosity inducing agent, the amount of said porosity inducing agent ranging from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of porosity inducing agent ranging from about 15 to about 70 parts by weight per 100 parts of copolymer when said pesticide is said R 3 S n X compound, said porosity inducing agent having a solubility of about 0.1 grams to about 100 grams per 100 grams of water.
Claim 31
Dependent Claim
25 words
A floating pesticide dispenser according to claim 29, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, tributyltin fluoride, and tributyltin oxide.
Claim 32
Dependent Claim
73 words
A floating pesticide dispenser according to claim 30, wherein the melt flow index of said ethylene-vinyl acetate copolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45, wherein said ethylene-vinyl acetate copolymer has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer has a molecular weight of from about 100,000 to about 200,000.
Claim 33
Dependent Claim
26 words
A floating pesticide dispenser according to claim 31, wherein said anchor weighs from about 2 to about 10 times the total weight of said floating dispenser.
Claim 34
Dependent Claim
17 words
A floating pesticide dispenser according to claim 32, wherein said floating dispenser has a plurality of strands.
Claim 35
Dependent Claim
38 words
A process for destroying aquatic pests by the gradual and continued release of a pesticide for use in an aquatic environment from a floating thermoplastic dispenser, comprising applying said dispenser of said claim 1 to an aquatic environment.
Claim 36
Dependent Claim
184 words
A process according to claim 34, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, 2-(1-methylethoxy) phenol methylcarbamate; O,O-diethyl-O-(3,5,6-trichloro-2-pyridyl) phosphorothioate; or O,O-dimethyl phosphorodithioate ester of diethyl mercaptosuccinate, and a compound having the formula R 3 S n X where R 3 is selected from the group consisting of an alkyl group having from 1 to 8 carbon atoms, an aryl group, and a substituted aryl group wherein said substituted group is an alkyl or an ester containing from 1 to 6 carbon atoms; X is selected from the group consisting of a halogen, an oxide, an alkoxy OR 1 where R 1 is an alkyl having from 1 to 12 carbon atoms, or an ##STR4## group where R" is an alkyl having from 1 to 12 carbon atoms, the amount of said pesticide other than said R 3 S n X pesticide ranging from about 2 to about 80 parts per 100 parts of said copolymer, the amount of said R 3 S n X pesticides ranging from about 25 parts to about 75 parts per 100 parts of said copolymer.
Claim 37
Dependent Claim
63 words
A process according to claim 35, including the further step of adding a low density polyethylene thermoplastic to said dispenser, said polyethylene having a molecular weight of from about 100,000 to about 400,000 and existing in an amount of from about 35 to about 75 percent based upon the total weight of said polyethylene and said ethylene-vinyl acetate copolymer or said ethylene-propylene copolymer.
Claim 38
Dependent Claim
159 words
A process according to claim 34, 35, or 36, including the further step of adding a porosity inducing agent to said floating dispenser, the amount of said porosity inducing agent ranging from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of porosity inducing agent ranging from about 15 to about 75 parts by weight per 100 parts of copolymer when said pesticide is said R 3 S n X compound, said porosity inducing agent selected from the group consisting of an oxide and a salt, said oxide and salt having a cation selected from the group consisting of the alkaline metals, the alkaline earth metals, ammonium, iron, zinc, nickel, silver, and tin, and said salt having an anion selected from the group consisting of a carbonate, bicarbonate, nitrate, nitrite, nitride, peroxide, phosphate, phosphite, phosphide, sulfate, sulfite, and sulfide.
Claim 39
Dependent Claim
23 words
A process according to claim 37, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, tributyltin oxide, and tributyltin fluoride.
Claim 40
Dependent Claim
69 words
A process according to claim 38, including from about 0.2 to about 25 parts by weight of a high solubility porosity inducing agent, said high solubility porosity inducing agent selected from the group consisting of the halogenated alkaline metals, the halogenated alkaline earth metals, halogenated iron, halogenated nickel, halogenated zinc, halogenated tin, halogenated silver, ammonium bromide, ammonium carbonate, ammonium chlorate, ammonium chloride, ammonium fluoride, ammonium sulfate, and the like.
Claim 41
Dependent Claim
103 words
A process according to claim 38, wherein said porosity inducing agent is selected from the group consisting of ammonium sulfide, ammonium carbonate, magnesium carbonate, magnesium sulfide, magnesium phosphide, magnesium oxide, sodium nitride, calcium carbonate, calcium bicarbonate, calcium nitride, calcium oxide, calcium phosphate, calcium phosphite, calcium sulfide, calcium sulfite, barium carbonate, barium nitride, barium peroxide, barium phosphite, barium sulfate, barium sulfite, iron carbonate, iron sulfate, iron sulfide, iron sulfite, nickel carbonate, nickel sulfide, zinc carbonate, zinc oxide, zinc sulfide, zinc sulfite, tin sulfide, tin oxide, silver carbonate, silver oxide, silver sulfide, silver sulfite, lithium phosphate, beryllium oxide, strontium carbonate, strontium sulfate, and strontium sulfite.
Claim 42
Dependent Claim
39 words
A process according to claim 40, wherein the melt flow index of said ethylene-vinyl acetate copolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45.
Claim 43
Dependent Claim
62 words
A process according to claim 41, wherein said ethylene-vinyl acetate copolymer contains from about 80 to about 93 percent ethylene and has a molecular weight of from about 75,000 to about 300,000 and wherein said ethylene-propylene copolymer contains from about 45 percent to about 75 percent by weight of ethylene and has a molecular weight of from about 100,000 to about 200,000.
Claim 44
Dependent Claim
27 words
A process according to claim 42, wherein the amount of said anchor is from about 2 to about 10 times the total weight of said floating dispenser.
Claim 45
Dependent Claim
16 words
A process according to claim 43, wherein the line connects said anchor and said floating dispenser.
Claim 46
Dependent Claim
16 words
A process according to claim 44, wherein the line connects said anchor and said floating dispenser.
Claim 47
Dependent Claim
54 words
A process according to claim 42, wherein the amount of said tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate pesticide ranges from about 5 to about 20 parts per 100 parts of said copolymer, and wherein the amount of said tributyltin oxide and said tributyltinfluoride ranges from about 40 parts to about 70 parts per 100 parts of said copolymer.
Claim 48
Dependent Claim
99 words
A process according to claim 46, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, calcium carbonate, ammonium sulfate, ammonium carbonate, iron carbonate, nickel carbonate, zinc carbonate, silver carbonate and strontium carbonate, and wherein the amount of said porosity inducing agent ranges from about 15 parts to about 35 parts by weight per 100 parts of copolymer when said pesticide is tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate and wherein the amount of said porosity inducing agent is from about 25 parts to about 60 parts by weight when said pesticide is said tributyltin oxide or said tributyltin fluoride.
Claim 49
Dependent Claim
14 words
A process according to claim 47, wherein said porosity inducing agent is calcium carbonate.
Claim 50
Dependent Claim
15 words
A process according to claim 48, wherein said floating dispenser is a plurality of strands.
Claim 51
Dependent Claim
97 words
A process according to claim 37, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, magnesium sulfide, magnesium phosphides, magnesium oxide, calcium carbonate, calcium bicarbonate, calcium nitride, calcium oxide, calcium phosphate, calcium phosphite, calcium sulfide, calcium sulfite, barium carbonate, barium nitride, barium peroxide, barium phosphate, barium sulfate, barium sulfite, iron carbonate, iron sulfate, iron sulfide, iron sulfite, nickel carbonate, nickel sulfide, zinc carbonate, zinc oxide, zinc sulfide, zinc sulfite, tin oxide, tin sulfide, silver carbonate, silver oxide, silver sulfide, silver sulfite, lithium phosphate, beryllium oxide, strontium carbonate, strontium sulfate, and strontium sulfite.
Claim 52
Dependent Claim
62 words
A process according to claim 50, wherein said ethylene-vinyl acetate copolymer contains from about 80 to about 93 percent ethylene and has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer contains from about 45 percent to about 75 percent by weight of ethylene and has a molecular weight of from about 100,000 to about 200,000.
Claim 53
Dependent Claim
97 words
A process according to claim 51, wherein said porosity inducing agent is selected from the group consisting of magnesium carbonate, calcium carbonate, ammonium sulfate, barium carbonate, iron carbonate, nickel carbonate, zinc carbonate, and strontium carbonate, and wherein the amount of said porosity inducing agent ranges from about 15 parts to about 35 parts by weight per 100 parts of said copolymer except for said R 3 S n X pesticide, the amount of said R 3 S n X pesticide ranging from about 25 parts to about 60 parts by weight per 100 parts of said copolymer.
Claim 54
Dependent Claim
15 words
A process according to claim 37, wherein said floating dispenser is a plurality of strands.
Claim 55
Dependent Claim
24 words
A process according to claim 37, wherein said anchor weighs from about 2 to about 10 times the total weight of said floating dispenser.
Claim 56
Dependent Claim
66 words
A process according to claim 34, 35, or 36, including from 1 to 60 parts of a high solubility porosity inducing agent, said porosity inducing agent selected from the group consisting of the halogenated alkaline metals, the halogenated alkaline earth metals, halogenated iron, halogenated nickel, halogenated zinc, halogenated tin, halogenated silver, ammonium bromide, ammonium carbonate, ammonium chlorate, ammonium chloride, ammonium fluoride, ammonium sulfate, and the like.
Claim 57
Dependent Claim
95 words
A process according to claims 34, 35, and 36 wherein said porosity inducing agent ranges from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of said porosity inducing agent ranging from about 15 to about 70 parts by weight per 100 parts of copolymer when said porosity inducing agent is said R 3 S n X compound, the solubility of said porosity inducing agent being 0.1 grams or less per 100 grams of water.
Claim 58
Dependent Claim
23 words
A process according to claim 56, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, tributyltin fluoride, and tributyltin oxide.
Claim 59
Dependent Claim
71 words
A process according to claim 57, wherein the melt flow index of said ethylene-vinyl acetate copolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45, wherein said ethylene-vinyl acetate copolymer has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer has a molecular weight of from about 100,000 to about 200,000.
Claim 60
Dependent Claim
24 words
A process according to claim 58, wherein said anchor weighs from about 2 to about 10 times the total weight of said floating dispenser.
Claim 61
Dependent Claim
15 words
A process according to claim 59, wherein said floating dispenser has a plurality of strands.
Claim 62
Dependent Claim
105 words
A process according to claims 34, 35 and 36, including a high solubility porosity inducing agent, the amount of said porosity inducing agent ranges from about 5 to about 70 parts by weight per 100 parts of said copolymer when said pesticide is other than said R 3 S n X compound, the amount of porosity inducing agent ranges from about 15 to about 70 parts by weight per 100 parts of copolymer when said pesticide is said R 3 S n X compound, said porosity inducing agent having a solubility of from about 0.1 grams to about 100 grams per 100 grams of water.
Claim 63
Dependent Claim
23 words
A process according to claim 61, wherein said pesticide is selected from the group consisting of tetramethyl-O,O'-thiodi-p-phenylene phosphorothioate, tributyltin fluoride, and tributyltin oxide.
Claim 64
Dependent Claim
71 words
A process according to claim 62, wherein the melt flow index of said ethylene-vinyl acetate coppolymer ranges from about 6 to about 12 and the melt flow index of said ethylene-propylene copolymer ranges from about 15 to about 45, wherein said ethylene-vinyl acetate copolymer has a molecular weight of from about 75,000 to about 300,000, and wherein said ethylene-propylene copolymer has a molecular weight of from about 100,000 to about 200,000.
Claim 65
Dependent Claim
24 words
A process according to claim 63, wherein said anchor weighs from about 2 to about 10 times the toal weight of said floating dispenser.
Claim 66
Dependent Claim
15 words
A process according to claim 64, wherein said floating dispenser has a plurality of strands.
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |