US4171340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fumigating apparatus and method
Assignee: Earth Corp
•
Filing: 1978-03-02
•
Granted: 1979-10-16
•
Expires: 1998-03-02
Abstract
Abstract A mixture of an active ingredient such as insecticide, fungicide, antiseptic or the like and a blowing agent is heated indirectly with a heat evolved by contacting an exothermic substance with water to decompose the blowing agent and to volatilize the active agent. The mixture is accommodated in at least one compartment of a container while the exothermic substance is accommodated in at least one further compartment provided with water supplying means, said compartments being separated from each other by a partition which provides a heat transferring surface.
Inventors
- 👤 Akira Nishimura
- 👤 Takanobu Kashihara
- 👤 Fukuyasu Okuda
- 👤 Masanaga Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2061; A01M1/2077; A61; A61L; A61L9/00; A61L9/015; A61L9/02; A61L9/03; A01M2200/00; A01M2200/01; A01M2200/011; A01M2200/012
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
108 words
A fumigating apparatus comprising a container having at least one compartment accommodating a mixture of an active ingredient and a blowing agent which is decomposable at a temperature of between about 70° C. and about 300° C. to give off mainly nitrogen gas and at least one further compartment provided adjacent to said compartment and accommodating an exothermic substance which evolves heat by contact with water, the interior of the container being divided with a partition into said compartments, the partition providing a surface for transferring the heat evolved from said exothermic substance to the mixture, the compartment accommodating the exothermic substance being provided with water supplying means.
Claim 2
Dependent Claim
108 words
A fumigating apparatus comprising a container having at least one compartment accommodating a mixture of an active ingredient and a blowing agent which is decomposable at a temperature of between about 70° C. and about 300° C. to give off mainly nitrogen gas and at least one further compartment provided adjacent to said compartment and accommodating an exothermic substance which evolves heat by contact with water, the interior of the container being divided with a partition into said compartments, the partition providing a surface for transferring the heat evolved from said exothermic substance to the mixture, the compartment accommodating the exothermic substance being provided with water supplying means.
Claim 3
Dependent Claim
14 words
An apparatus as defined in claim 1 wherein the exothermic substance is calcium oxide.
Claim 4
Dependent Claim
14 words
An apparatus as defined in claim 1 wherein the active ingredient is an insecticide.
Claim 5
Dependent Claim
14 words
An apparatus as defined in claim 1 wherein the active ingredient is a fungicide.
Claim 6
Dependent Claim
30 words
An apparatus as defined in claim 1 wherein the partition is horizontal, and the mixture is positioned above and separated from the exothermic substance with the horizontal partition interposed therebetween.
Claim 7
Dependent Claim
22 words
An apparatus as defined in claim 1 wherein the mixture accommodating compartment has an open upper end sealed with a meltable film.
Claim 8
Dependent Claim
38 words
An apparatus as defined in claim 1 wherein a water-permeable layer is provided within the closed compartment to permit the water supplied from the water supplying means to pass through the layer into contact with the exothermic substance.
Claim 9
Dependent Claim
26 words
An apparatus as defined in claim 1 wherein the container is provided with means for attaching the apparatus to a vertical wall, column surface or ceiling.
Claim 10
Dependent Claim
28 words
An apparatus as defined in claim 1 wherein the container is provided with means for supplying a specified amount of water to the compartment accommodating the exothermic substance.
Claim 11
Dependent Claim
23 words
An apparatus as defined in claim 1 wherein the partition is vertical to separate the mixture and the exothermic substance from each other.
Claim 12
Dependent Claim
24 words
An apparatus as defined in claim 10 wherein the mixture and the exothermic substance are arranged concentrically with each other when seen in plan.
Claim 13
Dependent Claim
39 words
An apparatus as defined in claim 1 wherein said blowing agent is at least one species selected from the group consisting of azodicabonamide, benzensulfonylhydrazide, p-toluenesulfonylhydrazide, p,p'-oxybis(benzenesulfonylhydrazide), dinitrosopentamethylenetetramine, N,N'-dinitroso-N,N'-dimethylterephthalamide, trihydrazinotriazine, azobisisobutyronitrile, 4,4'-azobiscyanovaleric acid, t-butylazoformamide, 2,4-bis(azosulfonyl)toluene, 2,2'-azobisisobutyloamide, methyl-2,2'-azobisisobutyrate, 2-(carbamoylazo)isobutyronitrile and 1,1'-azobiscyclohexane-1-carbonitrile.
Claim 14
Dependent Claim
13 words
An apparatus as defined in claim 12 wherein the blowing agent is azodicarbonamide.
Claim 15
Dependent Claim
44 words
An apparatus as defined in claim 1 wherein the mixture and the exothermic substance are horizontally and vertically separated from each other by the partition, the mixture being positioned on and beside the partition, the exothermic substance being positioned beneath and beside the partition.
Claim 16
Dependent Claim
24 words
An apparatus as defined in claim 14 wherein the mixture and the exothermic substance are arranged concentrically with each other when seen in plan.
Claim 17
Dependent Claim
18 words
An apparatus as defined in claim 15 wherein the mixture accommodating compartment is divided into at least two.
Claim 18
Dependent Claim
17 words
An apparatus as defined in claim 1 wherein the compartment accommodating the exothermic substance is substantially closed.
Claim 19
Dependent Claim
28 words
An apparatus as defined in claim 17 wherein the water supplying means is at least one water inlet aperture formed in an upper portion of the closed compartment.
Claim 20
Dependent Claim
30 words
An apparatus as defined in claim 17 wherein the water supplying means is at least one water inlet aperture formed in a lower portion of the exothermic substance accommodating compartment.
Claim 21
Dependent Claim
35 words
An apparatus as defined in claim 17 wherein the closed compartment is provided with a water receptacle in its top portion, and the water inlet aperture is formed in the bottom of the water receptacle.
Claim 22
Dependent Claim
35 words
An apparatus as defined in claim 17 wherein the water supplying means is a water reservoir provided within the closed compartment, and the water reservoir is provided with means for opening the reservoir from outside.
Claim 23
Dependent Claim
31 words
An apparatus as defined in claim 17 wherein the closed compartment is provided with an opening for maintaining the internal pressure of the closed compartment in balance with the outside pressure.
Claim 24
Dependent Claim
78 words
A fumigating method comprising heating indirectly a mixture of an active ingredient and a blowing agent with heat evolved from an exothermic substance which evolves heat by contact with water, thereby decomposing the blowing agent and volatilizing the active ingredient, said blowing agent being decomposable at a temperature of between about 70° C. and about 300° C. to give off mainly nitrogen gas and contacting an object, material or area to be treated with the so generated fumigant.
Claim 25
Dependent Claim
78 words
A fumigating method comprising heating indirectly a mixture of an active ingredient and a blowing agent with heat evolved from an exothermic substance which evolves heat by contact with water, thereby decomposing the blowing agent and volatilizing the active ingredient, said blowing agent being decomposable at a temperature of between about 70° C. and about 300° C. to give off mainly nitrogen gas and contacting an object, material or area to be treated with the so generated fumigant.
Claim 26
Dependent Claim
15 words
A fumigating method as defined in claim 23 wherein the active ingredient is an insecticide.
Claim 27
Dependent Claim
15 words
A fumigating method as defined in claim 23 wherein the active ingredient is a fungicide.
Claim 28
Dependent Claim
15 words
A fumigating method as defined in claim 23 wherein the exothermic substance is calcium oxide.
Claim 29
Dependent Claim
40 words
A fumigating method as defined in claim 23 wherein said blowing agent is at least one species selected from the group consisting of azodicarbonamide, benzenesulfonylhydrazide, p-toluenesulfonylhydrazide, p,p'-oxybis(benzenesulfonylhydrazide), dinitrosopentamethylenetetramine, N,N'-dinitroso-N,N'-dimethylterephthalamide, trihydrazinotriazine, azobisisobutyronitrile, 4,4'-azobiscyanovaleric acid, t-butylazoformamide, 2,4-bis(azosulfonyl)toluene, 2,2'-azobisisobutyloamide, methyl-2,2'-azobisisobutyrate, 2-(carbamoylazo)isobutyronitrile and 1,1'-azobiscyclohexane-1-carbonitrile.
Claim 30
Dependent Claim
29 words
A fumigating method as defined in claim 27 wherein said blowing agent is at least one species selected from the group consisting of azodicarbonamide, p,p'-oxybis(benzenesulfonylhydrazide), dinitrosopentamethylenetetramine, azobisisobutyronitrile and 1,1'-azobiscyclohexane-1-carbonitrile.
Claim 31
Dependent Claim
14 words
A fumigating method as defined in claim 2 wherein the blowing agent is azodicarbonamide.
References Cited (Backward Citations)
GB673429A
Cited
US2497612A
Cited
US586759A
Cited
US1652291A
Cited
US2071171A
Cited
US2440082A
Cited
US2540095A
Cited
US2590529A
Cited
US2682461A
Cited
GB699766A
Cited
US2767511A
Cited
US2690501A
Cited
US2813187A
Cited
US3446893A
Cited
US3645931A
Cited
US3903015A
Cited
US3806323A
Cited
US3956849A
Cited
JPS50125039A
Cited
US3986838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |