US3858807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for emitting vapors of volatile insecticidal agents or of similar volatile products
Assignee: Novartis AG
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Filing: 1972-02-18
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Granted: 1975-01-07
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Expires: 1992-02-18
Abstract
Abstract An apparatus which is adapted for emitting at room temperature vapors of volatile insecticidal agents or of similar volatile active liquid products such as insect repellants comprises a body made from a single fibrous plate or a stack of fibrous plates capable of absorbing the agent or product. The body is coated on at least one of its larger, principal outer faces with a diffusion layer of polymeric material diffusable by the said agent or product so as to emit vapors of the latter from the outer surface of the layer; the layer adheres on its inner side intimately to the fibers of the adjacent face of the fibrous plate to which it is applied. The apparatus further comprises a frame of metal or synthetic thermoplastic or the like material impervious to the volatile agent or product or to its vapors and sealing the body hermetically on all sides except the face or faces thereof which are coated with a diffusion layer where the frame has a window or windows; the layer is hermetically sealed along its periphery to the frame.
Inventors
- 👤 Bernard Rabussier
- 👤 Jean-Pierre Mandon
- 👤 Claude Hennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:47
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2027; A01M1/2044; A01N; A01N25/00; A01N25/18
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
239 words
An apparatus adapted for emitting at room temperature vapors of a volatile active liquid product, comprising Alpha . an evaporator unit consisting essentially of a. a plate body having two large end faces at opposite sides thereof and comprising i. at least one fibrous product absorbing plate; and ii. a diffusion layer of thermoplastic polymeric material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, said layer being superimposed on at least one of the two larger, principal outer faces of said plate body, and being intimately joined with its inner face to the adjacent large principal surface of said plate body; and b. a frame made of a material selected from metal and synthetic thermoplastic material, being impervious to said liquid product and the vapors of the latter, and having at least one window registering with an aforesaid diffusion layer and being sealingly connected by means of at least a marginal frame portion about said window to the underlying peripheral zone of said diffusion layer, said vapor-impervious frame hermetically enclosing said body on all sides of the latter which are free from a diffusion layer; and Beta . openable or removable protective means impervious to said liquid product and vapors thereof and adapted for sealing in said apparatus after absorption of active liquid product in said plate body.
Claim 2
Independent Claim
239 words
An apparatus adapted for emitting at room temperature vapors of a volatile active liquid product, comprising Alpha . an evaporator unit consisting essentially of a. a plate body having two large end faces at opposite sides thereof and comprising i. at least one fibrous product absorbing plate; and ii. a diffusion layer of thermoplastic polymeric material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, said layer being superimposed on at least one of the two larger, principal outer faces of said plate body, and being intimately joined with its inner face to the adjacent large principal surface of said plate body; and b. a frame made of a material selected from metal and synthetic thermoplastic material, being impervious to said liquid product and the vapors of the latter, and having at least one window registering with an aforesaid diffusion layer and being sealingly connected by means of at least a marginal frame portion about said window to the underlying peripheral zone of said diffusion layer, said vapor-impervious frame hermetically enclosing said body on all sides of the latter which are free from a diffusion layer; and Beta . openable or removable protective means impervious to said liquid product and vapors thereof and adapted for sealing in said apparatus after absorption of active liquid product in said plate body.
Claim 3
Dependent Claim
110 words
AT LEAST ONE FIBROUS PRODUCT ABSORBING PLATE; AND II. A DIFFUSION LAYER OF THERMOPLASTIC POLYMERIC MATERIAL 10 TO 80 U THICK CAPABLE OF PERMITTING SAID PRODUCT TO DIFFUSE THERETHROUGH AND VAPORS OF SAID PRODUCT TO EVAPORATE FROM AN OUTER SURFACE THEREOF AT AN EFFECTIVE RATE, SAID LAYER BEING SUPERIMPOSED ON AT LEAST ONE OF THE TWO LARGER, PRINCIPAL OUTER FACES OF SAID PLATE BODY, AND BEING INTIMATELY JOINED WITH ITS INNER FACE TO THE ADJACENT LARGE PRINCIPAL SURFACE OF SAID PLATE BODY; AND B. A FRAME MADE OF A MATERIAL SELECTED FROM METAL AND SYNTHETIC THERMPOLASTIC MATERIAL, BEING IMPERVIOUS TO SAID LIQUID PRODUCT AND THE VAPORS OF THE LATTER, AND
Claim 4
Dependent Claim
110 words
AT LEAST ONE FIBROUS PRODUCT ABSORBING PLATE; AND II. A DIFFUSION LAYER OF THERMOPLASTIC POLYMERIC MATERIAL 10 TO 80 U THICK CAPABLE OF PERMITTING SAID PRODUCT TO DIFFUSE THERETHROUGH AND VAPORS OF SAID PRODUCT TO EVAPORATE FROM AN OUTER SURFACE THEREOF AT AN EFFECTIVE RATE, SAID LAYER BEING SUPERIMPOSED ON AT LEAST ONE OF THE TWO LARGER, PRINCIPAL OUTER FACES OF SAID PLATE BODY, AND BEING INTIMATELY JOINED WITH ITS INNER FACE TO THE ADJACENT LARGE PRINCIPAL SURFACE OF SAID PLATE BODY; AND B. A FRAME MADE OF A MATERIAL SELECTED FROM METAL AND SYNTHETIC THERMPOLASTIC MATERIAL, BEING IMPERVIOUS TO SAID LIQUID PRODUCT AND THE VAPORS OF THE LATTER, AND
Claim 5
Independent Claim
38 words
AN APPARATUS ADAPTED FOR EMITTING AT ROOM TEMPERATURE VAPORS OF A VOLATILE ACTIVE LIQUID PRODUCT, COMPRISING A. AN EVAPORATOR UNIT CONSISTING ESSENTIALLY OF A. A PLATE BODY HAVING TWO LARGE END FACES AT OPPOSITE SIDES THEREOF AND COMPRISING
Claim 6
Independent Claim
38 words
AN APPARATUS ADAPTED FOR EMITTING AT ROOM TEMPERATURE VAPORS OF A VOLATILE ACTIVE LIQUID PRODUCT, COMPRISING A. AN EVAPORATOR UNIT CONSISTING ESSENTIALLY OF A. A PLATE BODY HAVING TWO LARGE END FACES AT OPPOSITE SIDES THEREOF AND COMPRISING
Claim 7
Dependent Claim
31 words
An apparatus as described in claim 1, wherein said protective means comprise a sheet the periphery of which is sealed hermetically to said frame so as to cover a window therein.
Claim 8
Dependent Claim
36 words
An apparatus as described in claim 1, wherein said protective means comprise an impervious openable envelope sealingly enclosing said evaporator unit, thereby preventing loss of vapors of said active liquid product during storage of said apparatus.
Claim 9
Dependent Claim
85 words
An apparatus as claimed in claim 1 in which the diffusion layer has as the main constituent thereof a material selected from the group consisting of polyethylene, polypropylene, a mixture of polyethylene and polypropylene, a copolymer of ethylene and propylene, a copolymer of vinylidene chloride with vinyl chloride, a copolymer of vinylidene chloride with an acrylic ester, and a copolymer of vinylidene chloride with acrylonitrile having a vinylidene chloride content of from about 75 to 97 percent calculated on the total weight of the copolymer.
Claim 10
Dependent Claim
20 words
An apparatus as claimed in claim 1 in which the frame and the diffusion layer are of identical polymeric material.
Claim 11
Dependent Claim
30 words
An apparatus as claimed in claim 1 wherein said plate body comprises a plurality of face-to-face fibrous absorbent plates therein and a volatile active liquid product impregnating said absorbent plates.
Claim 12
Dependent Claim
186 words
An evaporator unit for use in apparatus adapted for emitting at room temperature vapors of a volatile active liquid product, comprising a. a plate body which comprises i. at least one fibrous product-absorbing plate; and ii. a diffusion layer of thermoplastic polymeric material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, said layer being superimposed on at least one of the two larger, principal outer faces of said plate body, and being intimately joined with its inner face to the adjacent large principal surface of said plate body; and b. a frame made of a material being impervious to said liquid product and the vapors of the latter, and having at least one window registering with an aforesaid diffusion layer and being sealingly connected by means of at least a marginal frame portion about said window to the underlying peripheral zone of said diffusion layer, said vapor-impervious frame hermetically enclosing said body on all sides of the latter which are free from a diffusion layer.
Claim 13
Dependent Claim
186 words
An evaporator unit for use in apparatus adapted for emitting at room temperature vapors of a volatile active liquid product, comprising a. a plate body which comprises i. at least one fibrous product-absorbing plate; and ii. a diffusion layer of thermoplastic polymeric material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, said layer being superimposed on at least one of the two larger, principal outer faces of said plate body, and being intimately joined with its inner face to the adjacent large principal surface of said plate body; and b. a frame made of a material being impervious to said liquid product and the vapors of the latter, and having at least one window registering with an aforesaid diffusion layer and being sealingly connected by means of at least a marginal frame portion about said window to the underlying peripheral zone of said diffusion layer, said vapor-impervious frame hermetically enclosing said body on all sides of the latter which are free from a diffusion layer.
Claim 14
Dependent Claim
33 words
An evaporator unit as described in claim 7, wherein said frame is made of metal and is crimped about the rim of said plate body, thus being hermetically sealed to the diffusion layer.
Claim 15
Dependent Claim
33 words
An evaporator unit as described in claim 7 wherein said fibrous product-absorbing plate is of a material selected from strong-sized paper, non-sized paper, wool felt, felt card, cardboard, glass fiber and non-woven fabric.
Claim 16
Dependent Claim
20 words
An evaporator unit as described in claim 7, wherein said plate body consists essentially of a single fibrous product-absorbing plate.
Claim 17
Dependent Claim
26 words
An evaporator unit as described in claim 10, wherein said single fibrous product-absorbing plate bears an aforesaid diffusion layer only on one of its large faces.
Claim 18
Dependent Claim
55 words
An evaporator unit as described in claim 7, wherein said plate body comprises two fibrous product-absorbing plates each of which bears an aforesaid diffusion layer on one of its two large faces, said two plates being juxtaposed with their two uncoated large faces, said two diffusion layers being opposite end faces of said plate body.
Claim 19
Dependent Claim
21 words
An evaporator unit as described in claim 12, wherein said two plates are joined together with their respective large uncoated faces.
Claim 20
Dependent Claim
45 words
An evaporator unit as described in claim 12, wherein said plate body comprises at least one fibrous absorbent plate free from a diffusion layer interposed with its two large faces between and in direct contact with the uncoated large faces of said two end plates.
Claim 21
Dependent Claim
94 words
An evaporator unit as described in claim 12, wherein said frame consists of two half boxes each of which has a window containing a grille, and each of which is mounted about one of said terminal end plates with the window and grille therein spacedly above the diffusion layer of said end plate, and wherein each of said half boxes has a rim disposed about the periphery of the respective end plate and extending beyond the latter toward the other end plate, the rims of both half boxes being sealingly connected with each other.
Claim 22
Dependent Claim
43 words
An evaporator unit as described in claim 15, further comprising protective means comprising two sheets of vapor-impervious material, each of said sheets being sealingly connected to the marginal zones of one of said half boxes about and above said window and grille therein.
Claim 23
Dependent Claim
18 words
An evaporator unit as described in claim 7, wherein said frame is made of said impervious thermoplastic material.
Claim 24
Dependent Claim
27 words
An evaporator unit as described in claim 7, wherein said diffusion layer is made of a thermoplastic polymeric material selected from polyethylene, polypropylene and plasticized polyvinyl chloride.
Claim 25
Dependent Claim
182 words
An evaporator adapted for emitting at room temperature vapors of a volatile active liquid product, comprising a. a plate body having two large end faces at opposite sides thereof and comprising i. at least one fibrous product-absorbing plate and ii. two diffusion layers of polymeric thermoplastic material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, one of said layers being superimposed on each of said large, principal end faces of said plate body and being intimately joined with its inner face to the adjacent surface of said plate body; each diffusion layer having a marginal portion which extends beyond said plate, the two marginal portions of said diffusion layers being sealed together to form a frame about said plate body b. protective enveloping means of a material impervious to said liquid product and to the vapors of the latter, said protective means being of foiL-shape and tearably and removably laminated on to the outer surface of each of said diffusion layer.
Claim 26
Dependent Claim
182 words
An evaporator adapted for emitting at room temperature vapors of a volatile active liquid product, comprising a. a plate body having two large end faces at opposite sides thereof and comprising i. at least one fibrous product-absorbing plate and ii. two diffusion layers of polymeric thermoplastic material 10 to 80 Mu thick capable of permitting said product to diffuse therethrough and vapors of said product to evaporate from an outer surface thereof at an effective rate, one of said layers being superimposed on each of said large, principal end faces of said plate body and being intimately joined with its inner face to the adjacent surface of said plate body; each diffusion layer having a marginal portion which extends beyond said plate, the two marginal portions of said diffusion layers being sealed together to form a frame about said plate body b. protective enveloping means of a material impervious to said liquid product and to the vapors of the latter, said protective means being of foiL-shape and tearably and removably laminated on to the outer surface of each of said diffusion layer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |