US4947578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled release system for insect attractant
Assignee: Ecolab USA Inc
•
Filing: 1989-06-16
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Granted: 1990-08-14
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Expires: 2009-06-16
Abstract
Abstract A controlled release system for volatile liquid insect attractant compositions can be formed from a container having an aperture closed by a membrane, wherein the dimensions of the container, the dimensions of the aperture, the nature of the membrane, the liquid level, and vapor space within the container are conformed to produce an effective attractant release rate.
Inventors
- 👤 Douglas G. Anderson
- 👤 Keith D. Lokkesmoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:33
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/14; A01M1/02; A01N; A01N25/00; A01N25/18; A01M2200/00; A01M2200/01; A01M2200/012
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
73 words
A controlled release device for a volatile liquid insect attractant composition, which device comprises: (a) an enclosure for the volatile attractant composition, said enclosure having an aperture; (b) a volatile insect attractant comprising ethanol, a volatile ester or a mixture thereof held within said enclosure; and (c) a membrane permeable to the attractant vapor covering said aperture; wherein the device releases the attractant vapor at a rate of at least about 0.02 gm/hr.
Claim 2
Dependent Claim
73 words
A controlled release device for a volatile liquid insect attractant composition, which device comprises: (a) an enclosure for the volatile attractant composition, said enclosure having an aperture; (b) a volatile insect attractant comprising ethanol, a volatile ester or a mixture thereof held within said enclosure; and (c) a membrane permeable to the attractant vapor covering said aperture; wherein the device releases the attractant vapor at a rate of at least about 0.02 gm/hr.
Claim 3
Dependent Claim
14 words
The device of claim 1 wherein the membrane is impermeable to the liquid attractant.
Claim 4
Dependent Claim
10 words
The device of claim 1 wherein the enclosure is cylindrical.
Claim 5
Dependent Claim
10 words
The device of claim 1 wherein the aperture is circular.
Claim 6
Dependent Claim
21 words
The device of claim 1 wherein the vapor pressure of the attractant is at least 30 mm Hg at 75° F.
Claim 7
Dependent Claim
16 words
The device of claim 1 wherein the ester is a lower alkanol ester of acetic acid.
Claim 8
Dependent Claim
24 words
The device of claim 1 wherein the device releases attractant at a rate that maintains effective insect attractancy until the liquid attractant is consumed.
Claim 9
Dependent Claim
14 words
The device of claim 1 wherein the device is configured for flying insect pests.
Claim 10
Dependent Claim
13 words
The device of claim 8 wherein the device is conformed for Musca domestica.
Claim 11
Dependent Claim
93 words
A controlled release device for a volatile flying insect attractant composition, which device comprises: (a) an enclosure for the volatile attractant composition, said enclosure having an aperture; (b) a volatile insect attractant comprising ethanol, a volatile ester or a mixture thereof held within said enclosure; and (c) a membrane permeable to the attractant vapor covering said aperture; wherein the device releases the attractant vapor at a rate of about 0.02 to 0.2 gm/hr, and wherein the device is conformed for an insect from the family Muscidae, Sarcophagidae, Calliphoridae, Drosophilidae, Phoridae, Psychodidae, or Fungivoridae.
Claim 12
Dependent Claim
93 words
A controlled release device for a volatile flying insect attractant composition, which device comprises: (a) an enclosure for the volatile attractant composition, said enclosure having an aperture; (b) a volatile insect attractant comprising ethanol, a volatile ester or a mixture thereof held within said enclosure; and (c) a membrane permeable to the attractant vapor covering said aperture; wherein the device releases the attractant vapor at a rate of about 0.02 to 0.2 gm/hr, and wherein the device is conformed for an insect from the family Muscidae, Sarcophagidae, Calliphoridae, Drosophilidae, Phoridae, Psychodidae, or Fungivoridae.
Claim 13
Dependent Claim
56 words
The device of claim 10 wherein the enclosure is cylindrical. (b) a volatile insect attractant comprising ethanol, a volatile ester or a mixture thereof held within said enclosure; and (c) a membrane permeable to the attractant vapor covering said aperture; wherein the device releases the attractant vapor at a rate of at least about 0.02 gm/hr.
Claim 14
Dependent Claim
14 words
The device of claim 10 wherein the membrane is impermeable to the liquid attractant.
Claim 15
Dependent Claim
10 words
The device of claim 10 wherein the aperture is circular.
Claim 16
Dependent Claim
21 words
The device of claim 10 wherein the vapor pressure of the attractant is at least 30 mm Hg at 25° F.
Claim 17
Dependent Claim
16 words
The device of claim 10 wherein the ester is a lower alkanol ester of acetic acid.
Claim 18
Dependent Claim
24 words
The device of claim 10 wherein the device releases attractant at a rate that maintains effective insect attractancy until the liquid attractant is consumed.
Claim 19
Dependent Claim
13 words
The device of claim 10 wherein the device is conformed for Musca domestica.
Claim 20
Dependent Claim
110 words
A controlled release system, for a volatile liquid attractant for Musca domestica, which device is conformed to produce an effective release rate of an attractant that can maintain attractancy until consumed, which device comprises: (a) a cylindrical enclosure, having a radius of about 5 to 15 cm and a depth of about 2 to 8 cm, for the volatile attractant composition, the enclosure having an aperture; (b) a volatile attractant comprising ethanol, held within said enclosure; (c) a semi-permeable membrane having a pore dimension of about 0.001 to 0.05 microns covering said aperture; wherein the device can release the ethanolic attractant at a rate of about 0.02 to 0.2 gm/hr.
Claim 21
Dependent Claim
110 words
A controlled release system, for a volatile liquid attractant for Musca domestica, which device is conformed to produce an effective release rate of an attractant that can maintain attractancy until consumed, which device comprises: (a) a cylindrical enclosure, having a radius of about 5 to 15 cm and a depth of about 2 to 8 cm, for the volatile attractant composition, the enclosure having an aperture; (b) a volatile attractant comprising ethanol, held within said enclosure; (c) a semi-permeable membrane having a pore dimension of about 0.001 to 0.05 microns covering said aperture; wherein the device can release the ethanolic attractant at a rate of about 0.02 to 0.2 gm/hr.
Claim 22
Dependent Claim
24 words
The device of claim 18 wherein the aperture is circular and the ratio of the aperture diameter to enclosure diameter is 0.01 to 0.1.
Claim 23
Dependent Claim
22 words
The device of claim 19 wherein the initial distance between the volatile liquid attractant and the aperture is at least 0.1 cm.
Claim 24
Dependent Claim
21 words
The device of claim 20 wherein the distance between the aperture and the liquid level is not more than 5 cm.
Claim 25
Dependent Claim
32 words
The device of claim 18 wherein the athanolic attractant comprises a major proportion of ethanol and about 0.05 to 5 v/v % of a volatile C 1-5 alkanol ester of acetic acid.
Claim 26
Dependent Claim
25 words
The device of claim 22 wherein the ethanolic attractant comprises a major proportion of ethanol and about 0.1 to 1 v/v % of amyl acetate.
Claim 27
Dependent Claim
13 words
The device of claim 18 wherein the semi-permeable membrane is a stretched polyolefin.
Claim 28
Dependent Claim
21 words
The device of claim 18 wherein the aperture is proximate to a means to entrap insect pests attracted by the device.
Claim 29
Dependent Claim
20 words
The device of claim 25 wherein the means to entrap comprises a surface having a coating of a pressure-sensitive adhesive.
Claim 30
Dependent Claim
31 words
The device of claim 18 wherein the cylindrical enclosure has a capacity of about 15 to 450 grams and wherein the aperture is in a surface exposed to the attractant vapor.
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |