US4585451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices which are adapted to slowly release chemicals, such as hormones, drugs and minerals
Assignee: AHI Operations Ltd
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Filing: 1983-05-09
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Granted: 1986-04-29
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Expires: 2003-05-09
Abstract
Abstract A device for the slow release of chemicals into the body of an animal when the device is positioned in a body cavity of that animal, is formed as a flexible core member (1) from polypropylene, polyethylene or other polymer in a shape having a plurality of lobes (4,8) one (4) of which is longer than other shorter lobes (8) and the shorter lobes (8) being foldable for insertion and removal purposes. The core (1) has a solid (3) secured to the surface thereof or forming a part of the surface thereof which solid of silicone rubber or ethylene vinyl acetate or other suitable polymer is impregnated with one or more chemicals which in use are leached therefrom by body fluids. A withdrawal ligament (14) is attached to the free end of the longer lobe.
Inventors
- 👤 Thomas D. Millar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:50
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0034; A61K9/0036; A61M; A61M31/00; A61M31/002
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
A device for insertion into the vaginal cavity of an animal and for producing a controlled rate of release of chemicals into said vaginal cavity, said device comprising a flexible member having a plurality of compressible lobes wherein one lobe is longer than the others and the shorter lobes are each in the form of a closed loop, wherein each loop is formed by two arms joined together such that each loop has two ends and the central portion of each arm is displaced away from a plane containing both ends of the loop and in opposite directions, and wherein said shorter lobes are foldable during insertion of said device into and removal of said device from the vaginal cavity and at least some of the lobes having on a surface thereof a solid impregnated with chemical impreganat adapted to leach from the solid when exposed to body fluids, said longer lobe having drawstring means for a single step withdrawal of said device from the body cavity.
Claim 2
Independent Claim
167 words
A device for insertion into the vaginal cavity of an animal and for producing a controlled rate of release of chemicals into said vaginal cavity, said device comprising a flexible member having a plurality of compressible lobes wherein one lobe is longer than the others and the shorter lobes are each in the form of a closed loop, wherein each loop is formed by two arms joined together such that each loop has two ends and the central portion of each arm is displaced away from a plane containing both ends of the loop and in opposite directions, and wherein said shorter lobes are foldable during insertion of said device into and removal of said device from the vaginal cavity and at least some of the lobes having on a surface thereof a solid impregnated with chemical impreganat adapted to leach from the solid when exposed to body fluids, said longer lobe having drawstring means for a single step withdrawal of said device from the body cavity.
Claim 3
Dependent Claim
18 words
The device of claim 1 wherein the longer lobe is greater than 25% longer than the shorter lobes.
Claim 4
Dependent Claim
18 words
The device of claim 2 wherein the longer lobe is greater than 50% longer than the shorter lobes.
References Cited (Backward Citations)
FR36805E
Cited
DE2207939A1
Cited
US4180064A
Cited
US4012497A
Cited
US4198966A
Cited
US4246896A
Cited
US4449980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |