Patent US3820535A successfully refreshed from Google Patents.
US3820535A
Expired / Lapsed
US
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Intrauterine device
Assignee: Individual
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Filing: 1972-10-25
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Granted: 1974-06-28
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Expires: 1992-10-25
Abstract
Abstract An intrauterine contraceptive device has a central body portion with legs or ribs projecting radially therefrom and presenting a three-dimensional configuration. The ribs are hinged to the central body portion and collapse in the manner of a parasol to provide a linear two-dimensional unit for insertion of the device into the uterine cavity. A portion of the device, such as the central body portion, may be formed of a ball chain of heavy metal to increase the contraceptive efficiency of the device.
Inventors
- 👤 J Marco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:04
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
An intrauterine contraceptive device comprising a central body portion an elongated guide member mounted on said central body portion and depending therefrom, and two pairs of elongated leg members hingedly connected to said central body portion and having a normal extended position in which they project radially therefrom and in a direction perpendicular to the axis of said guide member, each of said leg members having a channel shaped outer portion and an inner portion of reduced cross-sectional extent providing flexible hinge means for downward bending movement of said leg members relative to said central body portion to a retracted position in which said leg members are substantially parallel to and lie along said guide member to provide a small compact configuration for insertion of said device into the uterus.
Claim 2
Dependent Claim
130 words
An intrauterine contraceptive device comprising a central body portion an elongated guide member mounted on said central body portion and depending therefrom, and two pairs of elongated leg members hingedly connected to said central body portion and having a normal extended position in which they project radially therefrom and in a direction perpendicular to the axis of said guide member, each of said leg members having a channel shaped outer portion and an inner portion of reduced cross-sectional extent providing flexible hinge means for downward bending movement of said leg members relative to said central body portion to a retracted position in which said leg members are substantially parallel to and lie along said guide member to provide a small compact configuration for insertion of said device into the uterus.
Claim 3
Dependent Claim
25 words
An intrauterine device according to claim 1 in which at least a portion of said guide member comprises a flexible chain of heavy metal balls.
Claim 4
Dependent Claim
76 words
An intrauterine device according to claim 1 which includes a pair of elongated leg members projecting from opposite sides of said central body portion and extending along a common longitudinal axis, and a flexible thread attached to the end portion of each of said legs, each of said threads being sized and arranged to draw said leg members downwardly to their retracted position during insertion of said device to the fundus portion of the uterine cavity.
Claim 5
Dependent Claim
44 words
An intrauterine device according to claim 1 which also includes a flexible membrane secured to said leg members and extending therebetween, said membrane having a surface area covering substantially the entire upper area of said device defined by the ends of said leg members.
Claim 6
Dependent Claim
48 words
An intrauterine device according to claim 3 which also includes a flexible membrane Secured to said pair of leg members along the lengths thereof and extending in opposite directions laterally from said leg members for a distance at least as long as the length of each leg member.
Claim 7
Dependent Claim
20 words
An intrauterine device according to claim 1 in which said guide member comprises a cylindrical body made of heavy metal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |