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US3952734A Expired / Lapsed US ⏱️ 0.0 years remaining

Intra-uterine-device

Assignee: Multilan AG
•
Filing: 1975-02-06
•
Granted: 1976-04-27
•
Expires: 1995-02-06
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Abstract

Abstract Intra-uterine-device meant to be inserted into the uterus, comprising an elongated stem, carrying at one end two resilient, canti-levered arms, extending sideways on either side of the stem, which stem is contained within a tube shaped sheath by means of which the device may be inserted into the uterine cavity through the cervix, after which the sheath may be pulled back, wherein the sheath narrowly encloses the stem, whereas the shape and flexibility of the arms are chosen in such manner, that the arms are easily collapsable onto the outer surface of the sheath. The arms, when relaxed, curve back towards the stem, so that they substantially form part of an ellipse, the longer axis of which coincides with the stem. The stem may at least partially be covered with a layer preventing pregnancy, which layer enhances the effect of the device. This layer may consist of a copper wire wound on the stem or of a carrier for a hormone preparation.

Inventors

  • 👤 Willem Arthur Adriann Algernon Van Os
  • 👤 Pieter Eduard Reinier Rhemrev

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 22:33
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 134 words
Intra-uterine-device meant to be inserted into the uterus, comprising an elongated stem, carrying at one end two resilient, canti-levered arms, extending sideways on either side of the stem, which stem is contained within a tube shaped sheath by means of which the device may be inserted into the uterine cavity through the cervix, after which the sheath may be pulled back, characterized in that, the sheath narrowly encloses the stem, whereas the shape and flexibility of the arms are choosen in such manner that the arms, when passing the cervix, are pressed together onto the outer surface of the sheath by the cervix wall, said arms, when relaxed after insertion, curving back towards said stem so that they substantially form a portion of an ellipse, the longer axis of which coincides with said stem.
Claim 2
Dependent Claim 134 words
Intra-uterine-device meant to be inserted into the uterus, comprising an elongated stem, carrying at one end two resilient, canti-levered arms, extending sideways on either side of the stem, which stem is contained within a tube shaped sheath by means of which the device may be inserted into the uterine cavity through the cervix, after which the sheath may be pulled back, characterized in that, the sheath narrowly encloses the stem, whereas the shape and flexibility of the arms are choosen in such manner that the arms, when passing the cervix, are pressed together onto the outer surface of the sheath by the cervix wall, said arms, when relaxed after insertion, curving back towards said stem so that they substantially form a portion of an ellipse, the longer axis of which coincides with said stem.
Claim 3
Dependent Claim 28 words
Device according to claim 1, characterized in, that the stem is at least partially covered with a layer preventing pregnancy, which layer enhances the effect of the device.
Claim 4
Dependent Claim 24 words
Device according to claim 2, characterized in that the layer consists of metal and more particularly of a copper wire wound on the stem.
Claim 5
Dependent Claim 18 words
Device according to claim 2, characterized in that the layer consists of a carrier for a hormone preparation.
Claim 6
Dependent Claim 26 words
Device according to claim 1 wherein said one end of said stem is formed into a curved head portion to facilitate said insertion of said device.

References Cited (Backward Citations)

US3533406A Cited
US3782376A Cited
US3857391A Cited
US3820535A Cited
US3880156A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-04-27 1979-10-27 1980-04-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-04-27 1983-10-27 1984-04-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-04-27 1987-10-27 1988-04-27 $7700.00 Window Closed / Lapsed

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