US3834378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrauterine device
Assignee: AH Robins Co Inc
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Filing: 1973-02-26
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Granted: 1974-09-10
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Expires: 1993-02-26
Abstract
Abstract An intrauterine device composite is provided which comprises a plastic matrix, such as a copolymer of ethylene and vinyl acetate, having a particulate material selected from the group consisting of metals such as copper, zinc, silver, platinum, or cadmium, and metal salts dispersed within the matrix. The particulate preferably includes both a metal and a salt, such as a sulfate, thereof, although solely a salt or a metal particulate may be utilized. In addition, a radio-opaque particulate such as barium sulfate is preferably also dispersed within the composite. The particulate material preferably comprises between 0.1% to 50% by weight of the composite, and the matrix preferably has a water permeability or rate of water vapor transmission of at least 0.3 grams/100 square inches/24 hours/mil at 25* C.
Inventors
- 👤 I Lerner
- 👤 H Davis
- 👤 T Earl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/148; A61B; A61B90/00; A61B90/39
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
24 words
An intrauterine device having a composition in accordance with claim 1, wherein said particulate material comprises a metal and a salt of said metal.
Claim 2
Dependent Claim
36 words
An intrauterine device having a composition in accordance with claim 1, wherein the material comprising said plastic matrix has a water permeability of at least 0.3 grams/100 square inches/24 hours/mil at a temperature of 25* Centigrade.
Claim 3
Dependent Claim
36 words
An intrauterine device having a composition in accordance with claim 1, wherein the material comprising said plastic matrix has a water permeability of at least 10 grams/100 square inches/24 hours/mil at a temperature of 25* Centigrade.
Claim 4
Dependent Claim
28 words
An intrauterine device having a composition in accordance with claim 1, wherein said material comprising the plastic matrix is a copolymer of ethylene and a vinyl monomer material.
Claim 5
Dependent Claim
69 words
An intrauterine contraceptive device made from a composition material as defined in claim 1 enabling flexing to conform to the uterine cavity, further comprising: a central body having a perimeter portion with nose, tail and side portions and encompassing an area which can be contained within a normal uterus, and at least three spaced apart short spurs on each of said side portions extending outwardly from said perimeter portion.
Claim 6
Dependent Claim
28 words
An intrauterine device having a composition in accordance with claim 6, wherein said material comprising the plastic matrix is a copolymer of ethylene and a vinyl monomer material.
Claim 7
Dependent Claim
61 words
An intrauterine contraceptive device made from a composition material as defined in claim 1 enabling flexing to conform to the uterine cavity, further comprising; a ring-like perimeter portion having a nose portion and opposite therefrom a tail portion with side portions joining said nose and tail portions; and a plurality of spur-like retaining means extending outwardly from each said side portion.
Claim 8
Dependent Claim
24 words
An intrauterine device having a composition in accordance with claim 8, wherein said particulate material comprises a metal and a salt of said metal.
Claim 9
Dependent Claim
28 words
An intrauterine device having a composition in accordance with claim 9, wherein said material comprising the plastic matrix is a copolymer of ethylene and a vinyl monomer material.
Claim 10
Dependent Claim
73 words
An intrauterine device having a body structure encompassing an area which can be contained within a normal uterus, made from a composition enabling flexing to conform to the uterine cavity comprising: a plastic matrix, and a particulate material comprising at least copper and a salt of copper; said particulate material being dispersed within said plastic matrix; and said particulate material comprising between 0.1% to 10% by weight of the composition of said device.
Claim 11
Dependent Claim
20 words
An intrauterine device having a composition in accordance with claim 11; wherein said particulate material comprises copper and cupric sulfate.
Claim 12
Dependent Claim
36 words
An intrauterine device having a composition in accordance with claim 12, wherein the material comprising said plastic matrix has a water permeability of at least 0.3 grams/100 square inches/24 hours/mil at a temperature of 25* Centigrade.
Claim 13
Dependent Claim
36 words
An intrauterine device having a composition in accordance with claim 12, wherein the material comprising said plastic matrix has a water permeability of at least 10 grams/100 square inches/24 hours/mil at a temperature of 25* Centigrade.
Claim 14
Dependent Claim
69 words
An intrauterine contraceptive device made from a composition material as defined in claim 12, enabling flexing to conform to the uterine cavity, further comprising: a central body having a perimeter portion with nose, tail and side portions and encompassing an area which can be contained within a normal uterus, and at least three spaced apart short spurs on each of said side portions extending outwardly from sAid perimeter portion.
Claim 15
Dependent Claim
61 words
An intrauterine contraceptive device made from a composition material as defined in claim 12, enabling flexing to conform to the uterine cavity, further comprising; a ring-like perimeter portion having a nose portion and opposite therefrom a tail portion with side portions joining said nose and tail portions; and a plurality of spur-like retaining means extending outwardly from each said side portion.
Claim 16
Dependent Claim
88 words
An intrauterine device having a body structure encompassing an area which can be contained within a normal uterus, made from a composition enabling flexing to conform to the uterine cavity comprising: a plastic matrix, and a particulate material comprising at least copper and at least one salt of a metal selected from a group consisting of copper, zinc, silver, platinium and cadmium; said particulate material being dispersed within said plastic matrix; and said particulate material comprising between 0.1% to 10% by weight of the composition of said device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |