Patent US3659596A successfully refreshed from Google Patents.
US3659596A
Expired / Lapsed
US
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Intrauterine element
Assignee: Individual
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Filing: 1969-11-06
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Granted: 1972-05-02
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Expires: 1989-11-06
Abstract
Abstract An intrauterine contraceptive device has a continuous loop as a part thereof which is closed by a membrane of thin, pliable material. By use of a double layer and by selection of a permeable material for the membrane, it serves also to support a capsule containing a biological agent and a substance for slowly releasing the agent into the uterus.
Inventors
- 👤 Ralph R Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:48
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
An intrauterine device of flexible material comprising: an elongated continuous loop having convex, outermost surfaces adapted to complementally engage the walls of the uterus at the mouth thereof, said loop having a transverse axis spanning the distance across the uterus inwardly of said mouth, and a longitudinal axis provided with a lower vertex for engaging the walls of the uterus in said mouth and an upper vertex within the uterus spaced inwardly from the walls of the uterus; a pair of elements extending laterally in opposite directions from said upper vertex for engaging the walls of the uterus within the mouths of the fallopian tubes; a membrane closing said loop; and a permeable capsule carried by the membrane and Containing a biological agent, the membrane being permeable, the agent-containing portion of the capsule being a part of the membrane, said membrane being a double layer of thin, pliable material, said agent being between said layers.
Claim 2
Dependent Claim
155 words
An intrauterine device of flexible material comprising: an elongated continuous loop having convex, outermost surfaces adapted to complementally engage the walls of the uterus at the mouth thereof, said loop having a transverse axis spanning the distance across the uterus inwardly of said mouth, and a longitudinal axis provided with a lower vertex for engaging the walls of the uterus in said mouth and an upper vertex within the uterus spaced inwardly from the walls of the uterus; a pair of elements extending laterally in opposite directions from said upper vertex for engaging the walls of the uterus within the mouths of the fallopian tubes; a membrane closing said loop; and a permeable capsule carried by the membrane and Containing a biological agent, the membrane being permeable, the agent-containing portion of the capsule being a part of the membrane, said membrane being a double layer of thin, pliable material, said agent being between said layers.
Claim 3
Dependent Claim
27 words
A device as claimed in claim 1 wherein said loop has a pair of opposed, concavo-convex arches, said membrane spanning the distance between and interconnecting said arches.
Claim 4
Dependent Claim
20 words
A device as claimed in claim 2 wherein said agent is centrally located between the arches and between said vertexes.
Claim 5
Dependent Claim
21 words
A device as claimed in claim 3 wherein said capsule contains a substance for slowly releasing said agent into the uterus.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |