US3918443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for birth control
Assignee: Ethyl Corp
•
Filing: 1973-08-27
•
Granted: 1975-11-11
•
Expires: 1993-08-27
Abstract
Abstract A method and apparatus for birth control utilizing an intrauterine contraceptive device which includes a preformed, hollow body with thin, flexible walls, the hollow body having the approximate size and shape of the uterine cavity. A flexible, compressible, filler material substantially completely fills the hollow body so that the walls of the hollow body make contact with a major portion of the walls of the uterine cavity when the device is in position within the uterine cavity. In a preferred form, the hollow body is filled with a polymerizable organosiloxane material after being placed in the uterine cavity and the material is then polymerized to produce a device having substantially the size and shape of a normal uterine cavity.
Inventors
- 👤 William O Vennard
- 👤 Jack C Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
THE METHOD OF BIRTH CONTROL WHICH INCLUDES: POSITIONING AN INFLATABLE, NON-IRRITATING, FLEXIBLE, HOLLOW BODY SUBSTANTIA ALLY WITHIN THE UTERINE CAVITY, SAID BODY BEING FORMED FROM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLODDONE, POLYCELLULOSICS, AND POLYVINYL ALCOHOL, WHICH MATERIAL IS SOLUBLE IN FLUIDS NORMALLY PRESENT IN THE UTERINE AVITY, FILLING SAID HOLLOW BODY WITH A LIQUID POLYMERIZABLE PREPOLYMER OR MONOMER TO PRODUCE A FLEXIBLE, COMPRESSIBLE INTRAUTERINE CONTRACEPTIVE DEVICE HAVING THE SHAPE OF THE UTERUS, AND DISSOLVING SAID HOLLOW BODY WITH UTERINE FLUIDS.
Claim 2
Independent Claim
84 words
THE METHOD OF BIRTH CONTROL WHICH INCLUDES: POSITIONING AN INFLATABLE, NON-IRRITATING, FLEXIBLE, HOLLOW BODY SUBSTANTIA ALLY WITHIN THE UTERINE CAVITY, SAID BODY BEING FORMED FROM A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLODDONE, POLYCELLULOSICS, AND POLYVINYL ALCOHOL, WHICH MATERIAL IS SOLUBLE IN FLUIDS NORMALLY PRESENT IN THE UTERINE AVITY, FILLING SAID HOLLOW BODY WITH A LIQUID POLYMERIZABLE PREPOLYMER OR MONOMER TO PRODUCE A FLEXIBLE, COMPRESSIBLE INTRAUTERINE CONTRACEPTIVE DEVICE HAVING THE SHAPE OF THE UTERUS, AND DISSOLVING SAID HOLLOW BODY WITH UTERINE FLUIDS.
Claim 3
Dependent Claim
21 words
The method of claim 1 including foaming said prepolymer or monomer prior to polymerizing to produce a cellular intrauterine contraceptive device.
Claim 4
Independent Claim
149 words
A method of birth control including: positioning an empty, preformed, intrauterine contraceptive device within the uterine cavity, said device comprising a preformed hollow body having a shape approximating an equilateral triangle with a continuous, imperforate top wall joined at its periphery to a continuous, imperforate bottom wall, said walls being formed of a thin, flexible material and being connected to each other by connector stem means at one or more points intermediate their peripheries to limit expansion of said body; means defining an opening in one of the apices of said hollow body for filling and emptying said hollow body; means closing said opening; and expanding said device by substantially filling said hollow body with a flexible, compressible, filler material whereby the walls of said body will make contact with a major portion of the walls of said uterine cavity when said device is positioned in said uterine cavity.
Claim 5
Independent Claim
149 words
A method of birth control including: positioning an empty, preformed, intrauterine contraceptive device within the uterine cavity, said device comprising a preformed hollow body having a shape approximating an equilateral triangle with a continuous, imperforate top wall joined at its periphery to a continuous, imperforate bottom wall, said walls being formed of a thin, flexible material and being connected to each other by connector stem means at one or more points intermediate their peripheries to limit expansion of said body; means defining an opening in one of the apices of said hollow body for filling and emptying said hollow body; means closing said opening; and expanding said device by substantially filling said hollow body with a flexible, compressible, filler material whereby the walls of said body will make contact with a major portion of the walls of said uterine cavity when said device is positioned in said uterine cavity.
Claim 6
Dependent Claim
24 words
The method of claim 3 wherein said filler material is selected from the group consisting of water, mineral oil, silicone fluids and saline solutions.
Claim 7
Dependent Claim
22 words
The method of claim 3 wherein said filler material contains a member selected from the group consisting of bacteriostats, medicaments, and fragrances.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |