US3785376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intrauterine device
Assignee: Tecna Corp
•
Filing: 1971-11-03
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Granted: 1974-01-15
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Expires: 1991-11-03
Abstract
Abstract An intrauterine device has an inflatable envelope of thin, flexible, substantially non-stretchable material. A skirt of a single thickness of thin, flexible material extends outwardly from the periphery of the envelope for from one-half to one centimeter and substantially all around the envelope.
Inventors
- 👤 S Kitrilakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
An intrauterine device consisting of thin, flexible substantially non-stretchable material formed in the shape of an envelope having a boundary and of a size to contact a large part but not all of a uterine cavity, a flexible tube communicating with the interior of said envelope and united with said envelope for conducting liquid to the interior of said envelope, and a skirt of material of a comparable kind extending outwardly from said boundary to an extent to cover a remaining part of said uterine cavity, said envelope being a maximum of 28 millimeters wide, a maximum of 22 millimeters long and when inflated about 2 to 3 millimeters thick, and said skirt extending from about 1/2 centimeter to about 1 centimeter from said boundary.
Claim 2
Dependent Claim
125 words
An intrauterine device consisting of thin, flexible substantially non-stretchable material formed in the shape of an envelope having a boundary and of a size to contact a large part but not all of a uterine cavity, a flexible tube communicating with the interior of said envelope and united with said envelope for conducting liquid to the interior of said envelope, and a skirt of material of a comparable kind extending outwardly from said boundary to an extent to cover a remaining part of said uterine cavity, said envelope being a maximum of 28 millimeters wide, a maximum of 22 millimeters long and when inflated about 2 to 3 millimeters thick, and said skirt extending from about 1/2 centimeter to about 1 centimeter from said boundary.
Claim 3
Dependent Claim
16 words
A device as in claim 1 in which said skirt is a single thickness of material.
Claim 4
Dependent Claim
30 words
A device as in claim 1 in which said envelope and said skirt when collapsed and folded can fit into a circular-cylindrical configuration less than about three millimeters in diameter.
Claim 5
Dependent Claim
91 words
An intrauterine device consisting of a body having a wall structure arranged to define a hollow, flexible envelope of such a side as to fit within and contact a large part but not all of a uterine cavity and having a periphery of a predetermined shape in plan, means for conducting liquid to the interior of said envelope, and a thin, flexible skirt integral with and extending outwardly from said envelope all around the periphery thereof and having a width outwardly of said envelope about equal to that of said envelope.
Claim 6
Dependent Claim
91 words
An intrauterine device consisting of a body having a wall structure arranged to define a hollow, flexible envelope of such a side as to fit within and contact a large part but not all of a uterine cavity and having a periphery of a predetermined shape in plan, means for conducting liquid to the interior of said envelope, and a thin, flexible skirt integral with and extending outwardly from said envelope all around the periphery thereof and having a width outwardly of said envelope about equal to that of said envelope.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |