Patent US1645850A successfully refreshed from Google Patents.
US3937217A
Expired / Lapsed
US
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Intrauterine contraceptive device
Assignee: Huhtamaki Oyj
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Filing: 1974-03-08
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Granted: 1976-02-10
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Expires: 1994-03-08
Abstract
Abstract An intrauterine contraceptive device, resembling the shape of T, deviating from that, however, by having in the end of a vertical arm a loop which is easy to compress for insertion and having in the upper end of the vertical arm two arms departing to opposite sides and jointed smoothly to the vertical arm so that the bending radius is relatively big, the angle between the horizontal and vertical arm being preferably smaller than 90°.
Inventors
- 👤 Ahti A. Kosonen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:58
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to the stem along a smoothly bent curved portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, said smoothly bent curved portion being bent on a sufficient radius of curvature for prevention of plastic deformation when said arms are bent into general alignment with said stem during loading of the device into an inserter tube, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, a portion of said stem adjacent said compressible loop being of reduced thickness.
Claim 2
Dependent Claim
130 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to the stem along a smoothly bent curved portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, said smoothly bent curved portion being bent on a sufficient radius of curvature for prevention of plastic deformation when said arms are bent into general alignment with said stem during loading of the device into an inserter tube, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, a portion of said stem adjacent said compressible loop being of reduced thickness.
Claim 3
Dependent Claim
25 words
The intrauterine contraceptive device of claim 1 in which a tip of each said arm is enlarged with respect to the remainder of the arm.
Claim 4
Dependent Claim
16 words
The intrauterine device of claim 1 wherein tip portions of said arms are rounded in shape.
Claim 5
Dependent Claim
147 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to the stem along a smoothly bent curved portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, said smoothly bent curved portion being bent on a sufficient radius of curvature for prevention of plastic deformation when said arms are bent into general alignment with said stem during loading of the device into an inserter tube, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, wherein said loop and a portion of said stem adjacent said loop are thinner than the rest of said stem for increased flexibility in response to pressure on the device.
Claim 6
Dependent Claim
147 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to the stem along a smoothly bent curved portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, said smoothly bent curved portion being bent on a sufficient radius of curvature for prevention of plastic deformation when said arms are bent into general alignment with said stem during loading of the device into an inserter tube, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, wherein said loop and a portion of said stem adjacent said loop are thinner than the rest of said stem for increased flexibility in response to pressure on the device.
Claim 7
Dependent Claim
91 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to said stem along a smoothly curved bent portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, a portion of said stem adjacent said loop being of reduced thickness.
Claim 8
Dependent Claim
91 words
An intrauterine contraceptive device for placement within the uterine cavity having a normally generally T-shaped configuration with a stem having two outwardly extending arms joined to said stem along a smoothly curved bent portion, said curved portion being flexible, said arms normally extending at acute angles with respect to said stem, and having a compressible loop at an end of said stem axially remote from said arms for supporting the device on the upper edges of the cervical os, a portion of said stem adjacent said loop being of reduced thickness.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |