US4562835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Streamlined T-shaped intrauterine device
Assignee: Ortho Pharmaceutical Canada Ltd
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Filing: 1984-01-23
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Granted: 1986-01-07
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Expires: 2004-01-23
Abstract
Abstract An intrauterine contraceptive device of a Tatum T shape which carries copper sleeves on its arms wherein the arm portion carrying the sleeve is of a smaller diameter than the remaining portion of the arm. This arrangement allows for minimization or elimination of an exposed and elevated copper sleeve edge which may abrade the uterus on insertion and/or removal.
Inventors
- 👤 Gregory K. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/14; A61F6/142; A61F6/144
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A T-shaped intrauterine contraceptive device comprising a stem, a left arm and a right arm, each of said stem and arms having an essentially circular cross-section, wherein the arms each comprise: a first portion; and a second portion which has a diameter smaller than the first portion and is located at the terminus of the arm; and a length of copper tubing disposed on the second portion of each of said arms and attached thereto, the outside diameter of said copper tubing being equal to the outside diameter of said first portion of each of said arms.
Claim 2
Dependent Claim
97 words
A T-shaped intrauterine contraceptive device comprising a stem, a left arm and a right arm, each of said stem and arms having an essentially circular cross-section, wherein the arms each comprise: a first portion; and a second portion which has a diameter smaller than the first portion and is located at the terminus of the arm; and a length of copper tubing disposed on the second portion of each of said arms and attached thereto, the outside diameter of said copper tubing being equal to the outside diameter of said first portion of each of said arms.
Claim 3
Dependent Claim
21 words
The device of claim 1, wherein the diameter of said first portion is approximately equal to the diameter of the stem.
Claim 4
Dependent Claim
26 words
The device of claim 1, wherein said length of copper tubing is disposed along about 1/4 to 1/2 of the length of each of said arms.
Claim 5
Dependent Claim
22 words
The device of claim 1, wherein said length of copper tubing is affixed to said arm with a crimp in said tubing.
Claim 6
Dependent Claim
23 words
The device of claim 1, wherein said second portion of each of said arms is slightly longer than the length of copper tubing.
Claim 7
Dependent Claim
20 words
The device of claim 5, wherein the length of copper tubing abutts the first portion of each of said arms.
Claim 8
Dependent Claim
20 words
The device of claim 1, wherein said device further comprises a length of copper wire wound helically around said stem.
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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |