US4578080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint prostheses
Assignee: Corin Medical Ltd
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Filing: 1983-09-08
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Granted: 1986-03-25
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Expires: 2003-09-08
Abstract
Abstract A finger knuckle joint prosthesis includes an elastomeric main body comprised of a central hinging part and two intramedullary stems. Extending from the main body towards the thumb is an integral strip. An integral tendon-retaining flap extends from the opposite side of the body, and a channel extends along between the strip and the flap for receiving one-third of a slit leader of a finger, the other two-thirds of which press the flap face-to-face against the strip.
Inventors
- 👤 Basil H. Helal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:52
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/42; A61F2/4241; A61F2/30721; A61F2/08; A61F2/0811; A61F2/3094; A61F2/30965; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30563; A61F2002/4251
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A joint prosthesis, comprising: an elongated body of resilient biocompatible material having an enlarged main part for positioning between two bones of a joint, first and second intermedullary stems projecting from respective opposite points of said main part, tendon retaining means for retaining at least a portion of a tendon, said tendon-retaining means comprises a flap integrally connected to said main part and adapted to lie thereover defining a continuous channel therebetween for receiving and slidably guiding at least part of the tendon, where the tendon is positionally stabilized relative to said main part and is contiguous with said main part.
Claim 2
Dependent Claim
101 words
A joint prosthesis, comprising: an elongated body of resilient biocompatible material having an enlarged main part for positioning between two bones of a joint, first and second intermedullary stems projecting from respective opposite points of said main part, tendon retaining means for retaining at least a portion of a tendon, said tendon-retaining means comprises a flap integrally connected to said main part and adapted to lie thereover defining a continuous channel therebetween for receiving and slidably guiding at least part of the tendon, where the tendon is positionally stabilized relative to said main part and is contiguous with said main part.
Claim 3
Dependent Claim
34 words
A prosthesis according to claim 1 where said flap is held against said main part by an elongated portion of the tendon and the remaining portion of the tendon is located in the channel.
Claim 4
Dependent Claim
32 words
A prosthesis according to claim 1 where said tendon retaining means further comprises a strip member attached to and projecting from said main part which is capable of coacting with said flap.
Claim 5
Dependent Claim
19 words
A prosthesis according to claim 3 further comprising a relatively flexible reinforcing core element incorporated in said strip member.
Claim 6
Dependent Claim
19 words
A prosthesis according to claim 1 further comprising a relatively flexible reinforcing core element incorporated in said tendon-retaining means.
Claim 7
Dependent Claim
121 words
A finger joint prosthesis, comprising: (a) an elongated body of resilient biocompatible material having a main part for positioning between two bones of the joint, first and second intermedullary stems projecting from respective opposite points of said main part, (b) tendon-retaining means for positionally stabilizing a tendon, said tendon retaining means being formed integrally with said main part, said tendon retaining means comprising an elongated flap member wherein said flap member is contiguous with an outer surface of said main part and separated therefrom by a continuous channel such that at least a portion of the tendon is secured in said channel between said flap member and said main part, to stabilize the positon of said tendon relative to said body.
Claim 8
Dependent Claim
121 words
A finger joint prosthesis, comprising: (a) an elongated body of resilient biocompatible material having a main part for positioning between two bones of the joint, first and second intermedullary stems projecting from respective opposite points of said main part, (b) tendon-retaining means for positionally stabilizing a tendon, said tendon retaining means being formed integrally with said main part, said tendon retaining means comprising an elongated flap member wherein said flap member is contiguous with an outer surface of said main part and separated therefrom by a continuous channel such that at least a portion of the tendon is secured in said channel between said flap member and said main part, to stabilize the positon of said tendon relative to said body.
Claim 9
Dependent Claim
29 words
A prosthesis according to claim 6 where said main part includes a strip member which cooperates with said flap member to secure at least a portion of said tendon.
Claim 10
Dependent Claim
17 words
A prosthesis according to claim 6 where said tendon-retaining means incorporates a relatively flexible reinforcing core element.
References Cited (Backward Citations)
US3462765A
Cited
US3577837A
Cited
US3545008A
Cited
US3739403A
Cited
US3745590A
Cited
US3818513A
Cited
US4158893A
Cited
US4204284A
Cited
US4313232A
Cited
US4246662A
Cited
US4367562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |