Patent US2270659A successfully refreshed from Google Patents.
Patent US4052754A successfully refreshed from Google Patents.
US4052754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implantable structure
Assignee: TRANQUIL PROSPECTS Ltd A Co OF BRITISH VIRGIN ISLANDS
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Filing: 1976-07-14
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Granted: 1977-10-11
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Expires: 1996-07-14
Abstract
Abstract A structure for in vivo implantation which includes an elongate section terminating in one end in an enlarged portion and being at least partially of a biocompatible porous material having characteristics of promoting ingrowth of tissue. The structure is adapted to be implanted in place of at least a portion of the bony chain of the middle ear, to serve as a plug for a tube, or to serve as an implant electrode. The same structure including a means for closing the pores of the intermediate portion of such structure may be used in place of all or a portion of the bony chain between the ear drum and the vestibule.
Inventors
- 👤 Charles A. Homsy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:59
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/18; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61F2002/183
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
67 words
A structure for in vivo implantation, comprising an elongate biocompatible, porous element, said porous element having at least a portion of its length compressed so that the surface pores along said portion are closed, one projecting end of said element being enlarged and having open pores throughout to allow tissue ingrowth therein, said porous element having the characteristics of promoting ingrowth of living tissue therein when implanted.
Claim 2
Dependent Claim
67 words
A structure for in vivo implantation, comprising an elongate biocompatible, porous element, said porous element having at least a portion of its length compressed so that the surface pores along said portion are closed, one projecting end of said element being enlarged and having open pores throughout to allow tissue ingrowth therein, said porous element having the characteristics of promoting ingrowth of living tissue therein when implanted.
Claim 3
Dependent Claim
34 words
A structure according to claim 1, wherein said element includes a stem and a pad, said pad being the enlarged end of said element, said stem extending from the central portion of said pad.
Claim 4
Dependent Claim
29 words
A structure according to claim 2 wherein said stem has a transverse dimension between 0.25 and 3 millimeters, and said pad's largest dimension is between 0.5 and 8 millimeters.
Claim 5
Dependent Claim
46 words
A structure according to claim 2 wherein said structure is adapted to be implanted in place of at least a portion of the bony chain of the middle ear, and said stem is sufficiently long to approximate the dimension of the bony chain which it replaces.
Claim 6
Dependent Claim
55 words
A structure according to claim 2 wherein said structure is adapted to be implanted into the end of a fallopian tube opening into the uterus, and said stem is of sufficient dimension to prevent its displacement from its initial implanted position until tissue ingrowth has progressed sufficiently to secure such structure in its implanted position.
Claim 7
Dependent Claim
23 words
A structure according to claim 5 wherein the exterior of said stem is formed as ridges to resist movement from its implanted position.
Claim 8
Dependent Claim
14 words
A structure according to claim 1, including means for closing said closed surface pores.
Claim 9
Dependent Claim
18 words
A structure according to claim 7 wherein both ends of said element project beyond said pore closing means.
Claim 10
Dependent Claim
23 words
A structure according to claim 7 wherein said pore closing means is a fluoroethylene propylene tube which is heat shrunk onto said element.
Claim 11
Dependent Claim
25 words
A structure according to claim 1 wherein the end of said element extending beyond said closed surface pores is divided into a plurality of leaves.
Claim 12
Dependent Claim
43 words
A structure according to claim 1 wherein the end of said element extending beyond said closed surface pores is enlarged in one dimension to form a flat bulbous end portion with sufficient flexibility to bend at substantially a right angle to said element.
Claim 13
Dependent Claim
20 words
A structure according to claim 1 including a wire connected to and extending from said projecting end of said element.
Claim 14
Dependent Claim
35 words
A structure according to claim 1 including a pad of porous ingrowth promoting material, and means for bonding said pad to the end of said element opposite the end projecting beyond said closed surface pores.
Claim 15
Dependent Claim
24 words
A structure according to claim 1 wherein the enlarged end of said element is frusto-conical in shape with the larger end thereof facing outwardly.
Claim 16
Dependent Claim
33 words
A structure according to claim 14 wherein said structure is for a stapes replacement and said outer end includes a shallow recess for receiving a portion of the bony chain therein when implanted.
Claim 17
Dependent Claim
40 words
A structure according to claim 1 wherein said structure is of material having the property of conducting electric current, and including means connected to said material for feeding electric current to said structure when it is implanted as an electrode.
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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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |