US4636219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prosthesis device fabrication
Assignee: ANSPACH MANUFACTURING Inc
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Filing: 1985-12-05
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Granted: 1987-01-13
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Expires: 2005-12-05
Abstract
Abstract A process is disclosed for fabricating a biocompatible mesh screen structure for bonding to a prosthetic substrate. The process comprises providing from four to eight layers of a mesh comprising a titanium alloy and subjecting the layered structure to a temperature below the beta-transformation temperature of the alloy and a pressure of about 1300 to 1500 psi. The heating and pressing are carried out in a furnace maintained at a temperature of about 1600° to 1725° F., which is evacuated to a vacuum of less than about 10 -4 torr. The process of the invention provides a product retaining the strength of the alloy and having a well-characterized pore structure. Further, the layered mesh composite may be bonded to a thin substrate and readily formed into complex shapes.
Inventors
- 👤 Clyde R. Pratt
- 👤 Roger G. Carignan
- 👤 Charles M. Raggio
- 👤 Chuck P. Woznick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:45
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/02; A61L31/022; A61B; A61B90/00; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; B; B22; B22F; B22F3/00; B22F3/002; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30009; A61F2002/30316; A61F2002/30317; A61F2002/30322; A61F2/30721; A61F2002/30733; A61F2/30771; A61F2002/30795; A61F2002/30805; A61F2002/30909; A61F2002/30915; A61F2002/30929; A61F2/3094; A61F2/30942; A61F2002/3096; A61F2002/30967; A61F2002/30968; A61F2/34; A61F2002/3453; A61F2002/3462; A61F2002/3466; A61F2250/00; A61F2250/0014; A61F2250/0026; A61F2250/0028; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00389; A61F2310/00395; A61F2310/00407; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12347; Y10T428/12444; Y10T428/12479
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
89 words
A process of fabricating a biocompatible mesh screen structure for bonding to a prosthetic substrate, the process comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy; and (b) subjecting the layered structure to a processing temperature below the beta-transformation temperature of said alloy and a pre-determined pressure for a pre-selected period of time, the heating and pressing being carried out in a vacuum furnace maintained at a temperature of about 25° to 125° F. above said processing temperature and at a pre-determined vacuum.
Claim 2
Dependent Claim
89 words
A process of fabricating a biocompatible mesh screen structure for bonding to a prosthetic substrate, the process comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy; and (b) subjecting the layered structure to a processing temperature below the beta-transformation temperature of said alloy and a pre-determined pressure for a pre-selected period of time, the heating and pressing being carried out in a vacuum furnace maintained at a temperature of about 25° to 125° F. above said processing temperature and at a pre-determined vacuum.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said alloy comprises a member selected from the group consisting of commercially pure titanium and Ti-6Al-4V.
Claim 4
Dependent Claim
48 words
The process of claim 2 wherein said processing temperature is at least about 1600° F., said pre-determined pressure ranges from about 1300 to 1500 psi, said pre-selected period of time ranges from about 12 to 24 minutes and said pre-determined vacuum is less than about 10 -4 torr.
Claim 5
Dependent Claim
108 words
A process for fabricating a biocompatible mesh screen structure for bonding to a prosthetic substrate, the processing comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy; and (b) subjecting the layered structure to a processing temperature below the beta-transformation temperature of said alloy and a pressure of about 1300 to 1500 psi for a period of time of about 12 to 24 min, the heating and pressing being carried out in a furnace maintained at a temperature ranging from about 1600° to 1725° F., depending upon the alloy, said furnace evacuated to provide a vacuum of less than about 10 -4 torr.
Claim 6
Dependent Claim
108 words
A process for fabricating a biocompatible mesh screen structure for bonding to a prosthetic substrate, the processing comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy; and (b) subjecting the layered structure to a processing temperature below the beta-transformation temperature of said alloy and a pressure of about 1300 to 1500 psi for a period of time of about 12 to 24 min, the heating and pressing being carried out in a furnace maintained at a temperature ranging from about 1600° to 1725° F., depending upon the alloy, said furnace evacuated to provide a vacuum of less than about 10 -4 torr.
Claim 7
Dependent Claim
22 words
The process of claim 4 wherein said mesh comprises a member selected from the group consisting of commercially pure titanium and Ti-6Al-4V.
Claim 8
Dependent Claim
22 words
The process of claim 5 wherein said processing temperature is about 1600° for commercially pure Ti and about 1650° F. for Ti-6Al-4V.
Claim 9
Dependent Claim
19 words
The process of claim 4 wherein the pore size of said mesh ranges from about 15 to 860 micrometers.
Claim 10
Dependent Claim
13 words
The process of claim 7 wherein said pore size averages about 235 micrometers.
Claim 11
Dependent Claim
19 words
The process of claim 4 wherein said mesh is comprised of wires having a diameter of about 0.01 inch.
Claim 12
Dependent Claim
17 words
The process of claim 4 wherein each layer is biased 45° with respect to its neighboring layers.
Claim 13
Dependent Claim
8 words
Product produced by the process of claim 4.
Claim 14
Dependent Claim
109 words
A process for fabricating a biocompatible mesh screen structure bonded to a prosthetic substrate comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy: (b) providing a substrate of a titanium alloy; and (c) subjecting the structure to a processing temperature below the beta-transformation temperature of said alloy and a pressure of about 1300 to 1500 psi for a period of time of about 12 to 24 minutes, the heating and pressing being carried out at a furnace maintained at a temperature ranging from about 1600° to 1725° F., said furnace being evacuated to provide a vacuum of less than about 10 -4 torr.
Claim 15
Dependent Claim
109 words
A process for fabricating a biocompatible mesh screen structure bonded to a prosthetic substrate comprising: (a) providing from four to eight layers of a mesh comprising a titanium alloy: (b) providing a substrate of a titanium alloy; and (c) subjecting the structure to a processing temperature below the beta-transformation temperature of said alloy and a pressure of about 1300 to 1500 psi for a period of time of about 12 to 24 minutes, the heating and pressing being carried out at a furnace maintained at a temperature ranging from about 1600° to 1725° F., said furnace being evacuated to provide a vacuum of less than about 10 -4 torr.
Claim 16
Dependent Claim
23 words
The process of claim 12 wherein said titanium alloy comprises a member selected from the group consisting of commercially pure titanium and Ti-6Al-4V.
Claim 17
Dependent Claim
23 words
The process of claim 13 wherein said processing temperature is about 1600° F. for commercially pure Ti and about 1650° F. for Ti-6Al-4V.
Claim 18
Dependent Claim
13 words
The process of claim 12 wherein said prosthetic substrate comprises a titanium alloy.
Claim 19
Dependent Claim
8 words
Product produced by the process of claim 12.
References Cited (Backward Citations)
US4088258A
Cited
US4570271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |