Patent US4976909A successfully refreshed from Google Patents.
US4976909A
Expired / Lapsed
US
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Method for manufacture of surgical fastening device
Assignee: Ethicon Inc
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Filing: 1987-02-09
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Granted: 1990-12-11
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Expires: 2007-02-09
Abstract
Abstract A tissue fastening device comprising (a) a fastener member having a pair of legs extending from the same side of a connecting cross piece, said fastener member adapted to be placed on one side of the tissue to be joined with the legs penetrating the tissue, said fastener member being an oriented crystalline polymeric material, whereby the fastener member has sufficient inherent strength and stiffness so said legs can penetrate the tissue to be fastened, and (b) a receiver member to secure said fastener member in place. The fastener member is formed by forming an oriented polymeric filament into the configuration of the fastener member, and annealing the filament while in such configuration while it is being restrained so as to prevent shrinkage.
Inventors
- 👤 Glen C. Dorband
- 👤 Alfred Liland
- 👤 Edgar Menezes
- 👤 Peter Steinheuser
- 👤 Nicholas M. Popadiuk
- 👤 Stephen J. Failla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:05
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/02; A; A61; A61B; A61B17/00; A61B17/064; A61B17/0643; A61L; A61L31/00; A61L31/04; A61L31/06; A61L31/14; A61L31/148; B29C55/00; B29C55/005; B29C69/00; B29C69/001; B29C69/002; B29C69/003; A61F; A61F2/00; A61F2/0059; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30084; B29K; B29K2067/00; B29L; B29L2031/00; B29L2031/727; B29L2031/753
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
156 words
Process for producing a fastener member having a pair of legs extending from the same side of a connecting cross piece, said fastener member being adapted to be placed on one side of tissue to be joined with the legs penetrating the tissue, said fastener member being an oriented crystalline polymeric material, whereby the fastener member has sufficient inherent strength and stiffness so said legs can penetrate the tissue to be fastened, and said fastener member being adapted to mate with a receiver member to secure said fastener member in place, which process comprises forming an oriented polymeric filament into the configuration of said fastener member, annealing the thus formed filament at a temperature between the glass transition and melting temperatures of said polymer while restraining said filament from shrinking, and cooling the filament to a temperature below the glass transition temperature of said polymer while maintaining said filament under such restraint in the said configuration.
Claim 2
Dependent Claim
156 words
Process for producing a fastener member having a pair of legs extending from the same side of a connecting cross piece, said fastener member being adapted to be placed on one side of tissue to be joined with the legs penetrating the tissue, said fastener member being an oriented crystalline polymeric material, whereby the fastener member has sufficient inherent strength and stiffness so said legs can penetrate the tissue to be fastened, and said fastener member being adapted to mate with a receiver member to secure said fastener member in place, which process comprises forming an oriented polymeric filament into the configuration of said fastener member, annealing the thus formed filament at a temperature between the glass transition and melting temperatures of said polymer while restraining said filament from shrinking, and cooling the filament to a temperature below the glass transition temperature of said polymer while maintaining said filament under such restraint in the said configuration.
Claim 3
Dependent Claim
35 words
The process of claim 1 wherein the forming of the oriented polymeric filament into the configuration of the fastener member includes the step of winding said filament around a forming bar having a rectangular cross-section.
Claim 4
Dependent Claim
19 words
The process of claim 2 further including the step of clamping the wound filament against the said forming bar.
Claim 5
Dependent Claim
17 words
Process of claim 1 wherein the stress-strain curve of said oriented polymeric filament exhibits no yield point.
Claim 6
Dependent Claim
17 words
Process of claim 1 wherein the polymer from which said filament is made is an absorbable polymer.
Claim 7
Dependent Claim
12 words
Process of claim 5 wherein the absorbable polymer is a lactide/glycolide copolymer.
Claim 8
Dependent Claim
14 words
Process of claim 5 wherein the absorbable polymer is a 90/10, mol/mol, glycolide/lactide copolymer.
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) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |