US5258014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical suture and process for producing same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1991-04-05
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Granted: 1993-11-02
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Expires: 2011-04-05
Abstract
Abstract A surgical suture and a process for producing the same are disclosed, which surgical suture comprising a porous body of polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous.
Inventors
- 👤 Akira Harada
- 👤 Hiroshi Mano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:56
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/08; D01F6/12; A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06166; A61L; A61L17/00; A61L17/06; A61L17/10; B; B29; B29C; B29C48/00; B29C48/022; B29C55/00; B29C55/005; B29C48/03; B29C48/05; B29C48/07; B29K; B29K2027/00; B29K2027/12; B29K2027/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
27 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous.
Claim 2
Dependent Claim
27 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous.
Claim 3
Dependent Claim
79 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous, being prepared by the steps of: extruding a polytetrafluoroethylene paste to make an unsintered shape; stretching said unsintered shape at a temperature not higher than the melting point of the polytetrafluoroethylene to form a stretched shape; sintering said stretched shape; and drawing the resultant sintered stretched shape into a filament through dies.
Claim 4
Dependent Claim
79 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous, being prepared by the steps of: extruding a polytetrafluoroethylene paste to make an unsintered shape; stretching said unsintered shape at a temperature not higher than the melting point of the polytetrafluoroethylene to form a stretched shape; sintering said stretched shape; and drawing the resultant sintered stretched shape into a filament through dies.
Claim 5
Dependent Claim
82 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous, being prepared by the steps of: extruding a polytetrafluoroethylene paste to make an unsintered shape; stretching said unsintered shape at a temperature not higher than the melting point of the polytetrafluoroethylene; drawing the shape into a filament through dies at a temperature not higher than the melting point of the polytetrafluoroethylene; and sintering said filament.
Claim 6
Dependent Claim
82 words
A surgical suture comprising a porous body of sintered polytetrafluoroethylene having an outer circumference that is substantially free of pores, with only the interior being made porous, being prepared by the steps of: extruding a polytetrafluoroethylene paste to make an unsintered shape; stretching said unsintered shape at a temperature not higher than the melting point of the polytetrafluoroethylene; drawing the shape into a filament through dies at a temperature not higher than the melting point of the polytetrafluoroethylene; and sintering said filament.
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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) | 1996-11-01 | 1997-05-03 | 1997-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-11-01 | 2001-05-03 | 2001-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-11-01 | 2005-05-03 | 2005-11-02 | $7700.00 | Window Closed / Lapsed |