Patent US5332626A successfully refreshed from Google Patents.
US5332626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pores of controlled geometry on a thermoplastic polymer
Assignee: Vitaphore Corp
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Filing: 1993-01-25
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Granted: 1994-07-26
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Expires: 2013-01-25
Abstract
Abstract A process is provided for manufacturing nonwoven, nonbiodegradable tissue ingrowth-inducing, tissue-interfacing substrates with predetermined oriented uniform pore diameter, pore density and pore depth. Pins are inserted to a predetermined depth into a softened thermoplastic substrate or, heated pins are inserted into the substrate, then removed to form the predetermined pore pattern.
Inventors
- 👤 Stanley R. Conston
- 👤 Glenn C. Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:03
CPC Classifications
B; B26; B26F; B26F3/00; B26F3/06; A; A61; A61F; A61F2/00; A61F2/0077; B26F1/00; B26F1/24; B26F3/08; Y; Y10; Y10S; Y10S525/00; Y10S525/937; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24479; Y10T428/249921; Y10T428/249953; Y10T428/249961; Y10T428/249975; Y10T428/249978; Y10T428/31; Y10T428/31504; Y10T428/31507; Y10T428/31551; Y10T428/31786
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A nonwoven, nonbiodegradable tissue ingrowth-inducing, tissue-interfacing thermoplastic substrate having surface pores of a substantially uniform density, diameter and depth, said pore density in the range of about 20 to 10,000 pores per square centimeter; said uniform pore diameter being in the range of about 50 to 500 microns, said pores characterized by substantially cylindrical shape with substantially flat or slightly curved bottom surfaces.
Claim 2
Dependent Claim
63 words
A nonwoven, nonbiodegradable tissue ingrowth-inducing, tissue-interfacing thermoplastic substrate having surface pores of a substantially uniform density, diameter and depth, said pore density in the range of about 20 to 10,000 pores per square centimeter; said uniform pore diameter being in the range of about 50 to 500 microns, said pores characterized by substantially cylindrical shape with substantially flat or slightly curved bottom surfaces.
Claim 3
Dependent Claim
8 words
A substrate according to claim 1 comprising polyurethane.
Claim 4
Dependent Claim
9 words
A substrate according to claim 1 comprising polyethylene terephthalate.
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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) | 1997-07-25 | 1998-01-24 | 1998-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-25 | 2002-01-24 | 2002-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-25 | 2006-01-24 | 2006-07-26 | $7700.00 | Window Closed / Lapsed |