US5226899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter tubing of controlled in vivo softening
Assignee: Becton Dickinson and Co
•
Filing: 1991-08-15
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Granted: 1993-07-13
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Expires: 2011-08-15
Abstract
Abstract A catheter tubing has a layer of a hydrophobic stiffening polymer encapsulated by a layer of hydrophilic thermoplastic base polymer. Preferred stiffening polymers are polyesterpolyether block copolymers. Preferred base polymers are thermoplastic polyetherurethanes. The encapsulated layer may be a stripe or an annular layer having base polymer layers laminated on both surfaces thereof.
Inventors
- 👤 Min-Shiu Lee
- 👤 Mutlu Karakelle
- 👤 David E. Spielvogel
- 👤 Robert A. Taller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:02
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0054; A61L; A61L29/00; A61L29/08; A61L29/085; A61L29/14; B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; A61M2025/0063; A61M2025/0064; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A catheter tubing comprising a stripe of a thermoplastic hydrophobic polyester-polyether block copolymer having a Shore D hardness of about 50 to 80 encapsulated in a hydrophilic thermoplastic polyetherurethane, said polyetherurethane consisting essentially of the reaction product of 4,4'-diphenylmethane diisocyanate, polytetramethylene ether glycol and 1,4-butanediol.
Claim 2
Dependent Claim
45 words
A catheter tubing comprising a stripe of a thermoplastic hydrophobic polyester-polyether block copolymer having a Shore D hardness of about 50 to 80 encapsulated in a hydrophilic thermoplastic polyetherurethane, said polyetherurethane consisting essentially of the reaction product of 4,4'-diphenylmethane diisocyanate, polytetramethylene ether glycol and 1,4-butanediol.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |