Patent US3909362A successfully refreshed from Google Patents.
US4935480A
Expired / Lapsed
US
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Fluorinated polyetherurethanes and medical devices therefrom
Assignee: UNITED AERONAUTICAL CORP
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Filing: 1989-03-20
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Granted: 1990-06-19
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Expires: 2009-03-20
Abstract
Abstract Non-blocking, hemocompatible, thermoplastic, fluorinated polyetherurethanes and a method for their preparation from fluorinated polyether glycols, isocyanates, chain extenders and a non-fluorinated polyol. The method includes two steps in which the fluorinated glycol is reacted initially with the diisocyanate to give a prepolymer having terminal isocyanate groups, and the prepolymer is then reacted with the extender and non-fluorinated polyol. Medical devices are fabricated from the fluorinated polyetherurethane.
Inventors
- 👤 Richard J. Zdrahala
- 👤 Marc A. Strand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; A; A61; A61L; A61L33/00; A61L33/06; A61L33/068; C08G18/08; C08G18/10; Y; Y10; Y10S; Y10S623/00; Y10S623/924
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A medical device having a hemocompatible surface comprising a shaped article of thermoplastic polyetherurethane, said polyetherurethane consisting essentially of a product from the reaction of a diisocyanate, a fluorinated polyol a nonfluorinated polyol selected from the group consisting of a polyalkyleneoxide polyol and a polyester polyol and a chain extender of 2-12 carbon atoms selected from the group consisting of a diol, diamone and amino alcohol.
Claim 2
Dependent Claim
66 words
A medical device having a hemocompatible surface comprising a shaped article of thermoplastic polyetherurethane, said polyetherurethane consisting essentially of a product from the reaction of a diisocyanate, a fluorinated polyol a nonfluorinated polyol selected from the group consisting of a polyalkyleneoxide polyol and a polyester polyol and a chain extender of 2-12 carbon atoms selected from the group consisting of a diol, diamone and amino alcohol.
Claim 3
Dependent Claim
51 words
The device of claim 1 wherein said fluorinated polyol is selected from the group having the formula: ##STR2## wherein R is a perfluorinated alkyl group having about 1 to 12 carbon atoms, x is about 1 to 4, Y is about 0 to 20 and Z is about 2 to 5.
Claim 4
Dependent Claim
24 words
The device of claim 1 wherein said polyalkyleneoxide polyol is selected from the group consisting of a polytetramethylenether glycol polypropylene glycol and polyethylene glycol.
Claim 5
Dependent Claim
44 words
A medical device having a hemocompatible surface comprising a shaped article of a thermoplastic polyetherurethane, said polyurethane consisting essentially of a product from the reaction of 4,4'-diphenylmethane-diisocyanate, a fluorinated polyether polyol, polytetramethylenether glycol and a chain extending diol of 2 to 6 carbon atoms.
Claim 6
Dependent Claim
44 words
A medical device having a hemocompatible surface comprising a shaped article of a thermoplastic polyetherurethane, said polyurethane consisting essentially of a product from the reaction of 4,4'-diphenylmethane-diisocyanate, a fluorinated polyether polyol, polytetramethylenether glycol and a chain extending diol of 2 to 6 carbon atoms.
Claim 7
Dependent Claim
9 words
The medical device of claim 1 which is catheter.
Claim 8
Dependent Claim
10 words
The medical device of claim 1 which is a graft.
Claim 9
Dependent Claim
11 words
The medical device of claim 1 which is a vascular prosthesis.
References Cited (Backward Citations)
US4098742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |