Patent EP0452595B1 successfully refreshed from Google Patents.
EP0452595B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystalline catheter and method therefor
Assignee: Becton Dickinson and Co
•
Filing: 1990-12-28
•
Granted: 1995-08-23
•
Expires: 2010-12-28
Abstract
Abstract A catheter assembly comprises a tubing comprising a body portion (10) and a hollow needle portion (16) associated therewith, said needle portion having a point (14), at lease one of said body portion and needle portion being fabricated of a liquid crystalline polymer which is a polyether, polyphosphazine, polyxylylene, polysulfone, polyamide, polysiloxane or polyester. Methods for producing the assembly are described. <IMAGE>
Inventors
- 👤 James M. Lambert
- 👤 Donald D. Solomon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 21:18
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/04; A61L29/14; A61M; A61M25/00; A61M25/0009; C; C08; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/605; C08L; C08L25/00; C08L25/02; C08L67/00; C08L71/00; C08L77/00; C08L83/00; C08L83/04; C08L85/00; C08L85/02; B; B29; B29C; B29C45/00; B29C2045/0098
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A tubing comprising a body portion (10) and a hollow needle portion (16) associated therewith, said needle portion having a point (14); said body portion needle portions being fabricated of liquid crystalline polymer, characterised in that said needle portion is fabricated of a polyether, polyphosphazine, polyxylylene, polysulfone, polyamide, polysiloxane or polyester crystalline polymer which has been shear-thinned to a viscosity which allows it to flow into and fill a long, thin mould, including a point.
Claim 2
Dependent Claim
56 words
A tubing as claimed in claim 1 wherein said needle portion (16) is a formed of liquid crystalline polyester which is a polymer or copolymer of an aromatic hydroxy acid and the polymeric reaction product of a dicarboxylic acid and a glycol, wherein at least one of the dicarboxylic acid and glycol includes an aromatic group.
Claim 3
Dependent Claim
112 words
A tubing as claimed in claim 1 in which the thermoplastic liquid crystalline polymer has the structure: X ⁅Ar₁ - A - Ar₂ - B - Ar₃⁆ Y (I) or X ⁅Ar₁ - A - Ar₂⁆ Y (II) wherein Ar₁, Ar₂ and Ar₃ are each independently an aromatic or a heterocyclic ring; A and B are each independently an oxygen or sulphur atom or an alkyloxy, alkyldioxy, sulfone, carbonyl, oxycarbonyl, alkylcarbonyl, alkyloxycarbonyl, alkylcarbonyloxy or oxyalkylcarbonyl group (wherein at least one of A and B is an oxycarbonyl group) and the term alkyl refers to alkyl group-containing 1 to 5 carbon atoms); and X and Y are each a hydroxy or carboxyl group.
Claim 4
Dependent Claim
22 words
An assembly as claimed in claim 2 or claim 3 in which the body portion (10)includes a tubing and a hub portion.
Claim 5
Dependent Claim
44 words
An assembly as claimed in any one of claims 2-4 in which the body portion (10) is a plastic tubing affixed to the proximal end of a liquid crystalline polymer needle portion (16), the distal end of said needle portion having said point (14).
Claim 6
Dependent Claim
48 words
An assembly as claimed in any one of claims 2-4 in which the body portion (10) is a tubing of a first liquid crystalline polymer affixed to the proximal end of a liquid crystalline needle portion (16), the distal end of said needle portion having said point (18).
Claim 7
Independent Claim
70 words
A method for preparing a liquid crystalline polymeric tubing having a point comprising: a) heating a thermotropic liquid crystalline polymer to give a melt; b) directing the melt into a tubing mould which includes a point whereby the melt completely fills the mould; c) cooling the melt in the mould whereby the melt solidifies to a tubing having the shape of the mould; and d) removing the tubing the mould.
Claim 8
Dependent Claim
30 words
A method as claimed in claim 7 which includes the step, between steps (a) and (b) forcing the melt under pressure through an orifice whereby the melt decreases in viscosity.
Claim 9
Dependent Claim
33 words
A method for preparing a liquid crystalline polymeric tubing as claimed in claim 7 comprising heating a thermotropic liquid crystalline polymer to give a melt and extruding said melt through a tubing die.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.