US5078700A
Expired / Lapsed
US
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Liquid crystalline catheter
Assignee: Becton Dickinson and Co
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Filing: 1990-03-19
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Granted: 1992-01-07
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Expires: 2010-03-19
Abstract
Abstract A catheter assembly includes a tubing portion and a needle portion, at least one of which is a thermoplastic liquid crystalline polymer. The tubing and needle may be integral or unitary. The invention includes a method to make the assembly in which a melt of the liquid crystalline polymer is shear thinned by passing through an orifice such as an extrusion die to make tubing. The shear thinned melt may be directed into a mold having a point to make a liquid crystalline needle.
Inventors
- 👤 James M. Lambert
- 👤 Donald D. Solomon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:39
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: 18
Claim 1
Independent Claim
135 words
A catheter assembly comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of a thermoplastic liquid crystalline polymer having a shear thinned viscosity of 500 poise or less, said polymer being selected from the group having the structures I and II XAr.sub.1 --A--Ar.sub.2 --BAr.sub.3 Y I XAr.sub.1 --A--Ar.sub.2 Y II wherein Ar 1 , Ar 2 and Ar 3 are independently selected from the group consisting of an aromatic ring and a hetercyclic ring. A and B are independently selected from the group consisting of alkyloxycarbonyl, alkylcarbonyloxy and oxyalkylcarbonyl wherein at least one of A and B is an oxycarbonyl group, the term alkyl being 1 to 5 carbon atoms, and X and Y are selected from the group consisting of hydroxy and carboxyl.
Claim 2
Dependent Claim
135 words
A catheter assembly comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of a thermoplastic liquid crystalline polymer having a shear thinned viscosity of 500 poise or less, said polymer being selected from the group having the structures I and II XAr.sub.1 --A--Ar.sub.2 --BAr.sub.3 Y I XAr.sub.1 --A--Ar.sub.2 Y II wherein Ar 1 , Ar 2 and Ar 3 are independently selected from the group consisting of an aromatic ring and a hetercyclic ring. A and B are independently selected from the group consisting of alkyloxycarbonyl, alkylcarbonyloxy and oxyalkylcarbonyl wherein at least one of A and B is an oxycarbonyl group, the term alkyl being 1 to 5 carbon atoms, and X and Y are selected from the group consisting of hydroxy and carboxyl.
Claim 3
Dependent Claim
16 words
The assembly of claim 1 wherein said body portion includes a tubing and a hub portion.
Claim 4
Dependent Claim
13 words
The assembly of claim 2 wherein said tubing and hub portion are integral.
Claim 5
Dependent Claim
10 words
The assembly of claim 1 wherein said point is beveled.
Claim 6
Dependent Claim
20 words
The assembly of claim 1 wherein said aromatic ring is selected from the group consisting of phenyl, naphthyl and biphenyl.
Claim 7
Dependent Claim
30 words
The assembly of claim 5 wherein said aromatic ring has a substituent selected from the group consisting of an alkyl group of 1 to 3 carbon atoms and a halogen.
Claim 8
Dependent Claim
19 words
The assembly of claim 1 wherein said heterocyclic ring is selected from the group consisting of pyridine and quinoline.
Claim 9
Dependent Claim
14 words
The assembly of claim 1 wherein said body portion and needle portion are integral.
Claim 10
Dependent Claim
32 words
The assembly of claim 1 wherein said body portion is a plastic tubing affixed to the proximal end of said needle portion, the distal end of said needle portion having said point.
Claim 11
Dependent Claim
37 words
The assembly of claim 9 wherein said body portion is a tubing of a first liquid crystalline polymer affixed to the proximal end of said needle portion, the distal end of said needle portion having said point.
Claim 12
Dependent Claim
63 words
A tubing of a thermoplastic liquid crystalline polymer having a shear thinned viscosity of 500 poise or less, said polymer being selected from the group consisting of a polyether, polyphosphazine, polyoxylylene, polysulfone, polyamide, polysiloxane and polyester, said tubing comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of said liquid crystalline polymer.
Claim 13
Dependent Claim
63 words
A tubing of a thermoplastic liquid crystalline polymer having a shear thinned viscosity of 500 poise or less, said polymer being selected from the group consisting of a polyether, polyphosphazine, polyoxylylene, polysulfone, polyamide, polysiloxane and polyester, said tubing comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of said liquid crystalline polymer.
Claim 14
Dependent Claim
81 words
A catheter assembly comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of a liquid crystalline polyester having a shear thinned viscosity of 500 poise or less, said polyester being selected from the group consisting of polymers and copolymers of an aromatic hydroxy acid and the polymeric reaction product of a dicarboxylic acid and a glycol wherein at least one of said dicarboxylic acid and glycol includes an aromatic group.
Claim 15
Dependent Claim
81 words
A catheter assembly comprising a body portion and a hollow needle portion associated therewith, said needle portion having a point and being fabricated of a liquid crystalline polyester having a shear thinned viscosity of 500 poise or less, said polyester being selected from the group consisting of polymers and copolymers of an aromatic hydroxy acid and the polymeric reaction product of a dicarboxylic acid and a glycol wherein at least one of said dicarboxylic acid and glycol includes an aromatic group.
Claim 16
Dependent Claim
24 words
The polyester of claim 12 wherein said hydroxy acid is selected from the group consisting of hydroxybenzoic acid, hydroxynaphthoic acid and hydroxybiphenyl carboxylic acid.
Claim 17
Dependent Claim
36 words
The polyester of claim 12 wherein said dicarboxylic acid is selected from the group consisting of isophthalic acid, terephthalic acid, naphthylene dicarboxylic acid, biphenyl dicarboxylic acid, and aliphatic dicarboxylic acids having 2 to 10 carbon atoms.
Claim 18
Dependent Claim
28 words
The polyester of claim 12 wherein said glycol is selected from the group consisting of dihydroxybenzene, dihydroxynaphthylene, dihydroxybiphenyl and an aliphatic glycol having 2 to 10 carbon atoms.
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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) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |