US5891108A — Drug delivery stent

Claim 1

Independent Claim 105 words

A drug delivery stent assembly including a hollow tubular metal wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being constructed in a manner which permits said stent to be placed in one of two states, one state being where said stent assumes the shape of an enlarged generally cylindrical envelope and the other state being where said stent assumes the share of a contracted smaller cylindrical envelope.

Claim 2

Dependent Claim 105 words

A drug delivery stent assembly including a hollow tubular metal wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being constructed in a manner which permits said stent to be placed in one of two states, one state being where said stent assumes the shape of an enlarged generally cylindrical envelope and the other state being where said stent assumes the share of a contracted smaller cylindrical envelope.

Claim 3

Dependent Claim 17 words

The drug delivery stent of claim 1 wherein said stent is made of a nickel titanium alloy.

Claim 4

Dependent Claim 46 words

The stent of claim 1 wherein said holes are formed with a laser and are small enough to prevent rapid leakage, but large enough to allow slow leakage of a liquid solution from said stent over a period of several hours to a week or more.

Claim 5

Dependent Claim 22 words

The stent of claim 1 wherein said hollow tubular wire stent extends in an undulating helical path to form the cylindrical envelope.

Claim 6

Dependent Claim 59 words

The stent of claim 1 wherein said hollow tubular wire stent extends back and forth in an undulating manner and in a cylindrical fashion and axially forwardly to the distal end of the stent to form a continuous stent defining a cylindrical envelope (FIG. 3 or FIG. 5) thereby forming generally cylindrical undulating loops (FIG. 3 or FIG. 5).

Claim 7

Dependent Claim 31 words

The stent of claim 1 wherein said hollow tubular wire stent extends in a helical or coiled spring path to form a coiled spring type stent defining therein the cylindrical envelope.

Claim 8

Dependent Claim 10 words

The stent of claim 1 being made of stainless steel.

Claim 9

Dependent Claim 9 words

The stent of claim 1 being made of tantalum.

Claim 10

Dependent Claim 30 words

The stent of claim 1 having at least two holes in the sidewalls of the stent facing inwardly of the cylindrical envelope near at least one end of the stent.

Claim 11

Dependent Claim 25 words

The stent of claim 1 wherein said hollow tubular wire has an outer diameter of 0.008 inches±0.002 inches and an inner diameter of 0.005 inches±0.002.

Claim 12

Dependent Claim 99 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of a material which can be caused to assume two states, one state being where said stent assumes the shape of an enlarged cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 13

Dependent Claim 99 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of a material which can be caused to assume two states, one state being where said stent assumes the shape of an enlarged cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 14

Dependent Claim 62 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of a nickel titanium alloy.

Claim 15

Dependent Claim 62 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of a nickel titanium alloy.

Claim 16

Dependent Claim 60 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of stainless steel.

Claim 17

Dependent Claim 60 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of stainless steel.

Claim 18

Dependent Claim 59 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of tantalum.

Claim 19

Dependent Claim 59 words

A drug delivery stent assembly including a hollow tubular wire stent which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed and said stent being made of tantalum.

Claim 20

Dependent Claim 123 words

A drug delivery stent assembly including a hollow tubular metal wire stent which extends in a path defining a generally cylindrical envelope, which has a proximal end and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being constructed in a manner which permits said stent to be placed in one of two states, one state being where said stent assumes the shape of an enlarged generally cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 21

Dependent Claim 123 words

A drug delivery stent assembly including a hollow tubular metal wire stent which extends in a path defining a generally cylindrical envelope, which has a proximal end and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being constructed in a manner which permits said stent to be placed in one of two states, one state being where said stent assumes the shape of an enlarged generally cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 22

Dependent Claim 18 words

The drug delivery stent assembly of claim 15 wherein said coupling means is made of a dissolvable material.

Claim 23

Dependent Claim 118 words

A drug delivery stent assembly including a hollow tubular metal wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of a material which can be caused to assume two states, one state being where said stent assumes the shape of an enlarged cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 24

Dependent Claim 118 words

A drug delivery stent assembly including a hollow tubular metal wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of a material which can be caused to assume two states, one state being where said stent assumes the shape of an enlarged cylindrical envelope and the other state being where said stent assumes the shape of a contracted smaller cylindrical envelope.

Claim 25

Dependent Claim 18 words

The drug delivery stent assembly of claim 17 wherein said coupling means is made of a dissolvable material.

Claim 26

Dependent Claim 80 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of a nickel titanium alloy.

Claim 27

Dependent Claim 80 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of a nickel titanium alloy.

Claim 28

Dependent Claim 18 words

The drug delivery stent assembly of claim 19 wherein said coupling means is made of a dissolvable material.

Claim 29

Dependent Claim 78 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of stainless steel.

Claim 30

Dependent Claim 78 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of stainless steel.

Claim 31

Dependent Claim 18 words

The drug delivery stent assembly of claim 21 wherein said coupling means is made of a dissolvable material.

Claim 32

Dependent Claim 77 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of tantalum.

Claim 33

Dependent Claim 77 words

A drug delivery stent assembly including a hollow tubular wire stent which has a proximal end, which extends in a path defining a generally cylindrical envelope and which has side walls facing outwardly of the cylindrical envelope with holes therein for delivery of liquid to a site of placement in a vessel where the stent is placed, means for coupling and uncoupling said proximal end to a liquid delivery tubing and said stent being made of tantalum.

Claim 34

Dependent Claim 18 words

The drug delivery stent assembly of claim 21 wherein said coupling means is made of a dissolvable material.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-04-05	2002-10-05	2003-04-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-04-05	2006-10-05	2007-04-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-04-05	2010-10-05	2011-04-06	$7700.00	Window Closed / Lapsed

Drug delivery stent

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