US6241757B1 — Stent for expanding body's lumen

Claim 1

Independent Claim 131 words

A stent for expanding a lumen of a body, the stent being made up of a single length of a filament and including a plurality of bands formed in a zigzag pattern, wherein: each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis of the stent; each peak portion that is adjacent to another band being twisted with a respective valley portion of the other band; and an initial portion of each band other than an initial band being an extension from a last straight portion of a previous adjacent band.

Claim 2

Dependent Claim 131 words

A stent for expanding a lumen of a body, the stent being made up of a single length of a filament and including a plurality of bands formed in a zigzag pattern, wherein: each of the bands includes a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, and each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis of the stent; each peak portion that is adjacent to another band being twisted with a respective valley portion of the other band; and an initial portion of each band other than an initial band being an extension from a last straight portion of a previous adjacent band.

Claim 3

Dependent Claim 41 words

The stent as claimed in claim 1 , wherein upper and lower end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.

Claim 4

Dependent Claim 29 words

The stent as claimed in claim 1 , wherein the upper and lower end portions of the stent have a larger diameter than a middle portion of the stent.

Claim 5

Dependent Claim 17 words

The stent as claimed in claim 1 , wherein the filament is made of a Ni—Ti alloy.

Claim 6

Dependent Claim 19 words

The stent as claimed in claim 1 , wherein the stent is covered or wrapped with a flexible material.

Claim 7

Dependent Claim 26 words

The stent as claimed in claim 1 , further comprising on one end thereof a retrieving member by which the stent is removed from the lumen.

Claim 8

Dependent Claim 25 words

The stent as claimed in claim 6 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.

Claim 9

Dependent Claim 26 words

The stent as claimed in claim 1 wherein said each peak portion is twisted at least once around the respective valley portion of the other band.

Claim 10

Dependent Claim 24 words

The stent as claimed in claim 1 wherein said each peak portion is twisted with a single respective valley portion of the other band.

Claim 11

Dependent Claim 129 words

A stent for expanding a lumen of a body, the stent being made of a single length of a filament, the stent comprising: a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the segments being not engaged with each other; and upper and lower end portions having a plurality of bent points; wherein the number of the bent points of the upper end portion is equal with the number of the bent points of the lower end portion, and any one segment passes alternately on and under other segments which are wound along a longitudinal axis of the stent in a spiral direction so that cross points of the segments form a plurality of meshes.

Claim 12

Dependent Claim 129 words

A stent for expanding a lumen of a body, the stent being made of a single length of a filament, the stent comprising: a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of segments with the segments being not engaged with each other; and upper and lower end portions having a plurality of bent points; wherein the number of the bent points of the upper end portion is equal with the number of the bent points of the lower end portion, and any one segment passes alternately on and under other segments which are wound along a longitudinal axis of the stent in a spiral direction so that cross points of the segments form a plurality of meshes.

Claim 13

Dependent Claim 42 words

The stent as claimed in claim 10 , wherein the upper and lower end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.

Claim 14

Dependent Claim 29 words

The stent as claimed in claim 10 , wherein the upper and lower end portions of the stent have a larger diameter than a middle portion of the stent.

Claim 15

Dependent Claim 17 words

The stent as claimed in claim 10 , wherein the filament is made of a Ni—Ti alloy.

Claim 16

Dependent Claim 19 words

The stent as claimed in claim 10 , wherein the stent is covered or wrapped with a flexible material.

Claim 17

Dependent Claim 25 words

The stent as claimed in claim 10 , further comprising on one end a retrieving member by which the stent is removed from the lumen.

Claim 18

Dependent Claim 25 words

The stent as claimed in claim 15 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.

Claim 19

Dependent Claim 97 words

A stent for expanding a lumen of a body, the stent being made from a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including alternate peaks and valleys, each peak of one band being twisted together with a single respective valley of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.

Claim 20

Dependent Claim 97 words

A stent for expanding a lumen of a body, the stent being made from a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including alternate peaks and valleys, each peak of one band being twisted together with a single respective valley of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.

Claim 21

Dependent Claim 138 words

A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof, and each valley portion of the bands being twisted with a peak portion of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.

Claim 22

Dependent Claim 138 words

A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent, each of the zigzag sections including a plurality of bands, each of the bands including a series of straight portions, peak portions, and valley portions, the peak and valley portions being integrally engaged with the straight portions, each of the bands being disposed along a circumferential direction of the stent on a plane substantially perpendicular to a longitudinal axis thereof, and each valley portion of the bands being twisted with a peak portion of an adjacent band; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections.

Claim 23

Dependent Claim 100 words

A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections, the spiral section including, a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of unengaged segments, and upper and lower end portions having a plurality of bent points.

Claim 24

Dependent Claim 100 words

A stent for expanding a lumen of a body, the stent being made of a single length of filament, the stent comprising: zigzag sections, in which the filament is wound in a zigzag manner, disposed on both end portions of the stent; and a spiral section, in which the filament is wound in a spiral manner, disposed between the zigzag sections, the spiral section including, a body portion formed in such a way that the filament crosses in a spiral pattern to form a plurality of unengaged segments, and upper and lower end portions having a plurality of bent points.

Claim 25

Dependent Claim 46 words

A stent for expanding a lumen of a body, comprising: bands constructed from a single length of a filament; each of the bands including alternate peaks and valleys; and each peak of one band being twisted together with a single respective valley of an adjacent band.

Claim 26

Dependent Claim 46 words

A stent for expanding a lumen of a body, comprising: bands constructed from a single length of a filament; each of the bands including alternate peaks and valleys; and each peak of one band being twisted together with a single respective valley of an adjacent band.

Claim 27

Dependent Claim 10 words

The stent of claim 20 wherein the bands are cylindrical.

Claim 28

Dependent Claim 26 words

The stent of claim 20 wherein each of the bands includes straight portions of the filament respectively disposed between each peak and each respective adjacent valley.

Claim 29

Dependent Claim 18 words

The stent of claim 20 wherein each of the valleys comprises a respective straight portion of the filament.

Claim 30

Dependent Claim 25 words

The stent of claim 20 wherein each peak of one band is twisted at least once around the single respective valley of the adjacent band.

Claim 31

Dependent Claim 80 words

The stent of claim 20 , further comprising: a mid portion having first and second opposite sides; a first end portion connected to the first side of the mid portion; a second end portion connected to the second side of the mid portion; wherein the bands are cylindrical and have respective diameters; and wherein bands that compose the first and second end portions have respective diameters that are larger than the diameter of a band that composes the mid portion.

Claim 32

Dependent Claim 22 words

The stent as claimed in claim 17 , further comprising a zigzag section formed in a middle portion of the spiral section.

Claim 33

Dependent Claim 39 words

The stent as claimed in claim 17 , wherein the end portions of the stent have a flare shape in which a diameter is increased toward a distal end thereof to prevent the stent from migrating inside the lumen.

Claim 34

Dependent Claim 26 words

The stent as claimed in claim 17 , wherein the end portions of the stent have a larger diameter than a middle portion of the stent.

Claim 35

Dependent Claim 17 words

The stent as claimed in claim 17 , wherein the filament is made of a Ni—Ti alloy.

Claim 36

Dependent Claim 19 words

The stent as claimed in claim 17 , wherein the stent is covered or wrapped with a flexible material.

Claim 37

Dependent Claim 25 words

The stent as claimed in claim 17 , further comprising on one end a retrieving member by which the stent is removed from the lumen.

Claim 38

Dependent Claim 25 words

The stent as claimed in claim 24 , wherein the retrieving member comprises a plurality of wires attached to the one end of the stent.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2004-06-04	2004-12-04	2005-06-05	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2008-06-04	2008-12-04	2009-06-05	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2012-06-04	2012-12-04	2013-06-05	$7700.00	Window Closed / Lapsed

Stent for expanding body's lumen

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