Patent US5403347A successfully refreshed from Google Patents.
US5403347A
Expired / Lapsed
US
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Absorbable block copolymers and surgical articles fabricated therefrom
Assignee: United States Surgical Corp
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Filing: 1994-03-02
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Granted: 1995-04-04
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Expires: 2014-03-02
Abstract
Abstract Block copolymers wherein one of the blocks is made from hard phase forming monomers and another of the blocks is made from soft phase forming monomers copolymerized with randomly intermingled units of other soft phase forming monomers. The copolymers are useful in forming surgical articles, including both monofilament and multifilament sutures. The block copolymer preferably comprising: a) a proportion of glycolic acid ester units as end blocks, and b) a center block comprising 1,4 dioxan-2-one randomly polymerized with 1,3 dioxane-2-one.
Inventors
- 👤 Mark S. Roby
- 👤 Steven L. Bennett
- 👤 Cheng-Kung Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:29
CPC Classifications
A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/12; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06166; C; C08; C08G; C08G63/00; C08G63/66; C08G63/664; A61B2017/00004
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
31 words
A block copolymer comprising: a) a proportion of glycolic acid ester units as one of said blocks, and b) another of said blocks comprising 1,4 dioxan-2-one randomly polymerized with 1,3 dioxane-2-one.
Claim 2
Dependent Claim
31 words
A block copolymer comprising: a) a proportion of glycolic acid ester units as one of said blocks, and b) another of said blocks comprising 1,4 dioxan-2-one randomly polymerized with 1,3 dioxane-2-one.
Claim 3
Dependent Claim
25 words
The block copolymer of claim 1, wherein glycolic acid ester units comprise from about 50 to about 80 percent by weight of said block copolymer.
Claim 4
Dependent Claim
32 words
The block copolymer of claim 1, wherein said blocks comprising random copolymers of 1,4 dioxan-2-one and 1,3 dioxane-2-one comprise from about 20 to about 50 percent by weight of said block copolymer.
Claim 5
Dependent Claim
41 words
The block copolymer of claim 3, wherein said blocks comprising random copolymers of 1,4 dioxan-2-one and 1,3 dioxane-2-one are formed from the random polymerization of about 35 percent by weight of 1,4 dioxan-2-one and about 65 percent by weight 1,3 dioxane-2-one.
Claim 6
Dependent Claim
23 words
The block copolymer of claim 1, wherein component (a) comprises a predominant amount of glycolic acid ester units, the remainder being 1,4 dioxane-2-one.
Claim 7
Dependent Claim
19 words
The block copolymer of claim 5 wherein component (b) consists essentially of 1,4 dioxane-2-one randomly polymerized with 1,3 dioxane-2-one.
Claim 8
Dependent Claim
14 words
The block copolymer of claim 1, wherein said block copolymer is a tri-block copolymer.
Claim 9
Dependent Claim
31 words
The tri-block copolymer of claim 7, comprising: a) a proportion of glycolic acid ester units as end blocks, and b) a center block comprising 1,4 dioxan-2-one randomly polymerized with 1,3 dioxane-2-one.
Claim 10
Dependent Claim
24 words
The tri-block copolymer of claim 8, wherein said end blocks comprise from about 50 to about 80 percent by weight of said tri-block copolymer.
Claim 11
Dependent Claim
24 words
The tri-block copolymer of claim 8, wherein said end blocks comprise a predominant amount of glycolic acid ester units, the remainder being 1,4 dioxane-2-one.
Claim 12
Dependent Claim
20 words
The tri-block copolymer of claim 10, wherein said center block consists essentially of 1,4 dioxane-2-one randomly polymerized with 1,3 dioxane-2-one.
Claim 13
Dependent Claim
36 words
The tri-block copolymer of claim 9, wherein said center block is formed from the random polymerization of about 35 percent of 1,4 dioxane-2-one and about 65 percent of 1,3 dioxane-2-one, by weight of said center block.
Claim 14
Dependent Claim
15 words
A surgical article formed totally or in part from the block copolymer of claim 1.
Claim 15
Dependent Claim
29 words
The surgical article of claim 13, wherein said surgical article is selected from the group consisting of clips, staples, sutures, pins, screws, prosthetic devices, anastomosis rings and growth matrices.
Claim 16
Dependent Claim
13 words
The surgical article of claim 14, wherein said suture is a monofilament suture.
Claim 17
Independent Claim
46 words
A method of making a copolymer comprising the steps of: a) adding 1,4 dioxane-2-one and 1,3 dioxane-2-one; b) polymerizing component (a) to the point where all the 1,3 dioxane-2-one is incorporated in a polymer but residual 1,4 dioxane-2-one monomer remains; c) adding glycolide; and d) polymerizing.
Claim 18
Independent Claim
46 words
A method of making a copolymer comprising the steps of: a) adding 1,4 dioxane-2-one and 1,3 dioxane-2-one; b) polymerizing component (a) to the point where all the 1,3 dioxane-2-one is incorporated in a polymer but residual 1,4 dioxane-2-one monomer remains; c) adding glycolide; and d) polymerizing.
Claim 19
Dependent Claim
13 words
The method of claim 16, further comprising the step of removing residual monomer.
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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) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |