US4916193A
Expired / Lapsed
US
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Medical devices fabricated totally or in part from copolymers of recurring units derived from cyclic carbonates and lactides
Assignee: United States Surgical Corp
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Filing: 1988-08-01
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Granted: 1990-04-10
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Expires: 2008-08-01
Abstract
Abstract This invention relates to novel copolymers containing carbonate repeat units and ester repeat units.
Inventors
- 👤 Reginald T. Tang
- 👤 Frank Mares
- 👤 William J. Boyle, Jr.
- 👤 Tin-Ho Chiu
- 👤 Kundanbhai M. Patel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/18; A61L15/00; A61L15/16; A61L15/42; A61L15/64; A61L17/00; A61L17/06; A61L17/10; A61L31/00; A61L31/04; A61L31/06
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
86 words
A medical device formed totally or in part of one or more block copolymers having at least one type of recurring monomeric unit of the General Structure I: ##STR7## and having at least one type of recurring monomeric units of the Structure II: ##STR8## wherein: n is from 1 to about 8; and R 1 and R 2 are the same or different and are hydrogen, alkyl or phenyl with the proviso that at least one of R 1 and R 2 is other than hydrogen.
Claim 2
Dependent Claim
86 words
A medical device formed totally or in part of one or more block copolymers having at least one type of recurring monomeric unit of the General Structure I: ##STR7## and having at least one type of recurring monomeric units of the Structure II: ##STR8## wherein: n is from 1 to about 8; and R 1 and R 2 are the same or different and are hydrogen, alkyl or phenyl with the proviso that at least one of R 1 and R 2 is other than hydrogen.
Claim 3
Dependent Claim
14 words
A medical device according to claim 1 wherein n is 1 to about 3.
Claim 4
Dependent Claim
11 words
A medical device according to claim 2 wherein n is 1.
Claim 5
Dependent Claim
23 words
A medical device according to claim 1 wherein R 1 and R 2 are the same or different and are hydrogen or alkyl.
Claim 6
Dependent Claim
31 words
A medical device according to claim 4 wherein R 1 and R 2 are the same or different and are hydrogen or alkyl having from 1 to about 4 carbon atoms.
Claim 7
Dependent Claim
21 words
A medical device according to claim 5 wherein the recurring monomeric units of the Structure II are derived from a lactide.
Claim 8
Dependent Claim
23 words
A medical device according to claim 6 wherein the recurring monomeric units of the Structure II are derived from d-lactide, l-lactide or d,l-lactide.
Claim 9
Dependent Claim
38 words
A medical device according to claim 1 wherein the amount of the recurring monomeric units of the Structure I in said copolymer is at least about 75 wt. % based on the total weight of recurring monomer units.
Claim 10
Dependent Claim
17 words
A medical device according to claim 8 wherein said amount is at least about 85 wt. %.
Claim 11
Dependent Claim
21 words
A medical device according to claim 9 wherein said amount is from about 85 wt. % to about 99 wt. %.
Claim 12
Dependent Claim
21 words
A medical device according to claim 10 wherein said amount is from about 90 wt. % to about 99 wt. %.
Claim 13
Dependent Claim
15 words
A medical device according to claim 1 wherein said device further comprises a biodurable portion.
Claim 14
Dependent Claim
16 words
A medical device according to claim 1 which further comprises one or more other bioresorbable polymers.
Claim 15
Dependent Claim
14 words
A medical device according to claim 1 wherein said copolymer is a random copolymer.
Claim 16
Dependent Claim
120 words
A medical device according to claim 1 wherein said block copolymer has an AB or an ABA structure wherein A is a block of recurring monomeric units of the Structure I or of the Structure II, and B is a block of a recurring monomeric units of the Structure I, the Structure II or a random block or recurring units of the Structure I and II, with the proviso that when A is composed of units of the Structure I, B is composed of units of the Structure II or is a random block, and that when A is composed of units of the Structure II, B is composed of units of the Structure I or is a random block.
Claim 17
Dependent Claim
19 words
A medical device according to claim 15 wherein said block copolymer is a block copolymer of the structure ABA.
Claim 18
Dependent Claim
74 words
A block copolymer having at least one type of recurring monomeric units of the Structure I: ##STR9## and having at least one type of recurring monomeric unit of the Structure II: ##STR10## wherein: n is from 1 to about 8; and R 1 and R 2 are the same or different and are hydrogen, alkyl or phenyl with the proviso that at least one of R 1 and R 2 is other than hydrogen.
Claim 19
Dependent Claim
74 words
A block copolymer having at least one type of recurring monomeric units of the Structure I: ##STR9## and having at least one type of recurring monomeric unit of the Structure II: ##STR10## wherein: n is from 1 to about 8; and R 1 and R 2 are the same or different and are hydrogen, alkyl or phenyl with the proviso that at least one of R 1 and R 2 is other than hydrogen.
Claim 20
Dependent Claim
14 words
A block copolymer according to claim 17 wherein n is 1 to about 3.
Claim 21
Dependent Claim
11 words
A block copolymer according to claim 18 wherein n is 1.
Claim 22
Dependent Claim
23 words
A block copolymer according to claim 17 wherein R 1 and R 2 are the same or different and are hydrogen or alkyl
Claim 23
Dependent Claim
31 words
A block copolymer according to claim 20 wherein R 1 and R 2 are the same or different and are hydrogen or alkyl having from 1 to about 4 carbon atoms.
Claim 24
Dependent Claim
21 words
A block copolymer according to claim 21 wherein the recurring monomeric units of the Structure II are derived from a lactide.
Claim 25
Dependent Claim
23 words
A block copolymer according to claim 22 wherein the recurring monomeric units of the Structure II are derived from d-lactide, l-lactide or d,l-lactide.
Claim 26
Dependent Claim
38 words
A block copolymer according to claim 17 wherein the amount of the recurring monomeric units of the Structure I in said copolymer is at least about 75 wt. % based on the total weight of recurring monomer units.
Claim 27
Dependent Claim
17 words
A block copolymer according to claim 24 wherein said amount is at least about 85 wt. %.
Claim 28
Dependent Claim
21 words
A block copolymer according to claim 25 wherein said amount is from about 85 wt. % to about 99 wt. %.
Claim 29
Dependent Claim
21 words
A block copolymer according to claim 26 wherein said amount is from about 90 wt. % to about 99 wt. %.
Claim 30
Dependent Claim
119 words
A block copolymer according to claim 17 wherein said block copolymer has an AB or an ABA structure wherein A is a block of recurring monomeric units of the Structure I or of the Structure II, and B is a block of a recurring monomeric units of the Structure I, the Structure II or a random block or recurring units of the Structure I and II, with the proviso that when A is composed of units of the Structure I, B is composed of units of the Structure II or is a random block, and that when A is composed of units of the Structure II, B is composed of units of Structure I or is a random block.
Claim 31
Dependent Claim
19 words
A block copolymer according to claim 28 wherein said block copolymer is a block copolymer of the structure ABA.
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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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |