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US4549010A
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Bioerodible poly(ortho ester) thermoplastic elastomer from diketene diacetal
Assignee: Merck and Co Inc
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Filing: 1984-06-27
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Granted: 1985-10-22
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Expires: 2004-06-27
Abstract
Abstract The instant invention is directed to a bioerodible poly(ortho ester) thermoplastic elastomer prepared from: (A) a diketene diacetal; (B) a long-chain non-polar, flexible diol containing 4 to 22 carbon atoms; and (C) a diol selected from the group consisting of: (i) diols containing at least one functional group which produces hydrogen bonding or other association, and (ii) rigid symmetrical diols.
Inventors
- 👤 Randall V. Sparer
- 👤 Stefano A. Pogany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:37
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
54 words
A bioerodible poly(ortho ester) thermoplastic elastomer prepared from: (A) a diketene diacetal; (B) a long-chain non-polar, flexible diol containing 4 to 22 carbon atoms and (C) a diol containing at least one functional group which results in hydrogen bonding or other association selected from the group consisting of amide, urethane, urea and imide groups.
Claim 2
Dependent Claim
54 words
A bioerodible poly(ortho ester) thermoplastic elastomer prepared from: (A) a diketene diacetal; (B) a long-chain non-polar, flexible diol containing 4 to 22 carbon atoms and (C) a diol containing at least one functional group which results in hydrogen bonding or other association selected from the group consisting of amide, urethane, urea and imide groups.
Claim 3
Dependent Claim
14 words
The elastomer of claim 1 wherein said long-chain, non-polar, flexible diol is 1,10-decane diol.
Claim 4
Dependent Claim
22 words
The elastomer of claim 1 wherein said amide containing diol is an amide selected from the group consisting of N-(3-hydroxypropyl)-γ-hydroxybutyramide and N,N'-bis(2-hydroxyethyl)-terephthalamide.
Claim 5
Dependent Claim
100 words
A bioerodible poly(ortho ester thermoplastic elastomer prepared from: (A) 60 to 95%, by weight, based on the total weight of the polymer produced, of a flexible segment prepared from a diketene diacetal and a long chain, non-polar, flexible diol containing 4 to 22 carbon atoms; and (B) 5 to 40%, by weight, based on the total weight of the polymer produced, of a rigid segment prepared from a diketene diacetal and a rigid diol containing at least one functional group which results in hydrogen bonding or other association selected from the group consisting of amide, urethane, urea and imide groups.
Claim 6
Dependent Claim
100 words
A bioerodible poly(ortho ester thermoplastic elastomer prepared from: (A) 60 to 95%, by weight, based on the total weight of the polymer produced, of a flexible segment prepared from a diketene diacetal and a long chain, non-polar, flexible diol containing 4 to 22 carbon atoms; and (B) 5 to 40%, by weight, based on the total weight of the polymer produced, of a rigid segment prepared from a diketene diacetal and a rigid diol containing at least one functional group which results in hydrogen bonding or other association selected from the group consisting of amide, urethane, urea and imide groups.
References Cited (Backward Citations)
US4304767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |