US5994478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy-terminated polyhydroxyalkanoates
Assignee: CJ CheilJedang Corp
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Filing: 1998-04-20
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Granted: 1999-11-30
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Expires: 2018-04-20
Abstract
Abstract Hydroxyterminated PHA is produced by cultivating a PHA-producing microorganism in the presence of an aliphatic diol or an aliphatic polyol. High molecular weight hydroxy-terminated PHA is obtainable by the disclosed process, and is useful in the production of graft, block and random polymers and copolymers with other monomers, oligomers and polymers containing appropriate functionality and end group compatibility.
Inventors
- 👤 Jawed Asrar
- 👤 Devang T. Shah
- 👤 Minhtien Tran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:32
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/62; C12P7/625; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4286; C08G63/00; C08G63/02; C08G63/06; C08G63/91; C08G63/912; C08G81/00; C08L; C08L71/00; C08L71/02; C08G2230/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
39 words
A random or random block polymer or copolymer composition comprising the reaction product of hydroxy-terminated PHA and a different polyester, copolyester, polyamide or organic dicarboxylic, acid wherein the molecular weight of the hydroxy-terminated PHA is greater than about 3000.
Claim 2
Dependent Claim
39 words
A random or random block polymer or copolymer composition comprising the reaction product of hydroxy-terminated PHA and a different polyester, copolyester, polyamide or organic dicarboxylic, acid wherein the molecular weight of the hydroxy-terminated PHA is greater than about 3000.
Claim 3
Dependent Claim
33 words
The polymer or copolymer composition of claim 1, wherein said polyester or copolyester is a polyethylene terephthalate, polybutylene terephthalate, polycaprolactone, polyhydroxyalkanoate, polylactide, polyglycolide, polyethylene succinate, polybutylene succinate, polyethylene adipate, or polyethylene succinate adipate.
Claim 4
Dependent Claim
36 words
The polymer or copolymer composition of claim 1, wherein said dicarboxylic acid is oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, azelaic acid, terephthalic acid, phthalic acid, maleic acid, fumaric acid or their anhydrides.
Claim 5
Dependent Claim
19 words
The polymer or copolymer composition of claim 1, wherein said polyamide is nylon 6, nylon 66, or nylon 12.
Claim 6
Dependent Claim
18 words
The polymer or copolymer composition of claim 1, wherein said composition is a polyester, copolyester or polyester amide.
References Cited (Backward Citations)
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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) | 2002-11-29 | 2003-05-31 | 2003-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-29 | 2007-05-31 | 2007-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-29 | 2011-05-31 | 2011-11-30 | $7700.00 | Window Closed / Lapsed |