US5126255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer production
Assignee: Syngenta Ltd
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Filing: 1990-05-01
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Granted: 1992-06-30
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Expires: 2010-05-01
Abstract
Abstract A process for the synthesis of copolymers comprising 3-hydroxybutyrate (HB) and 3-hydroxyvalerate (HV) units by the cultivation of certain strains of Corynebacterium, and Rhodococcus, some of which are novel on a substrate containing e.g. glucose. The process can also be used to produce the previously unknown homopolymer of HV by using a substrate of valeric acid.
Inventors
- 👤 Alistair J. Anderson
- 👤 Edwin A. Dawes
- 👤 Geoffrey W. Haywood
- 👤 David Byrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/62; C12P7/625; C08; C08G; C08G63/00; C08G63/02; C08G63/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/829; Y10S435/843; Y10S435/872
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
84 words
A process for the synthesis of copolymers comprising 3-hydroxybutyrate(HB) monomer units and 3-hydroxyvalerate(HV) comonomer units, said process comprising aerobically cultivating a bacterium selected from the group consisting of Corynebacterium dioxydans ATCC 21766, Corynebacterium hydrocarboxydans ATCC 21767, Norcardia lucida NCIB 10980, Rhodococcus sp. ATCC 19070, Rhodococcus sp. NCIMB 40126 under growth limitation conditions in an aqueous medium comprising a substrate, said substrate comprising an HV component, wherein the HV component is an assimilable carbon compound that is metabolisable by Alcaligenes eutrophus NCIB 11599 to PHB.
Claim 2
Dependent Claim
84 words
A process for the synthesis of copolymers comprising 3-hydroxybutyrate(HB) monomer units and 3-hydroxyvalerate(HV) comonomer units, said process comprising aerobically cultivating a bacterium selected from the group consisting of Corynebacterium dioxydans ATCC 21766, Corynebacterium hydrocarboxydans ATCC 21767, Norcardia lucida NCIB 10980, Rhodococcus sp. ATCC 19070, Rhodococcus sp. NCIMB 40126 under growth limitation conditions in an aqueous medium comprising a substrate, said substrate comprising an HV component, wherein the HV component is an assimilable carbon compound that is metabolisable by Alcaligenes eutrophus NCIB 11599 to PHB.
Claim 3
Dependent Claim
37 words
A process as claimed in claim 1 wherein the bacterium is selected from the group consisting of Corynebacterium dioxydans ATCC 21766, Corynebacterium hydrocarboxydans ATCC 21767, Norcardia lucida NCIB 10980, Rhodococcus sp. ATCC 19070, Rhodococcus sp. NCIMB 40126.
Claim 4
Dependent Claim
15 words
A process as claimed in claim 1 wherein the bacterium is Rhodococcus sp. NCIMB 40126.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 wherein the number of HV comonomer units in the copolymer is at least 5 mol %.
Claim 6
Dependent Claim
32 words
A process as claimed in claim 1 wherein the HV component is selected from the group consisting of glucose, fructose, acetic acid, lactic acid, butyric acid, succinic acid, molasses, and derivatives thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-06-30 | 1995-12-30 | 1996-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-30 | 1999-12-30 | 2000-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-30 | 2003-12-30 | 2004-06-30 | $7700.00 | Window Closed / Lapsed |