US4567140A
Expired / Lapsed
US
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Microbial polysaccharides, process for their preparation, microorganisms suitable for this and use of the polysaccharides
Assignee: Hoechst AG
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Filing: 1983-04-21
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Granted: 1986-01-28
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Expires: 2003-04-21
Abstract
Abstract Polysaccharides are obtained by fermentation using a mixed culture of several microorganisms, of which at least one also produces a polysaccharide in pure culture, which polysaccharides are suitable as viscosity regulators. A mixed culture of the strains Pseudomonas maltophilia DSM 2130 and Agrobacterium tumefaciens DSM 2128 is particularly suitable.
Inventors
- 👤 Hartmut Voelskow
- 👤 Merten Schlingmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12N; C12N1/00; C12N1/20; C12N1/205; C12P39/00; C12R; C12R2001/00; C12R2001/01; C12R2001/38; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/874
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
88 words
Extracellular polysaccharides containing glucose and galactose in a molar ratio of about 4:1 to about 8:1 as the main components and about 4 to about 9% by weight of pyruvate, about 5 to about 15% by weight of succinate, about 0.5 to about 7% by weight of rhamnose and about 0.2 to about 5% by weight of mannose as subsidiary components obtained by fermentation using a mixed culture of more than one microorganism of which at least one microorganism is capable of producing a polysaccharide in pure culture.
Claim 2
Dependent Claim
88 words
Extracellular polysaccharides containing glucose and galactose in a molar ratio of about 4:1 to about 8:1 as the main components and about 4 to about 9% by weight of pyruvate, about 5 to about 15% by weight of succinate, about 0.5 to about 7% by weight of rhamnose and about 0.2 to about 5% by weight of mannose as subsidiary components obtained by fermentation using a mixed culture of more than one microorganism of which at least one microorganism is capable of producing a polysaccharide in pure culture.
Claim 3
Dependent Claim
37 words
A process for the preparation of polysaccharides as claimed in claim 1 by fermentation which comprises employing a mixed culture of more than one microorganism of which at least one also produces an exopolysaccharide in pure culture.
Claim 4
Dependent Claim
19 words
The process as claimed in claim 2, wherein one of the microorganisms is the strain Pseudomonas maltophilia DSM 2130.
Claim 5
Dependent Claim
19 words
The process as claimed in claim 2, wherein one of the microorganisms is the strain Agrobacterium tumefaciens DSM 2128.
Claim 6
Dependent Claim
19 words
The process as claimed in claim 3, wherein one of the microorganisms is the strain Agrobacterium tumefaciens DSM 2128.
Claim 7
Dependent Claim
21 words
The process as claimed in claim 2, wherein the polymer formed is isolated from the fermentation medium by ultrafiltration and/or precipitation.
Claim 8
Dependent Claim
14 words
A substantially pure culture of Paeudomonas maltophilia DSM 2130 capable of producing extracellular polysaccharides.
Claim 9
Dependent Claim
14 words
A substantially pure culture of Paeudomonas maltophilia DSM 2130 capable of producing extracellular polysaccharides.
Claim 10
Dependent Claim
13 words
A substantially pure culture of Agrobacterium tumefaciens DSM2128 capable of producting extracellular polysacchrides.
Claim 11
Dependent Claim
13 words
A substantially pure culture of Agrobacterium tumefaciens DSM2128 capable of producting extracellular polysacchrides.
Claim 12
Dependent Claim
13 words
An essentially biologically pure culture of the 30 strain claimed in claim 7.
Claim 13
Dependent Claim
73 words
Mutants and variants of the strain claimed in claim 7, capable of producing in a mixed culture extracellular polysaccharides containing glucose and galactose in a molar ratio of about 4:1 to 8:1 as the main components and about 4 to 9% by weight of pyruvate, about 5 to 15% by weight of succinate, about 0.5 to 7% by weight of rhamnose and about 0.2 to 5% by weight of mannose as subsidiary components.
Claim 14
Dependent Claim
12 words
An essentially biologically pure culture of the strain claimed in claim 8.
Claim 15
Dependent Claim
72 words
Mutants and variants of the strain claimed in claim 8 capable of producing in a mixed culture extracellular polysaccharides containing glucose and galactose in a molar ratio of about 4:1 to 8:1 as the main components and about 4 to 9% by weight of pyruvate, about 5 15% by weight of succinate, about 0.5 to 7% by weight of rhamnose and about 0.2 to 5% by weight of mannose as subsidiary components.
Claim 16
Dependent Claim
11 words
A mixed culture of Pseudomonas maltophilia DSM2130 and Agrobacterium tumefaciens DSM2128.
Claim 17
Dependent Claim
11 words
A mixed culture of Pseudomonas maltophilia DSM2130 and Agrobacterium tumefaciens DSM2128.
Claim 18
Dependent Claim
22 words
A process for regulating the viscosity of liquid systems which comprises adding to the system a polysaccharide as claimed in claim 1.
Claim 19
Dependent Claim
15 words
The process as claimed in claim 14, wherein the liquid system is an aqueous system.
References Cited (Backward Citations)
US4329448A
Cited
US4304906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |