US4529797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heteropolysaccharide S-198
Assignee: CP Kelco US Inc
•
Filing: 1984-03-08
•
Granted: 1985-07-16
•
Expires: 2004-03-08
Abstract
Abstract A novel polysaccharide S-198 is disclosed composed of principally carbohydrate, 9-12% protein, and 2-4% O-acyl groups (calculated as O-acetyl). The carbohydrate portion comprises about 13-18% glucuronic acid and the neutral sugars mannose, glucose, and rhamnose in the approximate molar ratio 1:2:2. This polysaccharide is produced by a new Alcaligenes species ATCC 31853, in a suitable fermentation medium.
Inventors
- 👤 Jerry A. Peik
- 👤 Suzanna M. Steenbergen
- 👤 Harold R. Hayden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P21/00; C12P21/005; C12R; C12R2001/00; C12R2001/01; C12R2001/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
64 words
The heteropolysaccharide S-198, which is principally carbohydrate, comprising 2-4% (calculated as O-acetyl) O-acyl groups, said O-acyl groups being primarily O-acetyl and O-succinyl and substantially free of O-formyl, 13-17.6% glucuronic acid, and the neutral sugars mannose, glucose, and rhamnose in the approximate molar ratio 1:2:2, wherein the ratio of terminally linked rhamnose to 1,4 linked rhamnose is 2:1 and the mannose is principally 1,4 linked.
Claim 2
Dependent Claim
64 words
The heteropolysaccharide S-198, which is principally carbohydrate, comprising 2-4% (calculated as O-acetyl) O-acyl groups, said O-acyl groups being primarily O-acetyl and O-succinyl and substantially free of O-formyl, 13-17.6% glucuronic acid, and the neutral sugars mannose, glucose, and rhamnose in the approximate molar ratio 1:2:2, wherein the ratio of terminally linked rhamnose to 1,4 linked rhamnose is 2:1 and the mannose is principally 1,4 linked.
Claim 3
Dependent Claim
18 words
The heteropolysaccharide of claim 1 prepared by fermentation under controlled conditions of culture ATCC 31853, an Alcaligenes species.
Claim 4
Dependent Claim
16 words
The heteropolysaccharide of claim 1 prepared in a fermentation medium substantially free of Ca ++ ions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |