US4311795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysaccharide S-53 and bacterial fermentation process for its preparation
Assignee: CP Kelco US Inc
•
Filing: 1980-11-24
•
Granted: 1982-01-19
•
Expires: 2000-11-24
Abstract
Abstract A novel polysaccharide S-53, having a composition of 18-19% uronic acid, 4.8% pyruvate, and 7% acetyl as the O-glycosidically linked ester; and the remainder neutral sugar, 51% glucose and 49% fucose. This polysaccharide is produced by the strain of Klebsiella pneumoniae, ATCC No. 31488 growing in a suitable fermentation medium.
Inventors
- 👤 Kenneth S. Kang
- 👤 George T. Veeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:14
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08; C08L; C08L5/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/852
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
A process for producing a heteropolysaccharide S-53 comprising incubating in a fermentation medium containing a carbon source, a source of potassium ions, a source of nitrogen, preferably including soy peptone; trace inorganic elements and water, the Klebsiella pneumoniae organism, ATCC 31488, at a temperature of 30° C. and pH of 6.5 for 50 hours, and recovering the gum by precipitation with a suitable lower alcohol, such as isopropanol.
Claim 2
Dependent Claim
68 words
A process for producing a heteropolysaccharide S-53 comprising incubating in a fermentation medium containing a carbon source, a source of potassium ions, a source of nitrogen, preferably including soy peptone; trace inorganic elements and water, the Klebsiella pneumoniae organism, ATCC 31488, at a temperature of 30° C. and pH of 6.5 for 50 hours, and recovering the gum by precipitation with a suitable lower alcohol, such as isopropanol.
Claim 3
Dependent Claim
19 words
The process of claim 1 in which NaNo 3 is added in a proper amount to the fermentation medium.
References Cited (Backward Citations)
US4186025A
Cited
US4247639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |