US4352882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of xanthan gum by emulsion fermentation
Assignee: Kelco Biospecialties Ltd
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Filing: 1981-09-08
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Granted: 1982-10-05
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Expires: 2001-09-08
Abstract
Abstract Preparation of xanthan gum is effected by dispersing the aqueous xanthamonas culture medium in a water insoluble oil such as a hydrocarbon or vegetable oil. Such dispersions generate substantially less viscosity and as a result, fermentation can be carried out to a higher polymer content with less energy input.
Inventors
- 👤 Lucien G. Maury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:09
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; C12P1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
In the method of conducting a fermentation reaction wherein an aqueous culture medium comprising a carbohydrate source and a nitrogen source is inoculated with a polysaccharide gum producing microorganism and said medium is mechanically agitated and aerated under conditions to effect fermentation thereof, the improvement which comprises said culture medium being dispersed in about 20 to 80% of its weight of a water insoluble oil in which the resultant polysaccharide is also insoluble.
Claim 2
Dependent Claim
73 words
In the method of conducting a fermentation reaction wherein an aqueous culture medium comprising a carbohydrate source and a nitrogen source is inoculated with a polysaccharide gum producing microorganism and said medium is mechanically agitated and aerated under conditions to effect fermentation thereof, the improvement which comprises said culture medium being dispersed in about 20 to 80% of its weight of a water insoluble oil in which the resultant polysaccharide is also insoluble.
Claim 3
Dependent Claim
17 words
The method of claim 1 wherein the culture medium is dispersed in the oil via a surfactant.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the water insoluble oil is a hydrocarbon having 8 or more carbon atoms or a mixture of such hydrocarbons.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the water insoluble oil is mineral oil.
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) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |