US4245046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the fermentative production of xanthan gum with organic acids
Assignee: Massachusetts Institute of Technology
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Filing: 1979-03-23
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Granted: 1981-01-13
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Expires: 1999-03-23
Abstract
Abstract Xanthan gum is produced by fermentation with the bacterium, Xanthomonas campestris NRRL B-1459, of a nutrient medium containing a sugar and a stimulatory organic acid which stimulates the production of xanthan gum. The stimulatory organic acid can be a source of pyruvic acid, alpha-keto-glutaric acid, succinic acid or mixtures thereof.
Inventors
- 👤 Arnold L. Demain
- 👤 Peter Souw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:46
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/04; C12P19/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
In the process for the production of xanthan gum by the fermentative conversion of a nutrient composition containing a sugar carbon source with the bacterium Xanthomonas campestris NRRL B-1459, the improvement which comprises adding to said nutrient medium an organic acid that stimulates the conversion to xanthan gum, said organic acid selected from the group consisting of α-keto glutaric acid, pyruvic acid, salts thereof, esters thereof and mixtures thereof.
Claim 2
Dependent Claim
69 words
In the process for the production of xanthan gum by the fermentative conversion of a nutrient composition containing a sugar carbon source with the bacterium Xanthomonas campestris NRRL B-1459, the improvement which comprises adding to said nutrient medium an organic acid that stimulates the conversion to xanthan gum, said organic acid selected from the group consisting of α-keto glutaric acid, pyruvic acid, salts thereof, esters thereof and mixtures thereof.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the organic acid is α-keto glutaric acid.
Claim 4
Dependent Claim
15 words
The process of claim 2 wherein the nutrient composition contains a source of citric acid.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the organic acid is pyruvic acid.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein the nutrient composition contains a source of citric acid.
Claim 7
Dependent Claim
15 words
The process of claim 1 wherein the nutrient composition contains a source of citric acid.
References Cited (Backward Citations)
US4119546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |