US4328308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-continuous method for production of xanthan gum using Xanthomanas campestris ATCC 31600 and Xanthomanas campestris ATCC 31602
Assignee: BP Corp North America Inc
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Filing: 1981-04-16
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Granted: 1982-05-04
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Expires: 2001-04-16
Abstract
Abstract Xanthan gum is produced by means of semi-continuous fermentation using a culture of either Xanthomonas campestris XCP-1 ATCC 31600 or Xanthomonas campestris P-107 ATCC 31602, in a minimal medium, allowing the system to ferment for a period of about 24 hours, withdrawing a portion of the fermented medium, recovering xanthan from the withdrawn portion, adding fresh, sterile medium to the residual medium and repeating the above cycle.
Inventors
- 👤 William P. Weisrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:50
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: 13
Claim 1
Independent Claim
97 words
A method for the production of xanthan gum which comprises introducing a culture of a degenerative resistant strain of selected bacteria from the group consisting of Xanthomonas campestris XCP-1 Xanthomonas campestris P-107, having the identifying characteristics of ATCC 31600 and ATCC 31602, respectively, into a fermentation zone containing a nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan gum from said portion, thereafter adding a fresh sterile volume of said medium to the residual liquid in said zone and repeating the above cycle.
Claim 2
Independent Claim
97 words
A method for the production of xanthan gum which comprises introducing a culture of a degenerative resistant strain of selected bacteria from the group consisting of Xanthomonas campestris XCP-1 Xanthomonas campestris P-107, having the identifying characteristics of ATCC 31600 and ATCC 31602, respectively, into a fermentation zone containing a nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan gum from said portion, thereafter adding a fresh sterile volume of said medium to the residual liquid in said zone and repeating the above cycle.
Claim 3
Dependent Claim
18 words
The method of claim 1 in which the degnerative resistant culture employed is Xanthomonas campestris XCP-1 ATCC 31600.
Claim 4
Dependent Claim
18 words
The method of claim 1 in which the degenerative resistant culture employed is Xanthomonas campestris P-107 ATCC 31602.
Claim 5
Dependent Claim
24 words
The method of claim 1 in which the withdrawn fermented medium amounts of from about 25-90% of the total liquid volume in said zone.
Claim 6
Dependent Claim
14 words
The method of claim 1 in which said nutrient medium is a minimal medium.
Claim 7
Dependent Claim
15 words
The method of claim 5 in which the minimal medium contains a complex nitrogen source.
Claim 8
Dependent Claim
16 words
The method of claim 6 in which said complex nitrogen source is derived from yeast extract.
Claim 9
Dependent Claim
23 words
The method of claim 1 wherein the amount of fresh sterile medium is essentially equal to the volume of said withdrawn fermented medium.
Claim 10
Dependent Claim
87 words
In a method for the production of xanthan gum, the steps which comprise introducing a strain of Xanthomonas campestris bacteria selected from a group consisting of Xanthomonas campestris XCP-1 ATCC 31600 and Xanthomonas campestris P-107 ATCC 31602, into a fermentation zone containing a liquid nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan from said portion and thereafter maintaining said strain in serial culture for at least 10 transfers without affecting xanthan productivity.
Claim 11
Dependent Claim
87 words
In a method for the production of xanthan gum, the steps which comprise introducing a strain of Xanthomonas campestris bacteria selected from a group consisting of Xanthomonas campestris XCP-1 ATCC 31600 and Xanthomonas campestris P-107 ATCC 31602, into a fermentation zone containing a liquid nutrient medium to produce both bacterial cell growth and xanthan gum, withdrawing a portion of the fermented medium from said zone, recovering xanthan from said portion and thereafter maintaining said strain in serial culture for at least 10 transfers without affecting xanthan productivity.
Claim 12
Dependent Claim
16 words
The method of claim 9 in which the strain employed is Xanthomonas campestria XCP-1 ATCC 31600.
Claim 13
Dependent Claim
16 words
The method of claim 9 in which the strain employed is Xanthomonas campestris P-107 ATCC 31602.
References Cited (Backward Citations)
GB1512536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |