Patents Represented by Attorney W. E. Murray

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  • Semi-continuous method for production of xanthan gum using Xanthomanas campestris ATCC 31600 and Xanthomanas campestris ATCC 31602
    Patent number: 4328308
    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to ferment for a period of about 24 hours, withdrawing a portion of the fermented medium, recovering xanthan from the withdrawn portion, adding fresh, sterile medium to the residual medium and repeating the above cycle.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: May 4, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventor: William P. Weisrock
  • Method for improving specific xanthan productivity during continuous fermentation
    Patent number: 4311796
    Abstract: In the production of xanthan gum by the action of Xanthomonas bacteria on a nutrient medium, the specific productivity of the organism employed can be improved by the increase in average cell concentration through the stepwise increase of growth limiting nutrients in the medium.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: January 19, 1982
    Assignee: Standard Oil Company (Indiana)
    Inventor: William P. Weisrock