As per patent office journal dated 27/08/2021, patent number 374974 has been granted to JENNEWEIN BIOTECHNOLOGIE GMBH that is titled PROCESS FOR PURIFICATION OF A NEUTRAL HUMAN MILK OLIGOSACCHARIDE USING SIMULATED MOVING BED CHROMATOGRAPHY.
The primary independent claim of this patent states a process for purification of a neutral human milk oligosaccharide in a continuous chromatography from a crude solution comprising the neutral human milk oligosaccharide and contaminants, wherein the crude solution comprising the neutral human milk oligosaccharide and contaminants comprises or consists of a solution which is selected from the group consisting of microbial fermentation extract, biocatalysis reaction solution, chemical synthesis solution, and combinations thereof, wherein the purity of the neutral human milk oligosaccharide in the solution is <80 %, characterized in that the crude solution is applied to at least one purification step using simulated moving bed chromatography, wherein a purified solution comprising the neutral human milk oligosaccharide with a purity of 80 % is provided and wherein the purified solution is spray-dried, and neutral HMO is selected from the group consisting of 2’- fucosyllactose, 3-fucosyllactose, 2’,3-difucosyllactose, lacto-N-triose II, lacto-Ntetraose, lacto-N-neotetraose, lacto-N-fucopentaose I, lacto-N-neofucopentaose I, lacto-N-fucopentaose II, lacto-N-fucopentaose III, lacto-N-fucopentaose V, lactoN-neofucopentaose V, lacto-N-difucohexaose I, lacto-N-difucohexaose II, 6’- galactosyllactose, 3’-galactosyllactose, lacto-N-hexaose, lacto-N-neohexaose, para-lacto-N-hexaose, para-lacto-N-neohexaose and difucosyl-lacto-N-neohexaose, most preferably, the neutral HMO is 2´-fucosyllactose or lacto-N-tetraose.
During the patent prosecution, the patent examiner objected to this patent under section 3(d) of the Indian Patents Act. The patent applicant responded to this objection by stating that amended claims of the present invention are a novel process and not a mere use of known process. Therefore, the present invention does not fall under section 3(d) of the Patents Act.
This patent falls under the category of Chemical. Overall, this patent covers a process for purification of a neutral human milk oligosaccharide in a continuous chromatography from a crude solution comprising the neutral human milk oligosaccharide and contaminants, wherein the crude solution comprising the neutral human milk oligosaccharide and contaminants comprises or consists of a solution which is selected from the group consisting of microbial fermentation extract, biocatalysis reaction solution, chemical synthesis solution, and combinations thereof, wherein the purity of the neutral human milk oligosaccharide in the solution is <80 %, characterized in that the crude solution is applied to at least one purification step using simulated moving bed chromatography, wherein a purified solution comprising the neutral human milk oligosaccharide with a purity of 80 % is provided and wherein the purified solution is spray-dried, and neutral HMO is selected from the group consisting of 2’- fucosyllactose, 3-fucosyllactose, 2’,3-difucosyllactose, lacto-N-triose II, lacto-Ntetraose, lacto-N-neotetraose, lacto-N-fucopentaose I, lacto-N-neofucopentaose I, lacto-N-fucopentaose II, lacto-N-fucopentaose III, lacto-N-fucopentaose V, lactoN-neofucopentaose V, lacto-N-difucohexaose I, lacto-N-difucohexaose II, 6’- galactosyllactose, 3’-galactosyllactose, lacto-N-hexaose, lacto-N-neohexaose, para-lacto-N-hexaose, para-lacto-N-neohexaose and difucosyl-lacto-N-neohexaose, most preferably, the neutral HMO is 2´-fucosyllactose or lacto-N-tetraose.
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