The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 20, 1976
Filed:
Jul. 18, 1974
David Shepherd, Morges, CH;
Jaroslav Dasek, Yverdon, CH;
Societe d'Assistance Technique pour Produits Nestle S.A., Lausanne, CH;
Abstract
A process for the preparation of zeaxanthin which comprises culturing a microorganism of the genus Flavobacter producing this pigment, in a nutrient medium containing at least one carbohydrate as assimilable carbon source, at least one source of assimilable amino nitrogen containing free amino acids, mineral salts, oligoelements and vitamins, the spectrum of amino acids of the medium being modified by increasing the content in the medium of at least one of the sulphur-containing amino acids methionine, cystine and cysteine, in relation to the content in the medium of other amino acids, whilst limiting the quantity of the sulphur-containing amino acid added to the medium to a value not exceeding 1 mg/ml, and continuing culturing until a substantial quantity of intracellular zeaxanthin has been obtained.