Patents by Inventor Walter Steinmetzer

Walter Steinmetzer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for manufacturing a humectant
    Patent number: 5369122
    Abstract: In a process for manufacturing a humectant with a chemical structure similar to that of natural moisture regulators, residual molasses from sugar beet molasses are treated and the organic acids contained, in particular L-2-pyrrolidone-5-carboxlyic acid and lactic acid, are obtained and then neutralized and concentrated to form a humectant.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: November 29, 1994
    Assignee: Amino GmbH
    Inventor: Walter Steinmetzer
  • Process for recovering amino acids from protein hydrolysates
    Patent number: 4496703
    Abstract: Amino acid fractions of different composition are obtained at different times by fractional filtration after neutralization of the hydrolysates. Tyrosine-rich and leucine-rich fractions are specifically treated and lead to the recovery of L-tyrosine, L-cystine, L-leucine and L-phenyl-alanine.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: January 29, 1985
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventor: Walter Steinmetzer
  • Process for recovering amino acids from protein hydrolysates
    Patent number: 4384136
    Abstract: Amino acid fractions of different composition are obtained at different times by fractional filtration after neutralization of the hydrolysates. Tyrosine-rich and leucine-rich fractions are specifically treated and lead to the recovery of L-tyrosine, L-cystine, L-leucine and L-phenyl-alanine.
    Type: Grant
    Filed: December 4, 1981
    Date of Patent: May 17, 1983
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventor: Walter Steinmetzer
  • Process for separating leucine, isoleucine and valine
    Patent number: 4263450
    Abstract: A solution of leucine, isoleucine and valine is concentrated at a pH-value of from 1.5 to 2.0 to produce a mother liquor enriched with isoleucine and valine and a solid phase enriched with leucine. Concentrated hydrochloric acid is added to the mother liquor enriched with isoleucine and valine and, after concentration, a mother liquor enriched with valine and leucine and a solid phase enriched with isoleucine are obtained.
    Type: Grant
    Filed: July 15, 1980
    Date of Patent: April 21, 1981
    Assignee: Societe d'Assistance Technique pour Produits Nestle S.A.
    Inventor: Walter Steinmetzer