Patents by Inventor Algird S. Cibulskas

Algird S. Cibulskas 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).

  • Clarification of protein precipitate suspensions using anionic polymeric flocculants
    Patent number: 6927282
    Abstract: Protein suspensions comprising soluble and insoluble components are purified via flocculation with anionic polymers, such as polyacrylamides, potato starch, or modified cellulose. The procedure improves the efficiency of solid/liquid separations and can minimize or eliminate the requirement for centrifugation and/or filtration in large scale biotechnological processes. The method is particularly well suited for the purification and clarification of protein suspensions containing soluble somatotropin monomer using polyacrylamide and polysaccharide flocculants.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: August 9, 2005
    Assignees: Monsanto Technology LLC, Cytec Technology Corp.
    Inventors: Mark L. Chivers, Algird S. Cibulskas
  • Use of blends of mannich acrylamide polymers and dimethyldiallylammonium halide polymers for flocculating enzyme broth streams
    Patent number: 4997759
    Abstract: Blends of Mannich acrylamide polymers and dimethyldiallylammonium halide polymers have been found to be superior flocculants for enzyme broth streams yielding higher solid compaction and greater supernatant clarities than the use of either polymer alone.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: March 5, 1991
    Assignee: American Cyanamid Company
    Inventors: Algird S. Cibulskas, Henri R. Asbell
  • Controlled polymerization of dimethyldiallylammonium halides by the use of alkali metal or ammonium bisulfites or metabisulfites
    Patent number: 4092467
    Abstract: An alkali metal or ammonium bisulfite or metabisulfite added incrementally to a polymerizing aqueous solution of dimethyldiallylammonium halide enables control of the intrinsic viscosity of the resulting polymer within desired limits without adverse effect on monomer conversion.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: May 30, 1978
    Assignee: American Cyanamid Company
    Inventors: Richard P. Welcher, Robert Rabinowitz, Algird S. Cibulskas