Patents by Inventor Rodika Gutman

Rodika Gutman 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 the removal of urea from aqueous solutions
    Patent number: 4392960
    Abstract: A process for the removal of urea from an aqueous solution containing same, which comprises subjecting the solution to reverse osmosis through a polymeric membrane prepared from a polymer of the formula--(--A--X--).sub.nwhereinA designates an aromatic moiety andX designates a bivalent linking group, the aromatic moiety A being chosen from the group consisting of phenyl, biphenyl, naphthyl, and mixtures of such moieties; and such moieties connected by means of linkages selected from --O--, --SO.sub.2 --, --SO--, --NH--, --CH.sub.
    Type: Grant
    Filed: January 27, 1976
    Date of Patent: July 12, 1983
    Assignee: A. T. Ramot Plastics, Ltd.
    Inventors: Menahem A. Kraus, Moshe A. Frommer, Mara Nemas, Rodika Gutman
  • Aromatic diamino phosphoramides, thiophosphoramides and phosphoramidates
    Patent number: 4360480
    Abstract: The present invention relates to novel aromatic diamino phosphoramides, thiophosphoramides and phosphoramidates and to a process for the production of same.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: November 23, 1982
    Assignee: A.T. Ramot Plastics Ltd.
    Inventors: Menahem A. Kraus, Moshe A. Frommer, Mara Nemas, Rodika Gutman
  • Polyamide from aromatic phosphorus containing diamine
    Patent number: 4233434
    Abstract: The present invention relates to novel aromatic and araliphatic polymers and copolymers based on phosphoric acid and thiophosphoric acid amides, esters and thioesters, to monomers for the production of these and to various products prepared from such polymers and copolymers, such as films, membranes, fibers and shaped objects.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: November 11, 1980
    Inventors: Menahem A. Kraus, Moshe A. Frommer, Mara Nemas, Rodika Gutman