Patents by Inventor Uri Michael

Uri Michael 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).

  • Method for preparing an encapsulated slow-release particulate fertilizer
    Patent number: 5560768
    Abstract: Preparation of an encapsulated slow-release particulate fertilizer. A particulate fertilizer starting material is pretreated for increasing its capacity of holding powderous material by adhesion. The resulting first intermediary product is coated with a powderous waterproofing material which fuses below the phase transition temperature of the fertilizer. A second intermediary product obtained in this way is heated to a temperature below the phase transition temperature to fuse the waterproofing material.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: October 1, 1996
    Assignee: Haifa Chemicals South Ltd.
    Inventors: Boris Gordonov, Abraham Shaviv, Evgeny Zlotnikov, Uri Michael
  • Slow release fertilizers
    Patent number: 5454851
    Abstract: An encapsulated slow-release particulate fertilizer product comprising 50-95% by weight of fertilizer and an encapsulating waterproofing sulfurated coat selected from the group of sulfurated unsaturated oils and sulfurated distillation products and distillation residues thereof. The sulfurated coat may bear neutralized carboxylic groups and the product may optionally contain up to 5% by weight of an inert powder serving as conditioner. For making the product an unsaturated oil or a distillation product or residue thereof is reacted with a sulfurization agent and the reaction product is used for the encapsulation of a particulate fertilizer.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: October 3, 1995
    Assignee: Haifa Chemical South Ltd.
    Inventors: Evgeny Zlotnikov, Abraham Shaviv, Boris Gordonov, Uri Michael
  • Bis-2-furanidyl ether and method of preparation
    Patent number: 4212814
    Abstract: The present invention relates to a new process for the preparation of N.sup.1 -(2'-furanidyl)-5-fluoro-uracil, also called Ftorafur, which is a very important anti-cancer compound. Said process comprises reacting 2,3-dihydrofuran with water in the presence of a catalytic amount of an acidic catalyst at a pH below 2.5, removing excess of unreacted starting materials and reacting the mixture obtained with silylated-5-fluoro-uracil is in the presence of a Friedel Crafts type catalyst uracil in an inert organic solvent. The new process has many advantages in comparison with those used so far.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: July 15, 1980
    Assignee: Abic, Ltd.
    Inventors: Eva Schonberger, Zabar Sasson, Uri Michael
  • Process for the preparation of N.sup.1 -(2'-furanidyl)-5-fluoro-uracil
    Patent number: 4174446
    Abstract: The present invention relates to a new process for the preparation of N.sup.1 -(2'-furanidyl)-5-fluoro-uracil, also called Ftorafur, which is a very important anti-cancer compound. Said process comprises reacting 2,3-dihydrofuran with water in the presence of a catalytic amount of an acidic catalyst at a pH below 2.5, removing excess of unreacted starting materials and reacting the mixture obtained with silylated-5-fluoro-uracil is in the presence of a Friedel Crafts type catalyst uracil in an inert organic solvent. The new process has many advantages in comparison with those used so far.
    Type: Grant
    Filed: October 11, 1977
    Date of Patent: November 13, 1979
    Assignee: ABIC Ltd.
    Inventors: Eva Schonberger, Zabar Sasson, Uri Michael