Patents by Inventor Leonard Shorr

Leonard Shorr 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).

  • Additive fire retardants, process for their preparation and polymeric compositions containing them
    Patent number: 5696311
    Abstract: Novel fire retardant compounds are disclosed, which are poly-halogenated TMPI and MPI compounds containing three or more halogen atoms per molecule. A process for the preparation of these compounds and polymeric compositions containing them are also described.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: December 9, 1997
    Assignee: Bromine Compounds, Ltd.
    Inventors: Leonard Shorr, Antebi Salomone, Theodor-Morel Fishler, Michael Eroshov, Ita Finberg
  • Additive fire retardants, process for their preparation and polymeric compositions containing them
    Patent number: 5679736
    Abstract: Novel fire retardant compounds are disclosed, which are poly-halogenated TMPI and MPI compounds containing three or more halogen atoms per molecule. A process for the preparation of these compounds and polymeric compositions containing them are also described.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: October 21, 1997
    Assignee: Bromine Compounds Limited
    Inventor: Leonard Shorr
  • Concentrated bromine solutions
    Patent number: 5415803
    Abstract: A novel composition of matter comprises a stable solution of elemental bromine and urea in water.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: May 16, 1995
    Assignee: Bromine Compounds, Inc.
    Inventor: Leonard Shorr
  • Process for the preparation of isothiazolone
    Patent number: 5315008
    Abstract: Mixtures of 2-methyl-isothiazolin-3-one (5H-MIT) and 5-chloro-2-methylisothiazolin-3-one (5Cl-MIT), are prepared by the chlorination of N-methyl-3-mercaptopropionamide (MMPA) with chlorine in a halogenated solvent in continuous operation.
    Type: Grant
    Filed: February 5, 1992
    Date of Patent: May 24, 1994
    Assignee: Bromine Compounds Ltd.
    Inventors: Reinhard Effenberger, Leonard Shorr, Yehuda Keren
  • Process for the manufacture of substituted maleimides
    Patent number: 5306828
    Abstract: In a process for the preparation of substituted maleimides the corresponding amines are reacted with maleic anhydride and the thermal imidization of the resulting substituted amic-acids is effected in a mixed apolar/polar aprotic solvent medium in the presence of an acid catalyst, a substantial portion of the apolar solvent is subsequently selectively removed from the reaction mixture and most of the final product is precipitated.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: April 26, 1994
    Assignee: Bromine Compounds Ltd.
    Inventors: Michel Adda, Chaim Eidelman, Leonard Shorr
  • Intermediates to tetrabromophthalic anhydride and process therefor
    Patent number: 5225573
    Abstract: Tetrabromophthalic anhydride and the corresponding free acid are propared by oxidizing in the liquid phase a compound of the formula ##STR1## each of A and A' is independently selected from oxygen, OH or acetoxy; each of R and R' is independently selected from H, OH, alkyl, alkylidene or oxygen;x is 0 or 1; y is 3-x; and R.sub.y and R'.sub.y may together form a closed alicyclic or heterocyclic ring structure.Mixtures of two or more compounds of formula (I), optionally in the presence of an oxidation catalyst, can also be employed as the starting material.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: July 6, 1993
    Assignee: Bromine Compounds Limited
    Inventors: Leonard Shorr, Michael Peled