Patents by Inventor Pradyot Agaskar

Pradyot Agaskar 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).

  • Use of metal salts in the synthesis of oligomeric hydrogensilsesquioxanes via hydrolysis/condensation reactions
    Patent number: 5106604
    Abstract: Hydridospherosiloxanes and soluble hydrogensilsesquioxane resin are produced having the formula (HSiO.sub.3/2).sub.n, where n is an even integer greater than 8. A biphasic reaction medium is prepared, having a first solvent phase and a second solvent phase. The first solvent phase can contain a hydrocarbon solvent, such as an alcohol. The first solvent phase can be methanol or ethanol. The second solvent phase is a concentrated solution of a metal salt, such as Fe(III) in a polar organic solvent and water. A silicon compound represented by the formula: HSiX.sub.3, where X is a group which is hydrolyzable in the solvent of said first solvent phase, is added to the biphasic reaction medium. X can be Cl or OCH.sub.3. The first solvent phase is separated from the second solvent phase and then the separated first solvent phase is treated with a metal salt, such as sodium or potassium carbonate. Slow evaporation of the first solvent phase solvent is employed to isolate a mixture of crystals of (HSiO.sub.3/2).sub.
    Type: Grant
    Filed: March 12, 1991
    Date of Patent: April 21, 1992
    Inventor: Pradyot Agaskar