Patents by Inventor Dinshaw B. Contractor

Dinshaw B. Contractor 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).

  • Brazing flux
    Patent number: 5785770
    Abstract: Brazing fluxes comprising a combination of a fluoroaluminate complex and selected metal fluorosilicates, including their method of manufacture and use, are disclosed.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: July 28, 1998
    Assignee: Advance Research Chemicals, Inc.
    Inventors: Dayal T. Meshri, Sanjay D. Meshri, Dinshaw B. Contractor, Jennifer Parker
  • Processes of producing potassium fluoroaluminates
    Patent number: 5318764
    Abstract: Potassium tetrafluoroaluminate and potassium hexafluoroaluminate have been produced by three new processes: (a) by reacting alumina trihydrate with freshly produced, hot, solvated potassium fluoride or potassium bifluoride solution in presence of stoichiometric amounts and/or an excess of hydrogen fluoride, or (b) by reacting aluminum trifluoride trihydrate with hot aqueous solution in potassium fluoride or potassium bifluoride, or (c) by generating in situ potassium aluminate by reacting alumina trihydrate with hot aqueous potassium hydroxide and treating the same with aqueous or anhydrous hydrogen fluoride.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: June 7, 1994
    Assignee: Advance Research Chemicals, Inc.
    Inventors: Dayal T. Meshri, Sampath H. Kumar, Sudhir S. Bhagat, Dinshaw B. Contractor, Sanjay Meshri