Patents by Inventor Shankar C. Acharya

Shankar C. Acharya 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).

  • Solder/braze-stop composition
    Patent number: 4439250
    Abstract: An improved solder/braze-stop composition is impervious to splattered or flowed solder/braze material, is easily coated without streaking, is easily removed and leaves no contaminant residue. The improved solder/braze-stop composition comprises by weight:40-57% Al.sub.2 O.sub.3 powder;27-43% Methyl Isobutyl Ketone; and12-22% of a vehicle comprising by weight:15-20% Ethyl Cellulose;75-80% 2- (2-Butoxyethoxy) Ethyl Acetate; and,5-10% Oleoyl Sarcosine.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: March 27, 1984
    Assignee: International Business Machines Corporation
    Inventors: Shankar C. Acharya, Thomas C. Prizzia, Olha Rutigliano