Patents by Inventor Abraham B. Cohen, deceased

Abraham B. Cohen, deceased 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).

  • Cleaning composition of hydrocarbon component, surfactant and multibasic ester additive
    Patent number: 5196136
    Abstract: A cleaning composition is disclosed which is suitable for cleaning substrates and particularly for cleaning flux residues from a printed circuit board. The cleaning composition comprises a hydrocarbon component, a compatibilizing agent, a multibasic ester additive, and optionally water. The multibasic ester may be an alkanoic acid ester of a diol or polyol, an alkanoic acid ester of a hydroxy alkanoate alkyl ester, or and alkyl ester of a compound containing two or more carboxylic acid groups and one or more hydroxyl groups which are optionally esterified with an alkanoic acid group. The cleaning composition may be used as a solution or as an emulsion or dispersion to clean a substrate.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: March 23, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth T. Dishart, Harold L. Jackson, Abraham B. Cohen, deceased