Patents by Inventor Mark C. Wolff

Mark C. Wolff 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).

  • Non-flammable, high-solvency compositions comprising trans-1,2-dichloroethylene, solvent, and inerting agent
    Patent number: 6852684
    Abstract: Disclosed are non-flammable, high-solvency compositions having utility as cleaning agents in the electronics and refrigeration industries, and as a medium for mold release agents. The compositions are non-flammable by Flame Extension Test ASTM D-3065 and Flash Point-Tag Closed Cup Test ASTM D-56-82, and have a Kauri Butanol value of at least about 40 by ASTM 1133-94. The compositions comprise the components: a.) trans-1,2-dichloroethylene; and b.) solvent selected from: i.) oxygen-containing solvents selected from alcohols, ketones, esters, siloxanes, and ethers; and ii.) hydrocarbon solvents represented by CtH2t+2 or CtH2t, wherein t is from 4 to 8; and c.) an inerting agent selected from: i.) hydrofluorocarbon inerting agents represented by the formula CxHyF(2x+2?y), wherein x is from 3 to 8, y is from 1 to 4, and the mole ratio of F/H in the hydrofluorocarbon inerting agent is greater than 1.6; ii.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: February 8, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Greg A. Westbrook, Thomas L. Tattersall, Mark C. Wolff
  • Cleaning composition of dibasic ester, hydrocarbon solvent, compatibilizing surfactant and water
    Patent number: 5084200
    Abstract: A cleaning composition is disclosed which is suitable for cleaning flux residue from a printed circuit board and comprises dibasic ester, a hydrocarbon solvent, a compatibilizing surfactant and water.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: January 28, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth T. Dishart, Mark C. Wolff, Harold L. Jackson
  • Cleaning composition of dibasic ester, hydrocarbon solvent and compatibilizing component
    Patent number: 5062988
    Abstract: A cleaning composition is disclosed which is suitable for cleaning flux residue from a printed circuit board and comprises dibasic ester solvent, a hydrocarbon solvent and a compatibilizing component.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: November 5, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth T. Dishart, Mark C. Wolff
  • Cleaning composition of dibasic ester and hydrocarbon solvent
    Patent number: 5011620
    Abstract: A cleaning composition is disclosed which is suitable for cleaning flux residue from a printed circuit board and comprises dibasic ester solvent and a hydrocarbon solvent.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: April 30, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth T. Dishart, Mark C. Wolff
  • Cleaning composition of terpene compound and dibasic ester
    Patent number: 4867800
    Abstract: A cleaning composition is disclosed which is suitable for cleaning flux residue from a printed circuit board and comprises a terpene compound and dibasic ester solvent.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: September 19, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth T. Dishart, Mark C. Wolff