Patents by Inventor Steven Arnold Dombchik

Steven Arnold Dombchik 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).

  • Patent number: 5650097
    Abstract: Steel anticorrosion and lubricity composition consisting essentially of (a) a surfactant; (b) at least one neutralized alkyl phosphate in a surfactant:phosphate weight ratio in the range between 10:1 to 1:10, said phosphate having the general formula:(RO).sub.m --P--(O)--(OH).sub.nwherein R is an alkyl group having 4 to 20 carbon atoms; m is 1 or 2, and n is 3m; and optionally (c) 5 to 40 weight percent, based on the combined weight of said surfactant and said phosphate, of at least one carboxylic acid which has both a hydrophilic and a hydrophobic portion.
    Type: Grant
    Filed: October 6, 1995
    Date of Patent: July 22, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ernest Byron Wysong, James Allan Wingrave, Steven Arnold Dombchik, Edward Clarkin Squire
  • Patent number: 4055560
    Abstract: Yellow to orange, disazo acid dyes which have excellent application and fastness properties on nylon fibers, do not change shade under basic conditions and have the formula ##STR1## wherein SO.sub.3 M is meta or para to the azo group, R.sub.1 is selected from H, CH.sub.3, OCH.sub.3 and Cl, R.sub.2 and R.sub.3 are independently selected from H, CH.sub.3 and OCH.sub.3, R.sub.4 and R.sub.5 are independently selected from H, Cl and CH.sub.3, but only one can be Cl, R.sub.6 is selected from CH.sub.3 and C.sub.2 H.sub.5 and M is, C.sub.1-4 alkylammonium and C.sub.1-2 alkanolammonium cations.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: October 25, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Steven Arnold Dombchik
  • Patent number: 3986827
    Abstract: Storage-stable, concentrated, aqueous, disazo acid dye solution consisting essentially of 10-25 weight % of the lithium or tri(2-hydroxyethyl)ammonium salt of ##SPC1##Wherein one of X and Y is H and the other is CH.sub.3 and R.sup.1 is CH.sub.2 CH.sub.2 OH, CH.sub.2 CH(CH.sub.3)OH or CH.sub.2 CH(C.sub.2 H.sub.5)OH, 5-25 weight % of N-methyl-2-pyrrolidone and the balance, to 100%, water.
    Type: Grant
    Filed: May 20, 1974
    Date of Patent: October 19, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Steven Arnold Dombchik