Patents by Inventor Moenes L. Elias

Moenes L. Elias 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).

  • Dissolution of metals utilizing tungsten
    Patent number: 4525240
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of tungsten.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: June 25, 1985
    Assignee: Plastic Specialties and Technologies, Inc.
    Inventors: Moenes L. Elias, Walter L. Burger
  • Dissolution of metals utilizing tungsten-diol combinations
    Patent number: 4522683
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and combinations of catalytic amounts of tungsten and of certain diols.
    Type: Grant
    Filed: January 12, 1984
    Date of Patent: June 11, 1985
    Assignee: Plastic Specialties and Technologies, Inc.
    Inventors: Moenes L. Elias, Walter L. Burger
  • Dissolution of metals
    Patent number: 4437931
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and certain primary diols.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: March 20, 1984
    Assignee: Dart Industries Inc.
    Inventors: Moenes L. Elias, Walter L. Burger
  • Metal stripping composition and method
    Patent number: 4297257
    Abstract: A composition for stripping solder and tin from a copper substrate having an extended life is provided by the inclusion of a polyacrylamide in a peroxide-fluoride based stripping composition. The presence of the polyacrylamide minimizes the adverse effect of the stripping composition on the copper substrate of the material undergoing treatment.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: October 27, 1981
    Assignee: Dart Industries Inc.
    Inventors: Moenes L. Elias, Narendra K. Shah
  • Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.Y --H.sub.2 O.sub. -mercapto containing heterocyclic nitrogen etchant
    Patent number: 4236957
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a heterocyclic nitrogen compound containing at least one free mercapto group substitution.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: December 2, 1980
    Assignee: Dart Industries Inc.
    Inventors: Silvester P. Valayil, Moenes L. Elias
  • Dissolution of metals utilizing an aqueous H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 -thioamide etchant
    Patent number: 4233113
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a thioamide having the general formula ##STR1## wherein R is an aryl or a heterocyclic group.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: November 11, 1980
    Assignee: Dart Industries Inc.
    Inventors: Silvester P. Valayil, Moenes L. Elias
  • Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -polysulfide etchant
    Patent number: 4233112
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a polysulfide compound having the general formula ##STR1## wherein R is a hydroxyl group, a carboxyl group, a sulfonic acid group or a sulfonic acid salt group, each X independently from each other can be hydrogen, hydroxyl or C.sub.1 -C.sub.4 alkyl, each Y independently from each other can be hydrogen, hydroxyl or C.sub.1 -C.sub.4 alkyl, m is an integer from 1 to 18, and n is an integer from 2 to 5.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: November 11, 1980
    Assignee: Dart Industries Inc.
    Inventors: Silvester P. Valayil, Moenes L. Elias
  • Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -3-sulfopropyldithiocarbamate etchant
    Patent number: 4233111
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of 3-sulfopropyldithiocarbamate sodium salt having the general formula ##STR1## wherein R can be a C.sub.1 -C.sub.4 alkyl group, phenyl, a C.sub.7 -C.sub.10 alkaryl group or a C.sub.7 -C.sub.10 aralkyl group.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: November 11, 1980
    Assignee: Dart Industries Inc.
    Inventors: Silvester P. Valayil, Moenes L. Elias
  • Dissolution of metals utilizing a H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 solution catalyzed with hydroxy substituted cycloparaffins
    Patent number: 4174253
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and an effective amount of a mono- or dihydroxy-substituted cycloparaffin.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: November 13, 1979
    Assignee: Dart Industries Inc.
    Inventors: Moenes L. Elias, Philip D. Readio
  • Dissolution of metals-utilizing H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 -thiosulfate etchant
    Patent number: 4130455
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a thiosulfate of sodium or potassium.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: December 19, 1978
    Assignee: Dart Industries Inc.
    Inventors: Moenes L. Elias, Millard F. Good