Patents by Inventor Philip D. Readio

Philip D. Readio 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-chromate conversion coatings
    Patent number: 4225350
    Abstract: Improved color, brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a silicate and at least one cationic triarylmethane dye. Certain organophosphorus compound additives further enhance the corrosion resistance.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: September 30, 1980
    Assignee: Dart Industries Inc.
    Inventors: John L. H. Allan, Philip D. Readio, Ajay M. Bengali, Richard F. Zuendt
  • Non-chromate conversion coatings
    Patent number: 4225351
    Abstract: Improved brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide, a silicate, certain primary organophosphorus compound promoters and at least one secondary promoter selected from ascorbic acid, boric acid, gluconic acid, glycolic acid, tartaric acid and salts of said acids.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: September 30, 1980
    Assignee: Dart Industries Inc.
    Inventors: Richard F. Zuendt, Ajay M. Bengali, Philip D. Readio, John L. H. Allan
  • Non-chromate conversion coatings
    Patent number: 4222779
    Abstract: Improved brightness and corrosion resistance are imparted to metal surfaces such as zinc plated surfaces, by treatment with a non-toxic solution comprised of sulfuric acid, hydrogen peroxide and a silicate. Certain organophosphorus and organonitrogen compound additives further enhance the corrosion resistance.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: September 16, 1980
    Assignee: Dart Industries Inc.
    Inventors: Ajay M. Bengali, Richard F. Zuendt, John L. H. Allan, Philip D. Readio
  • 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 a H.sub.2 O.sub.2 -sulfuric acid solution catalyzed with ketone compounds
    Patent number: 4158592
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and an effective amount of a ketone soluble in the solution.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: June 19, 1979
    Assignee: Dart Industries Inc.
    Inventors: Philip D. Readio, John L. H. Allan
  • Dissolution of metals utilizing a H.sub.2 O.sub.2 -sulfuric acid solution catalyzed with selenium compounds
    Patent number: 4158593
    Abstract: Clean etchings at high rates are obtained using a solution containing sulfuric acid, hydrogen peroxide, a catalytic amount of a selenium compound of a +4 oxidation state and a secondary or tertiary alcohol.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: June 19, 1979
    Assignee: Dart Industries Inc.
    Inventors: John L. H. Allan, Philip D. Readio
  • Dissolution of metals
    Patent number: 4141850
    Abstract: Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and certain primary diols.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: February 27, 1979
    Assignee: Dart Industries Inc.
    Inventors: Philip D. Readio, John L. H. Allan
  • Dissolution of metals with a selenium catalyzed H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 etchant containing t-butyl hydroperoxide
    Patent number: 4140646
    Abstract: Clean etchings at high rates are obtained using a solution containing sulfuric acid, hydrogen peroxide, a catalytic amount of a selenium compound of a +4 oxidation state and t-butyl hydroperoxide.
    Type: Grant
    Filed: November 8, 1977
    Date of Patent: February 20, 1979
    Assignee: Dart Industries Inc.
    Inventors: Ronald A. Kent, John L. H. Allan, Philip D. Readio
  • Electroplating baths for nickel and brightener-leveler compositions therefor
    Patent number: 3953304
    Abstract: An aqueous acid nickel electroplating bath containing as a brightener-leveling agent the reaction product of an acetylenic diester of a halogenated saturated aliphatic acid with a heterocyclic compound containing a tertiary nitrogen atom. The brightener may have the general formula ##EQU1## wherein R.sub.1 and R.sub.2 are hydrogen, halogen or a hydroxy, carboxy, carboxyester, sulphoxy, alkyl, amino or amido group;R.sub.3 is a hydrogen or an alkyl group;R.sub.4 and R.sub.5 are hydrogen or an alkyl group;X is halogen andN is an integer from 0 to 2.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: April 27, 1976
    Assignee: Dart Industries Inc.
    Inventors: John L. Allan, Kollengode V. Srinivasan, Philip D. Readio, Judit Cestero