Patents by Inventor Salvatore Emmi

Salvatore Emmi 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).

  • Photoresist article having a portable, conformable, built-on mask
    Patent number: 5240807
    Abstract: A water soluble built-on mask layer is provided on a photoresist composition disposed on a substrate. The photoresist comprises an o-quinone diazide and a novolak or paravinyl phenol resin. The built-on mask layer comprises a water soluble, photobleachable diazonium salt, a coupler for the diazonium salt and an acidic, polymeric, film forming resin such as polystyrene sulfonic acid.
    Type: Grant
    Filed: August 2, 1989
    Date of Patent: August 31, 1993
    Assignee: Hoechst Celanese Corporation
    Inventors: Sangya Jain, Salvatore Emmi, Thomas S. Phillips
  • Hydrophilic color coupler composition containing diepoxide
    Patent number: 4252894
    Abstract: Hydrophilic coupler-oil solutions are stabilized by the addition of an epoxide compound. These coupler compounds are dissolved, with the aid of epoxide compounds, in high boiling esters and dispersed in aqueous gel solutions to form dispersions of improved stability.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: February 24, 1981
    Assignee: GAF Corporation
    Inventors: Felix Viro, Salvatore Emmi
  • Hydrophilic coupler solutions
    Patent number: 3989529
    Abstract: Hydrophilic coupler solutions are improved by the addition of a diepoxide, pyruvaldehyde, ethyleneglycoldiglycidyl ether or 2,3-butanedione. These solutions exhibit greater stability and a reduced rate of viscosity increase when admixed into gelatin silver halide emulsions.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: November 2, 1976
    Assignee: GAF Corporation
    Inventors: Felix Viro, Salvatore Emmi