Patents by Inventor Major S. Dhillon

Major S. Dhillon 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).

  • Amino acid stabilizers for water soluble diazonium compound condensation products
    Patent number: 4554236
    Abstract: This invention relates to light sensitive water soluble diazonium compound condensation products stabilized against degradation caused by heat and/or prolonged storage employing selected amino acids as stabilizers. The invention also relates to presensitized reproduction materials comprising the amino acid stabilized water soluble diazonium compound condensation products.
    Type: Grant
    Filed: October 19, 1983
    Date of Patent: November 19, 1985
    Assignee: American Hoechst Corporation
    Inventors: Trisha Bentley, John E. Walls, Major S. Dhillon
  • Cleansing agent for printing plates
    Patent number: 4504406
    Abstract: A cleansing agent for lithographic printing plates having substantially reduced aromatic components. The plate cleaner comprises an aqueous mixture of substantially aliphatic hydrocarbons, a composition comprising one or more non-ionic emulsifying agents and/or non-ionic surfactants, an alkaline salt electrolyte and an optional organic or inorganic acid.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: March 12, 1985
    Assignee: American Hoechst Corporation
    Inventor: Major S. Dhillon
  • Electrolysis treatment of light sensitive diazo coated supports
    Patent number: 4452877
    Abstract: Presensitized lithographic printing plates, having extended press run life, are provided by electrolytically passing a current through the light-sensitive material in the prefabricated plate. Press runs of up to sixty percent longer than expected are possible with plates which are so treated.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: June 5, 1984
    Assignee: American Hoechst Corporation
    Inventor: Major S. Dhillon
  • Negative working diazo contact film
    Patent number: 4448873
    Abstract: A photographic element comprising a transparent support and a coating on the support comprising a diazonium composition having a light absorbency of about 45% or less, and a colorant composition, said coating having a light transmission of not more than about 0.1%.
    Type: Grant
    Filed: March 18, 1982
    Date of Patent: May 15, 1984
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Major S. Dhillon
  • Sulfur and/or amide-containing exposure accelerators for light-sensitive coatings with diazonium compounds
    Patent number: 4446218
    Abstract: This invention relates to proof film-type light sensitive diazonium materials containing accelerators selected from sulfur and/or amide-containing compounds which are capable of accelerating the contact exposure of negative-working diazonium compounds when such diazonium compounds are subjected to UV radiation. These accelerators enhance essentially photosensitivity speed. The invention also relates to presensitized reproduction materials comprising diazonium materials containing these accelerators.
    Type: Grant
    Filed: March 18, 1982
    Date of Patent: May 1, 1984
    Assignee: American Hoechst Corporation
    Inventor: Major S. Dhillon