Patents by Inventor David Herbert Donovan

David Herbert Donovan 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: 9454720
    Abstract: A method for halftone printing of an image may include receiving image data of an image to be printed. The method may also include processing the image data to generate, for each printing element of a plurality of printing elements which are designed to sharingly print a single color component of a color space, or for each pass of a single printing element which is designed to pass a plurality of passes over a single print area when printing that color component, a halftone pattern for the image for that color, that was independently generated for that printing element or for that pass. The method may further include printing, by each printing element of the plurality of printing elements or in each pass of a single printing element, the halftone pattern that was independently generated for that printing element or for that pass.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: September 27, 2016
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: David Herbert Donovan
  • Publication number: 20150103380
    Abstract: A method for halftone printing of an image may include receiving image data of an image to be printed. The method may also include processing the image data to generate, for each printing element of a plurality of printing elements which are designed to sharingly print a single color component of a color space, or for each pass of a single printing element which is designed to pass a plurality of passes over a single print area when printing that color component, a halftone pattern for the image for that color, that was independently generated for that printing element or for that pass. The method may further include printing, by each printing element of the plurality of printing elements or in each pass of a single printing element, the halftone pattern that was independently generated for that printing element or for that pass.
    Type: Application
    Filed: October 31, 2011
    Publication date: April 16, 2015
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventor: David Herbert Donovan
  • Patent number: 5851590
    Abstract: Ink jet ink compositions containing an aqueous carrier medium, an aqueous carrier medium insoluble colorant, a structured polymeric dispersant and a film-forming polyacrylamide polymer having a weight average molecular weight of 500-100,000 exhibit reduced film cracking, rapid drying, excellent image definition, are storage stable and have excellent decap properties and, when used in combination with a differently colored ink, result in reduced bleed in multi-colored printed elements.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: December 22, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David Herbert Donovan, Gregg Allen Lane, Chaucer C. Tang
  • Patent number: 5712338
    Abstract: Ink jet ink compositions containing an aqueous carrier medium, an aqueous carrier medium insoluble colorant, a structured polymeric dispersant and a film-forming polyacrylamide polymer having a weight average molecular weight of 500-100,000 exhibit reduced film cracking, rapid drying, excellent image definition, are storage stable and have excellent decap properties and, when used in combination with a differently colored ink, result in reduced bleed in multi-colored printed elements.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: January 27, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David Herbert Donovan, Gregg Allen Lane, Chaucer C. Tang