Patents by Inventor Leonard A. Spicer

Leonard A. Spicer 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).

  • Polyvalent Immunogen
    Publication number: 20080181906
    Abstract: The present invention relates, generally, to a polyvalent immunogen and, more particularly, to a method of inducing neutralizing antibodies against HIV and to a polyvalent immunogen suitable for use in such a method.
    Type: Application
    Filed: May 19, 2004
    Publication date: July 31, 2008
    Inventors: Barton Haynes, Leonard Spicer
  • Planographic printing plate for dry printing
    Patent number: 4170687
    Abstract: Planographic printing plates for use without fountain solution, and especially suitable for imaging with an electrophotographic toner, have a surface containing a fluorinated polyurethane. In use only the image areas accept ink.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: October 9, 1979
    Assignee: Gestetner Limited
    Inventors: Leonard A. Spicer, Derek J. McGee, Ian H. Elson
  • Ink for dry planographic printing
    Patent number: 4148767
    Abstract: The invention provides a novel ink for dry planographic printing. The new ink is based on a vehicle containing the reaction product of an oil-modified alkyd resin, a rosin-modified phenolic resin, and a diisocyanate and also a high viscosity silicone oil. The new ink can be used with planographic plates having an oleophobic surface and does not adhere to the non-image areas.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: April 10, 1979
    Assignee: Gestetner Limited
    Inventors: Leonard A. Spicer, Derek J. McGee