Patents by Inventor William R. Krul

William R. Krul 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).

  • Vitro propagation of grape via leaf disk culture
    Patent number: 4931394
    Abstract: Angiosperm nodes are cultured to develop plantlets. The plantlets are exposed to photoperiods of light and dark. Leaf tissue removed from the plantlets when cultured produces at least 20% embryos.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: June 5, 1990
    Assignee: The Board of Governors for Higher Education, State of Rhode Island and Providence Plantations
    Inventor: William R. Krul
  • In vitro propagation of grape
    Patent number: 4714679
    Abstract: A process for controlling the development of somatic embryos for either a self-replicative or a vine development mode. Somatic embryogenesis is initiated by placing the embryo in a medium conducive for self-replication. When the embryos have grown to a first stage, they are transferred to a medium with cytokinin activity. They continue to grow until they have grown to a second stage at which time they are transferred to a medium without cytokinin activity until they have grown sufficiently and can be transferred to a non-liquid growth medium.
    Type: Grant
    Filed: June 27, 1985
    Date of Patent: December 22, 1987
    Assignee: The Board of Governors for Higher Education, State of Rhode Island and Providence Plantations
    Inventor: William R. Krul
  • In vitro propagation of grape
    Patent number: 4532733
    Abstract: A process for controlling the development of somatic embryos for either a self-replicative or a vine development mode. Somatic embryogenesis is initiated by placing the embryo in a medium conducive for self-replication. When the embryos have grown to a first stage, they are transferred to a medium with cytokinin activity. They continue to grow until they have grown to a second stage at which time they are transferred to a medium without cytokinin activity until they have grown sufficiently and can be transferred to a non-liquid growth medium.
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: August 6, 1985
    Assignees: The Board of Governors for Higher Education, State of Rhode Island, Providence Plantations
    Inventor: William R. Krul