Patents by Inventor Jeffrey C. Karr

Jeffrey C. Karr 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).

  • Preparation of bone cement compositions
    Patent number: 9180137
    Abstract: A method for the preparation of injectable ready-to-use paste bone cement compositions by mixing a dry inorganic bone cement powder comprising a particulate calcium sulfate hemihydrate capable of hardening in vivo by hydration of the calcium sulfate hemihydrate forming calcium sulfate dihydrate, an aqueous liquid and an additive that normally retards the setting process, said method comprising a) providing a bone cement powder comprising calcium sulfate hemihydrate, an accelerator for the hardening of the calcium sulfate hemihydrate by hydration, said accelerator being selected from the group consisting of saline and calcium sulfate dihydrate, and a powdered calcium phosphate component b) mixing the bone cement powder with the aqueous liquid for a period of time c) leaving the mixture for the time needed for allowing the hydration reaction of the calcium sulfate hemihydrate to proceed and allowing calcium sulfate dihydrate crystals to form and grow, and d) admixing the additive by means of a short-duration m
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: November 10, 2015
    Assignee: BONE SUPPORT AB
    Inventors: Veronica Sandell, Malin Nilsson, Eva Liden, Jeffrey C. Karr
  • PREPARATION OF BONE CEMENT COMPOSITIONS
    Publication number: 20120129761
    Abstract: A method for the preparation of injectable ready-to-use paste bone cement compositions by mixing a dry inorganic bone cement powder comprising a particulate calcium sulfate hemihydrate capable of hardening in vivo by hydration of the calcium sulfate hemihydrate forming calcium sulfate dihydrate, an aqueous liquid and an additive that normally retards the setting process, said method comprising a) providing a bone cement powder comprising calcium sulfate hemihydrate, an accelerator for the hardening of the calcium sulfate hemihydrate by hydration, said accelerator being selected from the group consisting of saline and calcium sulfate dihydrate, and a powdered calcium phosphate component b) mixing the bone cement powder with the aqueous liquid for a period of time c) leaving the mixture for the time needed for allowing the hydration reaction of the calcium sulfate hemihydrate to proceed and allowing calcium sulfate dihydrate crystals to form and grow, and d) admixing the additive by means of a short-duration m
    Type: Application
    Filed: February 8, 2011
    Publication date: May 24, 2012
    Inventors: Veronica Sandell, Malin Nilsson, Eva Liden, Jeffrey C. Karr