Patents by Inventor Kjell A. Rorvik

Kjell A. Rorvik 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).

  • Feed and feed additive for marine species and crawfish and method for the production of same
    Patent number: 5262184
    Abstract: The invention relates to a new feed, feed additive and method for production of feed for marine species. Trimethylamine oxide (TMAO) or deriviatives of same are formed to be powerful iron inhibitors when added to a conventional feed composition.When used alone or in diluted dry or liquid form the amount needed to obtain an optional synergetic effect between iron and omega-3 fatty acids in the feed can be calculated according to a defined equation.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: November 16, 1993
    Assignee: Norsk Hydro a.s
    Inventors: Kjell A. Rorvik, Anders Skrede
  • Fish feed
    Patent number: 5132120
    Abstract: Fish feed and method for obtaining prophylactic effect on diseases where the bio-available Fe is reduced below 150 mg/kg and where there is established a synergetic effect when the Fe is used in combination with EPA/DHA or other n-3 poly-unsaturated fatty acids or derviatives in amounts up to 8.5% or higher.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: July 21, 1992
    Assignee: Norsk Hydro A.S.
    Inventors: Ragnar Salte, Magny Thomassen, Kjell A. Rorvik