Patents by Inventor Johannes Spaans

Johannes Spaans 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).

  • Vessel provided with a device for removing and/or installing a sub-structure of a drilling or production platform
    Patent number: 7111686
    Abstract: The invention relates to a vessel (1) provided with a deck (2) and with a device (3) for removing and/or installing a sub-structure (4) of a drilling or production platform, wherein said device comprises a supporting structure (5) which is capable of tilting movement in a direction transversely to an edge (6) of the deck (2), hoisting means (7) connected to said supporting structure for hoisting said sub-structure, and supporting means for supporting said sub-structure mainly during tilting movement of said supporting structure, wherein said supporting means are provided separately from the supporting structure and capable of tilting movement with respect to the edge of the deck.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: September 26, 2006
    Assignee: Excalibur Engineering B.V.
    Inventors: Frans Ariën Den Hartogh, Jacob Johannes Spaan
  • vessel provided with a device for removing and/or installing a sub-structure of a driling or production platform
    Publication number: 20040089453
    Abstract: The invention relates to a vessel (1) provided with a deck (2) and with a device (3) for removing and/or installing a sub-structure (4) of a drilling or production platform, wherein said device comprises a supporting structure (5) which is capable of tilting movement in a direction transversely to an edge (6) of the deck (2), hoisting means (7) connected to said supporting structure for hoisting said sub-structure, and supporting means for supporting said sub-structure mainly during tilting movement of said supporting structure, wherein said supporting means are provided separately from the supporting structure and capable of tilting movement with respect to the edge of the deck.
    Type: Application
    Filed: July 28, 2003
    Publication date: May 13, 2004
    Inventors: Frans Arien Den Hartogh, Jacob Johannes Spaan
  • Process for the preparation of optically active 2-phenoxy propionic acids and herbicidal preparations containing such acids
    Patent number: 4310689
    Abstract: A process is provided for making D-2-phenoxy propionic acid by condensing in water an alkali metal salt of 2-chloropropionic acid which is dextro-rotatory in water with an alkali metal phenoxide of a halogen or methyl substituted phenol. The overall amount of water in the condensation mixture is not more than about 8 moles water per mole of said alkali metal salt of 2-chloropropionic acid in order to selectively produce the dextro-rotatory optical isomer.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: January 12, 1982
    Assignee: Akzo N.V.
    Inventors: Willem Eveleens, Johannes Spaans, Hendrik G. Wissink