Patents by Inventor Børre Leif Knudsen

Børre Leif Knudsen 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).

  • Process for the reduction or elimination of hydrogen sulphide
    Patent number: 7078005
    Abstract: The invention provides a process for reducing the level of hydrogen sulphide in a liquid or gas by treatment of the liquid or gas with an H2S-scavenger product derivable by the reaction of a carbonyl group-containing compound with an alcohol, thiol, amide, thioamide, urea or thiourea. The carbonyl group-containing compound is preferably formaldehyde, and preferably the product is derivable by reaction of formaldehyde with an amine-free alcohol or urea selected from ethylene glycol, propylene glycol, glycerol, diethylene glycol, triethylene glycol, ethyl alcohol, n-butanol, a sugar, a low molecular weight polyvinyl alcohol, castor oil fatty acid and urea. More especially, the scavenger product is used with an amine, especially monoethanolamine.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 18, 2006
    Assignee: M-I L.L.C.
    Inventors: Hubern Larry Smith, Anne Faistrup Johnsen, Børre Leif Knudsen