Patents by Inventor Tom Melbye

Tom Melbye 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).

  • Cementitious compositions for layered applications
    Patent number: 5674929
    Abstract: The interlayer adhesion and final strength of cementitious compositions which are applied in consecutive layers are improved by the incorporation in the compositions of an admixture which is a combination of a waterproofing agent and a water retention agent. The invention is particularly applicable to sprayed concrete.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: October 7, 1997
    Assignee: MBT Holding AG
    Inventor: Tom Melbye
  • Workable cementitious compositions
    Patent number: 5609681
    Abstract: A process for modifying the slump of a concrete or mortar by the addition at different times of a water-soluble poly(alkylene oxide) and a .beta.-naphthalene sulphonate-formaldehyde condensate, a plasticizer or superplasticizer which is selected from lignosulphonates, melamine sulphonate formaldehyde condensates, carboxylates and selected styrene-maleic anhydride copolymers. The poly(alkylene oxide) is preferably partially replaced by a (hydroxy)alkyl cellulose. The process is advantageously used in shotcreting.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 11, 1997
    Assignee: Sandoz Ltd.
    Inventors: Josef F. Drs, Tom Melbye, Odd M. Tjugum, Salvatore Valenti
  • Workable cementitious compositions
    Patent number: 5494516
    Abstract: A process for modifying the slump of a concrete or mortar by the addition at different times of a water-soluble poly(alkylene oxide) and a .beta.-naphthalene sulphonate-formaldehyde condensate, a plasticizer or superplasticizer which is selected from lignosulphonates, melamine sulphonate formaldehyde condensates, carboxylates and selected styrene-maleic anhydride copolymers. The poly(alkylene oxide) is preferably partially replaced by a (hydroxy)alkyl cellulose. The process is advantageously used in shotcreting.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: February 27, 1996
    Assignee: Sandoz Ltd.
    Inventors: Josef F. Drs, Tom Melbye, Odd M. Tjugum, Salvatore Valenti