Patents by Inventor Jan Maat

Jan Maat 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).

  • Patent number: 6586209
    Abstract: An isolated DNA with a nucleotide sequence encoding a ripening form of a xylanase fungal origin having bread improving activity. Cells are transformed with this DNA and used to produce the ripening form of xylanase which itself is suitable for use in flour and dough.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: July 1, 2003
    Assignee: Quest International, B.V.
    Inventors: Robert F. M. van Gorcom, Johanna G. M. Hessing, Jan Maat, Martinus Roza, Johannes Maria A. Verbakel
  • Patent number: 5741672
    Abstract: The structural genes and their regulatory DNA sequences of an alcohol oxidase (MOX) and a dihydroxyacetone synthase (DHAS) of Hansenula polymorpha have been isolated and the nucleotide sequences determined. The invention relates to the use of the MOX gene, as well as the use of the regulatory DNA sequences of MOX and/or DAS in combination with the MOX gene, optionally after modification thereof, or other oxidase genes, or other genes, to produce engineered microorganisms, 0in particular yeasts. Said engineered microorganisms can produce oxidases or other enzymes in yields that allow industrial application on a large scale. Moreover, said engineered microorganisms can produce oxidases having improved properties with respect to their application in oxidation reactions and/or in bleaching and detergent products.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 21, 1998
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Adrianus M. Ledeboer, Jan Maat, Cornelis T. Verrips, Christiaan Visser, Zbigniew A. Janowicz, Cornelis P. Hollenberg
  • Patent number: 5683909
    Abstract: The claimed invention is drawn to a recombinant plasmid which can replicate in Bacillus subtilis, Escherichia coli, and lactic acid Streptococcus bacteria comprising the replication of origin from Streptococcus cremoris plasmid pWV01 as its origin of replication, in addition to coding marker genes and genes of interest which code for improved fermenting properties.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: November 4, 1997
    Assignee: Van Den Bergh Foods Company, Division of Conopco, Inc.
    Inventors: Jan Kok, Jan Maat, Josephus Mauritius van der Vossen, Gerard Venema
  • Patent number: 5529926
    Abstract: The invention relates to recombinant DNA technology for the production of an enzyme having sulfhydryl oxidase ("SOX") activity. This SOX-enzyme can be used where the oxidation of free sulfhydryl groups (thio compounds) to the corresponding disulfides is desirable. SOX enzyme may be used for treatment of bakery products or for removal of off-flavour from milk or beer.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: June 25, 1996
    Assignee: Unilever Patent Holdings BV
    Inventors: Jan Maat, Wouter Musters, Hein Stam, Peter J. Schaap, Peter J. van de Vonderwoort, Jacob Visser, Johannes M. Verbakel
  • Patent number: 5240838
    Abstract: The structural genes and their regulatory DNA sequences of an alcohol oxidase (MOX) and a dihydroxyacetone synthase (DHAS) of Hansenula polymorpha have been isolated and the nucleotide sequences determined. The invention relates to the use of the MOX gene, as well as the use of the regulatory DNA sequences of MOX and/or DAS in combination with the MOX gene, optionally after modification thereof, or other oxidase genes, or other genes, to produce engineered microorganisms, in particular yeasts. Said engineered microorganisms can produce oxidases or other enzymes in yields that allow industrial application on a large scale. Moreover, said engineered microorganisms can produce oxidases having improved properties with respect to their application in oxidation reactions and/or in bleaching and detergent products.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: August 31, 1993
    Assignee: Internationale Otrool Maatschappij "Octropa" B.V.
    Inventors: Adrianus M. Ledeboer, Jan Maat, Cornelis T. Verrips, Christiaan Visser, Zbigniew A. Janowicz, Cornelis P. Hollenberg
  • Patent number: 5133893
    Abstract: The invention relates to a detergent composition comprising lipases. By inclusion of a certain immunologically defined class of lipases in a detergent composition which comprises as detergent-active material solely an anionic synthetic detergent, and as builder a water-soluble inorganic or organic builder salt, an improved overall detergency is obtained. The builder salt is typically sodium tripolyphosphate or sodium carbonate, and the lipase is typically obtained from certain Pseudomonas or Chromobacter strains.
    Type: Grant
    Filed: July 2, 1991
    Date of Patent: July 28, 1992
    Assignee: Lever Brothers Company
    Inventors: David Thom, Ton Swarthoff, Jan Maat
  • Patent number: 5108765
    Abstract: A composition is disclosed which comprises cellulase, xylanase, peroxidase, and optionally an oxidase. The composition may be incorporated in flour as an additive to dough for bread or other baked dough products such as puff pastry. Flour compositions comprising a bread improver composition of cellulase, peroxidase and optionally an oxidase, and process for improving baked goods by using same are also shown.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: April 28, 1992
    Assignee: Van den Bergh Foods Co.
    Inventors: Jan Maat, Martinus Roza
  • Patent number: 4966842
    Abstract: The invention relates to structural genes consisting of DNA sequences encoding non-processed and partly processed thaumatin, to the various allelic forms of said non-processed thaumatin and to recombinant DNA's and plasmids comprising said structural genes coding for the various allelic forms of preprothaumatin, and naturally and/or artificially modified preprothaumatin in various stages of its natural processing, and to the use of said recombinant plasmids to transform microorganisms, particularly bacteria in which said genes are expressed.
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: October 30, 1990
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Cornelis T. Verrips, Jan Maat, Luppo Edens, Adrianus M. Ledeboer
  • Patent number: 4891316
    Abstract: The invention relates to DNA sequences encoding the various allelic forms of mature thaumatin, and cloning vehicles comprising said DNA sequences and their use in transforming microorganisms.
    Type: Grant
    Filed: June 7, 1985
    Date of Patent: January 2, 1990
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Cornelis T. Verrips, Adrianus M. Ledeboer, Luppo Edens, Robert Klok, Jan Maat
  • Patent number: 4873016
    Abstract: The invention relates to a detergent composition comprising lipases. By inclusion of a certain, immunologically defined class of lipases in a detergent composition which comprises a mixture of an anionic and a nonionic detergent, an improved overall detergency is obtained. Typical suitable lipases are obtained from certain Pseudomonas and Chromobacter strains.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: October 10, 1989
    Assignee: Lever Brothers Company
    Inventors: David Thom, Ton Swarthoff, Jan Maat
  • Patent number: 4771000
    Abstract: The invention relates to structural genes comprising encoding non-processed and partly processed thaumatin, to the various allelic forms of said non-processed thaumatin and to recombinant DNA's and plasmids comprising said structural genes coding for the various allelic forms of preprothaumatin, and naturally and/or artifically modified preprothaumatin in various stages of its natural processing, and to the use of said recombinant plasmids to transform microorganisms, particularly bacteria in which said genes are expressed.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: September 13, 1988
    Assignee: Internationale Octrooi Maatschappij Octropa B.V.
    Inventors: Cornelis T. Verrips, Jan Maat, Luppo Edens, Adrianus M. Ledeboer
  • Patent number: 4707291
    Abstract: The invention relates to a detergent composition comprising lipases. By inclusion of a certain, immunologically defined class of lipases in a detergent composition which comprises a mixture of an anionic and a nonionic detergent, an improved overall detergency is obtained. Typical suitable lipases are obtained from certain Pseudomonas and Chromobacter strains.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: November 17, 1987
    Assignee: Lever Brothers Company
    Inventors: David Thom, Ton Swarthoff, Jan Maat