Patents by Inventor Dirk Schweitzer

Dirk Schweitzer 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).

  • Publication number: 20250289831
    Abstract: The present disclosure relates generally to compositions comprising ligand-AI-hydride complexes, and methods to make said and related compositions. In particular, the present disclosure provides for a composition comprising a ligand-AI-hydride, wherein the composition has a purity greater than 99%.
    Type: Application
    Filed: April 27, 2023
    Publication date: September 18, 2025
    Inventors: Dirk SCHWEITZER, Matthew Damien STEPHENS
  • Patent number: 9850192
    Abstract: Processes and methods for making biobased acrylic acid products including acrylic acid, acrylic acid oligomers, acrylic acid esters, acrylic acid polymers and articles from renewable carbon resources are described herein.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: December 26, 2017
    Assignee: CJ Cheiljedang Corporation
    Inventors: Stephen Harris, Kevin A. Sparks, Oliver P. Peoples, Yossef Shabtai, Christopher W. J. McChalicher, Johan van Walsem, Christopher Mirley, Dirk Schweitzer
  • Publication number: 20150376152
    Abstract: Processes and methods for making ultra-pure (>99.50% by weight), biobased crotonic acid, gamma-butyro lactone, acrylic acid and delta-valerolactone from renewable carbon resources are described herein.
    Type: Application
    Filed: February 12, 2014
    Publication date: December 31, 2015
    Applicant: Metabolix, Inc.
    Inventors: Derek Samuelson, Oliver P. Peoples, Yossef Shabtai, Johan Van Walsem, Dirk Schweitzer, Harvey H. Morgan, III, Kevin A. Sparks
  • Patent number: 9073867
    Abstract: Provided herein are processes for preparing caprolactam from a starting material such as one or more of the cis,cis-, cis,trans- and trans,trans-double-bond isomers of muconamide, muconic acid ester, or muconic acid. The starting material, intermediates, and caprolactam prepared therefrom can contain carbon atoms derived from biomass containing detectable 14C content determined according to ASTM D6866 and optionally containing a 14C content up to 0.0000000001% (one part per trillion). Caprolactam so prepared can be used to make various polyamides.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: July 7, 2015
    Assignee: Amyris, Inc.
    Inventors: Laetitia Coudray, Vu Bui, John W. Frost, Dirk Schweitzer
  • Publication number: 20150183708
    Abstract: Processes and methods for making biobased acrylic acid products including acrylic acid, acrylic acid oligomers, acrylic acid esters, acrylic acid polymers and articles from renewable carbon resources are described herein.
    Type: Application
    Filed: June 7, 2013
    Publication date: July 2, 2015
    Inventors: Stephen Harris, Kevin A. Sparks, Oliver P. Peoples, Yossef Shabtai, Christopher W.J. McChalicher, Johan van Walsem, Christopher Mirley, Dirk Schweitzer
  • Patent number: 8809583
    Abstract: A method for producing cis,trans- and trans,trans-isomers of muconate by providing cis,cis -muconate produced from a renewable carbon source through biocatalytic conversion; isomerizing cis,cis-muconate to cis,trans-muconate under reaction conditions in which substantially all of the cis,cis-muconate is isomerized to cis,trans -muconate; separating the cis,trans-muconate; and crystallizing the cis,trans-muconate. The cis,trans-isomer can be further isomerized to the trans,trans-isomer. In one example, the method includes culturing recombinant cells that express 3-dehydroshikimate dehydratase, protocatechuate decarboxylase and catechol 1,2-dioxygenase in a medium comprising the renewable carbon source and under conditions in which the renewable carbon source is converted to 3-dehydroshikimate by enzymes in the common pathway of aromatic amino acid biosynthesis of the cell, and the 3-dehydroshikimate is biocatalytically converted to cis,cis-muconate.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: August 19, 2014
    Assignee: Amyris, Inc.
    Inventors: Vu Bui, Man Kit Lau, Doug MacRae, Dirk Schweitzer
  • Patent number: 8426639
    Abstract: The present invention relates to the isomerization of cis,cis and/or cis,trans muconic acid or esters thereof to trans,trans muconic acid or esters thereof and to the esterification of such muconic acids.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: April 23, 2013
    Assignee: Amyris, Inc.
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui
  • Patent number: 8415496
    Abstract: The present invention relates to polyesters prepared from benzene, cyclohexene and cyclohexane compounds having carboxylic acid groups at the 1 and 4, and optionally the 2, positions, such as terephthalic acid or dimethyl terephthalates, and alkylene glycols, such ethylene glycol or 1,4-butane diol. The invention also relates to processes for preparing such polyesters. The invention also relates to such polyesters derived from starting materials derived from renewable resources.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: April 9, 2013
    Assignee: Amyris, Inc.
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Edward Paschke, Douglas A. Wicks
  • Publication number: 20130085255
    Abstract: Provided herein are processes for preparing caprolactam from a starting material such as one or more of the cis,cis-, cis,trans- and trans,trans-double-bond isomers of muconamide, muconic acid ester, or muconic acid. The starting material, intermediates, and caprolactam prepared therefrom can contain carbon atoms derived from biomass containing detectable 14C content determined according to ASTM D6866 and optionally containing a 14C content up to 0.0000000001% (one part per trillion). Caprolactam so prepared can be used to make various polyamides.
    Type: Application
    Filed: April 9, 2012
    Publication date: April 4, 2013
    Applicant: Amyris, Inc.
    Inventors: Laetitia Coudray, Vu Bui, John W. Frost, Dirk Schweitzer
  • Patent number: 8367858
    Abstract: The present invention relates to novel substituted and unsubstituted terephthalic acid and carboxylate derivatives and products prepared therefrom having a significant renewable content. The invention also relates to processes for preparing substituted and unsubstituted terephthalic and carboxylate derivatives thereof wherein a portion of the starting materials utilized is derived from renewable resources. The invention also relates to novel cyclohexene based intermediates prepared in these processes and to conversion of these intermediates to substituted and unsubstituted cyclohexane-1,4-dicarboxylates and carboxylate derivatives thereof and novel forms of the resulting products having renewable content. The invention also relates to products prepared from substituted and unsubstituted terephthalic acid and carboxylate derivatives thereof derived from starting materials derived from renewable resources.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 5, 2013
    Assignee: Amyris, Inc.
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Douglas A. Wicks
  • Patent number: 8367859
    Abstract: The present invention relates to cyclohexanes having carboxylate derivatives at the 1 and 4, and optionally the 2, position. The invention also relates to processes for preparing such compounds wherein a portion of the starting materials utililzed is derived from renewable resources.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: February 5, 2013
    Assignee: Amyris, Inc.
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Douglas A. Wicks
  • Publication number: 20130030215
    Abstract: A method for producing cis,trans- and trans,trans-isomers of muconate by providing cis,cis-muconate produced from a renewable carbon source through biocatalytic conversion; isomerizing cis,cis-muconate to cis,trans-muconate under reaction conditions in which substantially all of the cis,cis-muconate is isomerized to cis,trans-muconate; separating the cis,trans-muconate; and crystallizing the cis,trans-muconate. The cis,trans-isomer can be further isomerized to the trans,trans-isomer. In one example, the method includes culturing recombinant cells that express 3-dehydroshikimate dehydratase, protocatechuate decarboxylase and catechol 1,2-dioxygenase in a medium comprising the renewable carbon source and under conditions in which the renewable carbon source is converted to 3-dehydroshikimate by enzymes in the common pathway of aromatic amino acid biosynthesis of the cell, and the 3-dehydroshikimate is biocatalytically converted to cis,cis-muconate.
    Type: Application
    Filed: January 10, 2011
    Publication date: January 31, 2013
    Applicant: Amyris, Inc.
    Inventors: Vu Bui, Man Kit Lau, Doug MacRae, Dirk Schweitzer
  • Publication number: 20110288310
    Abstract: The present invention relates to cyclohexanes having carboxylate derivatives at the 1 and 4, and optionally the 2, position. The invention also relates to processes for preparing such compounds wherein a portion of the starting materials utililzed is derived from renewable resources.
    Type: Application
    Filed: June 16, 2010
    Publication date: November 24, 2011
    Applicant: Draths Corporation
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Douglas A. Wicks
  • Publication number: 20110288311
    Abstract: The present invention relates to novel substituted and unsubstituted terephthalic acid and carboxylate derivatives and products prepared therefrom having a significant renewable content. The invention also relates to processes for preparing substituted and unsubstituted terephthalic and carboxylate derivatives thereof wherein a portion of the starting materials utilized is derived from renewable resources. The invention also relates to novel cyclohexene based intermediates prepared in these processes and to conversion of these intermediates to substituted and unsubstituted cyclohexane-1,4-dicarboxylates and carboxylate derivatives thereof and novel forms of the resulting products having renewable content. The invention also relates to products prepared from substituted and unsubstituted terephthalic acid and carboxylate derivatives thereof derived from starting materials derived from renewable resources.
    Type: Application
    Filed: June 16, 2010
    Publication date: November 24, 2011
    Applicant: Draths Corporation
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Douglas A. Wicks
  • Publication number: 20110288263
    Abstract: The present invention relates to polyesters prepared from benzene, cyclohexene and cyclohexane compounds having carboxylic acid groups at the 1 and 4, and optionally the 2, positions, such as terephthalic acid or dimethyl terephthalates, and alkylene glycols, such ethylene glycol or 1,4-butane diol. The invention also relates to processes for preparing such polyesters. The invention also relates to such polyesters derived from starting materials derived from renewable resources.
    Type: Application
    Filed: June 16, 2010
    Publication date: November 24, 2011
    Applicant: Draths Corporation
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Edward Paschke, Douglas A. Wicks
  • Publication number: 20110282078
    Abstract: The present invention relates to cyclohexenes having carboxylate derivatives at the 1 and 4, and optionally the 2, position. The invention also relates to processes for preparing such compounds wherein a portion of the starting materials utilized is derived from renewable resources.
    Type: Application
    Filed: June 16, 2010
    Publication date: November 17, 2011
    Applicant: Draths Corporation
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui, Douglas A. Wicks
  • Publication number: 20100314243
    Abstract: The present invention relates to the isomerization of cis,cis and/or cis,trans muconic acid or esters thereof to trans,trans muconic acid or esters thereof and to the esterification of such muconic acids.
    Type: Application
    Filed: June 16, 2010
    Publication date: December 16, 2010
    Applicant: Draths Corporation
    Inventors: John W. Frost, Adeline Miermont, Dirk Schweitzer, Vu Bui