Patents by Inventor Changlin Chen

Changlin Chen 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: 20140193864
    Abstract: This document describes biochemical pathways for producing one or more of pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine and 1,7-heptanediol by forming one or two terminal functional groups, comprised of carboxyl, amine or hydroxyl groups, in a C7 aliphatic backbone substrate produced from succinate semialdehyde or pyruvate. These pathways, metabolic engineering and cultivation strategies described herein rely on the aldol condensation of succinate semialdehyde and pyruvate.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 10, 2014
    Applicant: INVISTA North America S.á r.l.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140193863
    Abstract: This document describes biochemical pathways for producing pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine or 1,7-heptanediol by forming one or two terminal functional groups, each comprised of carboxyl, amine or hydroxyl group, in a C7 aliphatic backbone substrate. These pathways, metabolic engineering and cultivation strategies described herein rely on the C1 elongation enzymes or homolog associated with coenzyme B biosynthesis.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 10, 2014
    Applicant: INVISTA North America S.á r.I.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140193865
    Abstract: This document describes biochemical pathways for producing pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine or 1,7-heptanediol by forming two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C7 aliphatic backbone substrate. These pathways, metabolic engineering and cultivation strategies described herein rely on the fatty acid synthesis pathway and oxidative cleavage of long chain acyl-[acp] intermediates by a monooxgenase (e.g., cytochrome P450) such as that encoded by BioI from microorganisms such as Bacillus subtillis.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 10, 2014
    Applicant: INVISTA North America S.á r.I.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140193862
    Abstract: This document describes biochemical pathways for producing pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine or 1,7-heptanediol by forming two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C7 aliphatic backbone substrate. These pathways, metabolic engineering and cultivation strategies described herein rely on the carbon chain elongation enzymes or homologs thereof associated with the cyclohexane carboxylate biosynthesis from Syntrophus aciditrophicus or 2-aminoadipate lysine biosynthesis.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 10, 2014
    Applicant: INVISTA North America S.á r.I.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140193861
    Abstract: This document describes biochemical pathways for producing pimelic acid, 7-aminoheptanoate, 7-hydroxyheptanoate, heptamethylenediamine, or 1,7-heptanediol by forming two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C7 aliphatic backbone substrate produced from chorismate or benzoate. These pathways, metabolic engineering and cultivation strategies described herein rely on the anaerobic benzoyl-CoA degradation pathway enzymes.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 10, 2014
    Applicant: INVISTA North America S.á.r.l.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140186904
    Abstract: This document describes biochemical pathways for producing pimelic acid, 7-aminoheptanoic acid, 7-hydroxyheptanoic acid, heptamethylenediamine or 1,7-heptanediol by forming two terminal functional groups, comprised of carboxyl, amine or hydroxyl group, in a C7 aliphatic backbone substrate. These pathways, metabolic engineering and cultivation strategies described herein rely on enzymes or homologs accepting methyl ester shielded dicarboxylic acid substrates.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Applicant: INVISTA North America S.á r.l.
    Inventors: Adriana Leonora Botes, Alex Van Eck Conradie, Changlin Chen, Paul S. Pearlman
  • Publication number: 20140141482
    Abstract: This document describes biochemical pathways for producing butadiene by forming two vinyl groups in a butadiene synthesis substrate. These pathways described herein rely on enzymes such as mevalonate diphosphate decarboxylase, isoprene synthase, and dehydratases for the final enzymatic step.
    Type: Application
    Filed: June 12, 2013
    Publication date: May 22, 2014
    Applicant: INVISTA North America S.á r.l.
    Inventors: Paul S. Pearlman, Changlin Chen, Adriana Leonora Botes, Alex Van Eck Conradie
  • Publication number: 20130224807
    Abstract: The invention relates to methods for enriching monomer content in a cycloalkane oxidation process mixed organic waste stream. In particular, the methods involve combining a biocatalyst with a mixed organic waste stream from a cycloalkane oxidation process, and enzymatically converting dimeric and/or oligomeric components of said waste stream into monomeric components. The methods may enrich the content of diacids, adipic acid, and/or other ?,?-difunctional C6 alkanes in the mixed organic waste stream. Additionally, the treated mixed organic waste streams may have improved burning efficiency.
    Type: Application
    Filed: June 15, 2012
    Publication date: August 29, 2013
    Applicant: INVISTA North America S.a r.l.
    Inventors: Paul S. Pearlman, Changlin Chen, Adriana L. Botes
  • Publication number: 20130210104
    Abstract: Disclosed are methods for producing butadiene from one or more of several diverse feedstocks including bioderived feedstocks, renewable feedstocks, petrochemical feedstocks and natural gas.
    Type: Application
    Filed: June 15, 2012
    Publication date: August 15, 2013
    Applicant: INVISTA North America S.a r.l.
    Inventors: Paul S. Pearlman, Changlin Chen, Adriana L. Botes
  • Publication number: 20130210090
    Abstract: Embodiments of the invention relate to the enzymatic conversion of bioderived feedstocks to commercially valuable chemicals. The enzymatic conversions of the embodiments of the invention offer the potential for lower cost routes to these value-added chemicals. Some of the chemicals that are useful include nylon intermediates such as caprolactam, adipic acid, 1,6-hexamethylene diamine; butanediols such as 1,4-butanediol, 1,3-butanediol, and 2,3-butanediol; butanols such as 1-butanol, and 2-butanol; succinic acid, butadiene, isoprene, and 3-hydroxypropanoic acid.
    Type: Application
    Filed: June 15, 2012
    Publication date: August 15, 2013
    Applicant: INVISTA North America S.a.r.l.
    Inventors: Paul S. PEARLMAN, Changlin CHEN, Adriana L. BOTES
  • Patent number: 6532253
    Abstract: In a spread spectrum system, the transmitter encodes and modulates a data stream by use of trellis-coded modulation. Trellis-coded modulation uses a convolutional coding scheme or a block code scheme along with a bandwidth-efficient signal constellation, such as QAM (quadrature amplitude modulation) or MPSK (M-ary phase-shift keying). Mapping of the data stream to the constellation signals can be implemented in a look-up table. At the receiver, the received data is despread and passed to a decoder for recovery of the original data stream. The decoder can be a Viterbi decoder if convolutional coding is used or a different decoding mechanism if block coding is adopted. This system achieves high coding gain without a decrease in processing gain, as well as providing increased flexibility in the choice of coding rates.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: March 11, 2003
    Assignee: IoWave, Inc.
    Inventor: Changlin Chen