Patents by Inventor Jade Jocelyn Afriye Osei Tutu

Jade Jocelyn Afriye Osei Tutu 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 production of optically-active esters of lactic acid and lactyllactic acid
    Patent number: 9045783
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the lactide mixture with an aliphatic alcohol and/or an alkoxide to produce a mixture of R,R- and S,S-aliphatic ester of lactyllactic acid, subsequently contacting the mixture of R,R- and S,S-aliphatic ester of lactyllactic acid with an enzyme to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer, and recovering the product. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 2, 2015
    Assignee: Plaxica Limited
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei-Tutu, Stephen Alexander Calder Smith
  • Process for the production of optically-active esters of lactic acid and lactyllactic acid
    Patent number: 9045781
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the mixture with an aliphatic alcohol and an enzyme in the presence of a ketone solvent to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer, and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 2, 2015
    Assignee: Plaxica Limited
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei-Tutu, Stephen Alexander Calder Smith
  • Process for the production of optically-active esters of lactic acid and lactyllactic acid
    Patent number: 9045782
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the mixture with an aliphatic alcohol and an enzyme to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer; separating the mixture from the enzyme, and recycling the enzyme to the process; and separating the aliphatic ester of lactic acid from the aliphatic ester of lactyl-lactic acid by fractional distillation. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 2, 2015
    Assignee: Plaxica Limited
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei-Tutu, Stephen Alexander Calder Smith
  • Separation Process
    Publication number: 20140342413
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the lactide mixture with an aliphatic alcohol and/or an alkoxide to produce a mixture of R,R- and S,S-aliphatic ester of lactyllactic acid, subsequently contacting the mixture of R,R- and S,S-aliphatic ester of lactyllactic acid with an enzyme to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer, and recovering the product. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Application
    Filed: July 16, 2012
    Publication date: November 20, 2014
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei-Tutu, Stephen Alexander Calder Smith
  • Separation Process
    Publication number: 20140147898
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the mixture with an aliphatic alcohol and an enzyme to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer; separating the mixture from the enzyme, and recycling the enzyme to the process; and separating the aliphatic ester of lactic acid from the aliphatic ester of lactyl-lactic acid by fractional distillation. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Application
    Filed: July 16, 2012
    Publication date: May 29, 2014
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei-Tutu, Stephen Alexander Calder Smith
  • Separation Process
    Publication number: 20140141475
    Abstract: A process for treating a mixture of R,R- and S,S-lactide is provided. The process involves contacting the mixture with an aliphatic alcohol and an enzyme in the presence of a ketone solvent to produce a mixture comprising aliphatic ester of lactic acid corresponding to one lactide enantiomer, and the aliphatic ester of lactyllactic acid corresponding to the other lactide enantiomer. Also provided are processes for the production of S-lactic acid, S,S-lactide, poly-S-lactic acid, R-lactic acid, R,R-lactide, poly-R-lactic acid and stereocomplex polylactic acid.
    Type: Application
    Filed: August 21, 2012
    Publication date: May 22, 2014
    Applicant: Plaxica Limited
    Inventors: Edward Leslie Marshall, Jade Jocelyn Afriye Osei Tutu, Stephen Alexander Calder Smith