Patents by Inventor Chad Henry Kamann

Chad Henry Kamann 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).

  • Polylactide fibers
    Patent number: 10208405
    Abstract: Polylactide fibers are made from a blend of polylactides. One of the polylactides has a ratio of R-lactic and S-lactic units from 8:92 to 92:8. The second polylactide has a ratio of the R-lactic and S-lactic units of ?97:3 or ?3:97. The ratio of the R-lactic units to S-lactic units in the blend is from 7:93 to 25:75 or from 75:25 to 93:7. The polylactide fiber contains at least 5 Joules of polylactide crystallites per gram of polylactide resin in the fiber.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: February 19, 2019
    Assignee: NatureWorks LLC
    Inventors: Chad Henry Kamann, Robert A. Green
  • Polylactide Fibers
    Publication number: 20160305045
    Abstract: Polylactide fibers are made from a blend of polylactides. One of the polylactides has a ratio of R-lactic and S-lactic units from 8:92 to 92:8. The second polylactide has a ratio of the R-lactic and S-lactic units of ?97:3 or ?3:97. The ratio of the R-lactic units to S-lactic units in the blend is from 7:93 to 25:75 or from 75:25 to 93:7. The polylactide fiber contains at least 5 Joules of polylactide crystallites per gram of polylactide resin in the fiber.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Inventors: Chad Henry Kamann, Robert A. Green
  • Polylactide fibers
    Patent number: 9404032
    Abstract: Polylactide fibers are made from a blend of polylactides. One of the polylactides has a ratio of R-lactic and S-lactic units from 8:92 to 92:8. The second polylactide has a ratio of the R-lactic and S-lactic units of >97:3 or <3:97. The ratio of the R-lactic units to S-lactic units in the blend is from 7:93 to 25:75 or from 75:25 to 93:7. The polylactide fiber contains at least 5 Joules of polylactide crystallites per gram of polylactide resin in the fiber.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: August 2, 2016
    Assignee: NatureWorks LLC
    Inventors: Chad Henry Kamann, Robert A. Green
  • Polylactide Fibers
    Publication number: 20140323365
    Abstract: Polylactide fibers are made from a blend of polylactides. One of the polylactides has a ratio of R-lactic and S-lactic units from 8:92 to 92:8. The second polylactide has a ratio of the R-lactic and S-lactic units of >97:3 or <3:97. The ratio of the R-lactic units to S-lactic units in the blend is from 7:93 to 25:75 or from 75:25 to 93:7. The polylactide fiber contains at least 5 Joules of polylactide crystallites per gram of polylactide resin in the fiber.
    Type: Application
    Filed: December 14, 2012
    Publication date: October 30, 2014
    Inventors: Chad Henry Kamann, Robert A. Green
  • Process of making conjugate fibers
    Patent number: 8377353
    Abstract: Conjugate fibers are prepared in which at least one segment is a mixture of a high-D PLA resin and a high-L PLA resin. These segments have crystallites having a crystalline melting temperature of at least 200° C. At least one other segment is a high-D PLA resin or a high-L PLA resin. The conjugate fibers may be, for example, bicomponent, multi-component, islands-in-the-sea or sheath-and-core types. Specialty fibers of various types can be made through further downstream processing of these conjugate fibers.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: February 19, 2013
    Assignee: NatureWorks LLC
    Inventors: Robert A. Green, Chad Henry Kamann, Jeffrey John Kolstad, Christopher M. Ryan
  • Methods for making polylactic acid stereocomplex fibers
    Patent number: 8182725
    Abstract: PLA stereocomplex fibers are made by separately melting a high-D PLA starting resin and a high-L starting resin, mixing the melts and spinning the molten mixture. Subsequent heat treatment introduces high-melting “stereocomplex” crystallinity into the fibers. The process can form fibers having a high content of “stereocomplex” crystallites that have a high melting temperature. As a result, the fibers have excellent thermal resistance. The process is also easily adaptable to commercial melt spinning operations.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: May 22, 2012
    Assignee: NatureWorks LLC
    Inventors: Robert A. Green, Chad Henry Kamann, Jeffrey John Kolstad
  • Methods for making polylactic acid stereocomplex fibers
    Publication number: 20100308494
    Abstract: PLA stereocomplex fibers are made by separately melting a high-D PLA starting resin and a high-L starting resin, mixing the melts and spinning the molten mixture. Subsequent heat treatment introduces high-melting “stereocomplex” crystallinity into the fibers. The process can form fibers having a high content of “stereocomplex” crystallites that have a high melting temperature. As a result, the fibers have excellent thermal resistance. The process is also easily adaptable to commercial melt spinning operations.
    Type: Application
    Filed: September 26, 2008
    Publication date: December 9, 2010
    Inventors: Robert A. Green, Chad Henry Kamann, Jeffrey John Kolstad
  • Polylactide stereocomplex conjugate fibers
    Publication number: 20100221471
    Abstract: Conjugate fibers are prepared in which at least one segment is a mixture of a high-D PLA resin and a high-L PLA resin. These segments have crystallites having a crystalline melting temperature of at least 200° C. At least one other segment is a high-D PLA resin or a high-L PLA resin. The conjugate fibers may be, for example, bicomponent, multi-component, islands-in-the-sea or sheath-and-core types. Specialty fibers of various types can be made through further downstream processing of these conjugate fibers.
    Type: Application
    Filed: September 26, 2008
    Publication date: September 2, 2010
    Inventors: Robert A. Green, Chad Henry Kamann, Jeffrey John Kolstad, Christopher M. Ryan