Patents by Inventor James E. Mark

James E. Mark 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).

  • High performance biodegradable materials from oriented starch derivatives
    Patent number: 6218532
    Abstract: The present invention involves the synthesis of a series of amylose (starch) derivatives with various degrees of substitution and amylose/amylopectin ratios. These chains are chemically crosslinked and then mechanically deformed (stretched) to produce a biodegradable and mechanically superior material. Specifically, the process consists of chemically modifying starch into starch derivatives such as starch ethers, starch esters and starch carbamates. The polymers have a percentage degree of substitution of from about 35% to about 95% (degree of substitution is from about 1.05 to about 2.85) and preferably have a percentage degree of substitution of from about 65% to about 90% (degree of substitution is from about 1.95 to about 2.70). The starch derivatives are crosslinked to obtain crosslinked chains and processed into sheets, films, fibers, threads or other articles as known in the art.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: April 17, 2001
    Assignee: The University of Cincinnati
    Inventors: James E. Mark, Brooke Zhao Peterson, Burak Eman, Ivet Bahar, Andrzej Kloczkowski
  • Method for production of coated electrode
    Patent number: 4894253
    Abstract: An electrode having a coating comprising at least two layers, at least one layer being a polymer network cross-linked by high energy radiation or chemically, and a method of producing such an electrode. The electrode is useful as a sensor for molecular oxygen, or as an ampermometric sensor with an enzyme or antibody immobilized in the cross-linked polymer layer.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: January 16, 1990
    Assignee: University of Cincinnati
    Inventors: William R. Heineman, James E. Mark, Emory S. Decastro, Christos Galiatsatos
  • High performance biodegradable materials from oriented starch derivatives
    Patent number: RE38773
    Abstract: The present invention involves the synthesis of a series of amylose (starch) derivatives with various degrees of substitution and amylose/amylopectin ratios. These chains are chemically crosslinked and then mechanically deformed (stretched) to produce a biodegradable and mechanically superior material. Specifically, the process consists of chemically modifying starch into starch derivatives such as starch ethers, starch esters and starch carbamates. The polymers have a percentage degree of substitution of from about 35% to about 95% (degree of substitution is from about 1.05 to about 2.85) and preferably have a percentage degree of substitution of from about 65% to about 90% (degree of substitution is from about 1.95 to about 2.70). The starch derivatives are crosslinked to obtain crosslinked chains and processed into sheets, films, fibers, threads or other articles as known in the art.
    Type: Grant
    Filed: May 2, 2002
    Date of Patent: August 9, 2005
    Assignee: The University of Cincinnati
    Inventors: James E. Mark, Brooke Zhao Peterson, Burak Eman, Ivet Bahar, Andrzej Kloczkowski