Patents by Inventor David Kranbuehl

David Kranbuehl 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).

  • Multi point method and apparatus for monitoring the aging and changes in corresponding tensile performance properties of a polymer
    Patent number: 9897586
    Abstract: The molecular weight distribution in a polymer sample can be used as a measure for when parts need to be replaced, and can be tracked over time to allow for predicting when parts need to be replaced and/or identifying the type of aging taking place in the polymer part. Molecular weight distribution determination has particular application in determining the replacement time and or aging parameters in polyamide (e.g., formed from 11-aminoundecanoic acid or formed from 12 aminododecanoic acid) polyvinyldiflouride, and polyethyelene pipe liners used in, for example, offshore oil and gas production and fuel transport operations.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: February 20, 2018
    Inventor: David Kranbuehl
  • Multi Point Method and Apparatus for monitoring the aging and changes in corresponding tensile performance properties of a polymer
    Publication number: 20160003796
    Abstract: The molecular weight distribution in a polymer sample can be used as a measure for when parts need to be replaced, and can be tracked over time to allow for predicting when parts need to be replaced and/or identifying the type of aging taking place in the polymer part. Molecular weight distribution determination has particular application in determining the replacement time and or aging parameters in polyamide (e.g., formed from 11-aminoundecanoic acid or formed from 12 aminododecanoic acid) polyvinyldiflouride, and polyethyelene pipe liners used in, for example, offshore oil and gas production and fuel transport operations.
    Type: Application
    Filed: June 4, 2014
    Publication date: January 7, 2016
    Inventor: David Kranbuehl
  • Method for making polymer composites containing graphene sheets
    Patent number: 9162896
    Abstract: In one embodiment, a method for producing a graphene-containing composition is provided, the method comprising: (i) mixing a graphene oxide with a medium to form a mixture; and (ii) heating the mixture to a temperature above about 40° C., whereby a graphene-containing composition is formed from the mixture. Composites of polymers with disperse functionalized graphene sheets and the applications thereof are also described.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 20, 2015
    Assignee: College of William and Mary
    Inventors: David Kranbuehl, Sarah Cotts, Hannes C. Schniepp, Minzhen Cai, Arthur Jaeton Glover
  • METHOD FOR MAKING POLYMER COMPOSITES CONTAINING GRAPHENE SHEETS
    Publication number: 20120068122
    Abstract: In one embodiment, a method for producing a graphene-containing composition is provided, the method comprising: (i) mixing a graphene oxide with a medium to form a mixture; and (ii) heating the mixture to a temperature above about 40° C., whereby a graphene-containing composition is formed from the mixture. Composites of polymers with disperse functionalized graphene sheets and the applications thereof are also described.
    Type: Application
    Filed: May 28, 2010
    Publication date: March 22, 2012
    Inventors: David Kranbuehl, Sarah Cotts, Hannes C. Schniepp, Minzhin Cai, Arthur Jaeton Glover
  • METHOD TO PREDICT THE END-POINT, REPLACEMENT TIME AND TO MONITOR CHANGES IN THAT TIME USING PRE AGED WITNESS COUPONS
    Publication number: 20070240528
    Abstract: A method involving the use and creation of pre-aged witness coupons which characterizes and monitors the rate and extent of chemical and physical aging of the polymer in the structure during use in the field is described.
    Type: Application
    Filed: April 17, 2006
    Publication date: October 18, 2007
    Inventor: David Kranbuehl
  • Method to predict the end-point, replacement time and to monitor changes in that time by using pre aged witness coupons
    Publication number: 20050247103
    Abstract: A method involving the use and creation of pre-aged witness coupons which characterizes and monitors the rate and extent of chemical and physical aging of the polymer in the structure during use in the field is described.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Inventor: David Kranbuehl