Patents by Inventor David M. Trampe

David M. Trampe 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).

  • Method of preparing modified cellulose ether
    Patent number: 6933381
    Abstract: Process for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable catiion and/or anion membranes. The acids and bases recovered from the process can be recycled, thereby avoiding the need to provide for disposal of salts.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: August 23, 2005
    Inventors: Charles B. Mallon, John S. Vames, John I. Sarlis, Benito See, David M. Trampe, Rathin Datta
  • Method of preparing modified cellulose ether
    Publication number: 20030013871
    Abstract: Processes for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable cation and/or anion membranes. The acids and bases recovered from the processes can be recycled, thereby avoiding the need to provide for disposal of the salts.
    Type: Application
    Filed: February 2, 2001
    Publication date: January 16, 2003
    Inventors: Charles B. Mallon, John S. Vames, John I Sarlis, Benito See, David M. Trampe, Rathin Datta