Patents by Inventor Delman R. Asher

Delman R. Asher 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 preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer
    Patent number: 3960770
    Abstract: Activated, macroporous open-cell carbon foam which is particularly useful as a filter for cigarette smoke and the like, is prepared by contacting, at a temperature of at least about 25.degree.C a normally crystalline vinylidene chloride polymer in substantially open-cell, macroporous foam form with liquid ammonia until at least about 50 percent of theoretical Cl.sup.- is removed, then heating said foam to a temperature sufficient to remove residual ammonium chloride.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: June 1, 1976
    Assignee: The Dow Chemical Company
    Inventors: Charles F. Raley, Jr., Delman R. Asher