Patents by Inventor Kenneth A. Blake

Kenneth A. Blake 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 and device for the determination of polymeric biguanides in aqueous fluids
    Patent number: 5498547
    Abstract: A test method and device is described for determining biguanides in aqueous fluids such as swimming pool water which involve contacting the fluid with a matrix incorporating a pH sensitive indicator material which exhibits the biguanide error effect. A buffer is advantageously used to maintain the test system within a defined constant pH range to eliminate the effect of pH changes on the test system.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: March 12, 1996
    Assignee: Environmental Test Systems, Inc.
    Inventors: Kenneth A. Blake, Chauncey O. Rupe, Carol A. Terry
  • Multilayer test device having fusion bonding attachment layer
    Patent number: 5330715
    Abstract: A unitized multilayer dry reagent analytical chemistry test structure and device and method of fabricating such device is described. The device includes two or more contiguous layers of absorbent or porous paper or polymeric material, at least one of which is incorporated with a test reagent composition, the layers attached to each other with intermediate porous attachment layers by fusion bonding. When the device is contacted with the fluid being tested the attachment layers allow the free flow of such fluid from one layer to the next.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: July 19, 1994
    Assignee: Environmental Test Systems, Inc.
    Inventors: Kenneth A. Blake, James E. Christner, Leonard J. Lucchese, II