Patents Assigned to Boundary Technologies, Inc.
  • Electrically conductive anodized aluminum coatings
    Patent number: 6228241
    Abstract: A process for producing anodized aluminum with enhanced electrical conductivity, comprising anodic oxidation of aluminum alloy substrate, electrolytic deposition of a small amount of metal into the pores of the anodized aluminum, and electrolytic anodic deposition of an electrically conductive oxide, including manganese dioxide, into the pores containing the metal deposit; and the product produced by the process.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: May 8, 2001
    Assignee: Boundary Technologies, Inc.
    Inventors: Robert S. Alwitt, Yanming Liu
  • Electrolyte for an electrolytic capacitor
    Patent number: 5507966
    Abstract: An electrolyte for aluminum electrolytic capacitors comprises 2-methyl-1,3-propanediol, ethylene glycol, and an ammonium salt of a straight chain dicarboxylic acid or a branched chain di- or polycarboxylic acid. Electrolytic capacitors including this composition are useful for high voltage at relatively low temperatures.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: April 16, 1996
    Assignee: Boundary Technologies, Inc.
    Inventor: Yanming Liu
  • Electrolyte for electrolytic capacitor
    Patent number: 5496481
    Abstract: An electrolyte for aluminum electrolytic capacitors comprises a triakylamine having from 8 to 12 carbon atoms, a solvent and a carboxylic acid having at least 4 carbon atoms. The preferred solvent is a combination of butyrolactone with ethylene glycol and the preferred triakylamines are tripropylamine, tributylamine and N,N-diisopropylethylamine.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: March 5, 1996
    Assignee: Boundary Technologies, Inc.
    Inventor: Yanming Liu