Patents Represented by Law Firm Oblon, Spivak, McClelland, Meier & Neustadt, P.C.
  • Hydroxysilyl-terminated polyoxyethylene compound, quaternary-salt-terminated block copolymer, and percutaneous absorption-promoting agent
    Patent number: 5624680
    Abstract: A hydrosilyl-terminated polyoxyethylene compound of the general formula (I), a quaternary-salt-terminated polyoxyethylene/polyorganosiloxane block copolymer of the general formula (II) derived from the above compound, and a percutaneous drug absorption promoter comprising the above copolymer (II). The copolymer is usable as a percutaneous absorption promoter having a good drug absorption promoting effect and being effective for various drugs.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: April 29, 1997
    Assignee: Sagami Chemical Research Center
    Inventors: Yu Nagase, Takao Aoyagi, Tomoko Akimoto