Patents Represented by Attorney W. G. Ewert

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  • Hydroxyl-terminated polyepichlorohydrin polymers
    Patent number: 4879419
    Abstract: Hydroxyl terminated polyepichlorohydrin having a polydispersity of less than 1.2 and a molecular weight of at least 2000, and method of preparation using stannic chloride and strong carboxylic acid co-catalysts.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: November 7, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Birger Johannessen