Patents Represented by Attorney Stephen D. Murphy

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  • Process for the control of carboxyl end groups in fiber-forming polyesters
    Patent number: 4016142
    Abstract: In the preparation of a fiber-forming polyester, the number of free carboxyl end groups present in the polymer may be reduced by adding to the polymerized polyester a glycidyl ether which reacts with the carboxyl end groups present to form free hydroxyl end groups.
    Type: Grant
    Filed: November 9, 1966
    Date of Patent: April 5, 1977
    Assignee: Millhaven Fibers, Ltd.
    Inventors: William Alexander, Alfredo Guillermo Causa, James Girvan Fraser