Patents by Inventor Alan Keith Penman

Alan Keith Penman 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).

  • Powder coating composition of semi-crystalline polyester and curing agent
    Patent number: 6184311
    Abstract: A thermosetting powder coating composition according to the present invention comprises as binder a co-reactable particulate mixture of a carboxylic acid-functional polyester component and a curing agent having groups reactive with carboxylic acid groups, characterized in that the carboxylic acid-functional component comprises a semi-crystalline polyester having an acid value of from 10 to 70 mg KOH/g and a hydroxy value of no more than 11 mg KOH/g. Generally the semi-crystalline polyester has one or more Tg values less than 55° C., a sharp melting point of 50 to 200° C. and preferably a number average molecular weight of at least 1600. The composition may, if desired, include an amorphous polyester and the curing agent may be, for example, an epoxy resin or a bis(beta-hydroxyalkylamide).
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: February 6, 2001
    Assignee: Courtaulds Coatings (Holdings) Limited
    Inventors: Luke James O'Keeffe, Steven Alistair Nixon, Colin Cameron, Alan Keith Penman