Patents by Inventor Ian Grieg Meldrum

Ian Grieg Meldrum 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).

  • Copolymers
    Patent number: 3992310
    Abstract: Copolymers useful as shear stable viscosity index improvers, are graft copolymers of polyisobutylene onto a polystyrene backbone. The copolymers are formed by the grafting of polyisobutylene onto the polystyrene backbone using Friedel Crafts catalysts.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: November 16, 1976
    Assignee: The British Petroleum Company Limited
    Inventors: Eric Simon Forbes, Ian Grieg Meldrum