Patents by Inventor Philip Howard Chapman

Philip Howard Chapman 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).

  • Solid or gel polymers containing a plurality of free hydrazone groups
    Patent number: 4076913
    Abstract: Novel polymers are provided which carry diazomethylene or hydrazonomethylene groups. Such polymers are of special use in immobilizing carboxylic acids, such as amino acids, with a view to subsequent chemical transformation of such acids, e.g. peptide synthesis. Alcohols and thiols may also be immobilized using the new polymers. Methods for the preparation of the polymers are provided, starting from a variety of polymer types.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: February 28, 1978
    Assignee: Glaxo Laboratories Limited
    Inventors: Derek Walker, Philip Howard Chapman
  • Acid derivative immobilized cephalosporin carboxylic carrying polymer
    Patent number: 4067858
    Abstract: There are provided cephalosporin and penicillin carboxylic acid derivatives which comprise polymers carrying a plurality of molecules of said acid, the carboxyl groups of which are blocked by attachment to the polymer, principally by forming ester linkages to aliphatic carbon atoms in the polymer. There are also provided methods of immobilizing cephalosporin and penicillin acids on polymers and of carrying out chemical reactions to modify said acids.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: January 10, 1978
    Assignee: Glaxo Laboratories Limited
    Inventors: Derek Walker, Philip Howard Chapman
  • Aqueous insoluble polymers containing a plurality of diazomethylene groups
    Patent number: 4038469
    Abstract: Novel polymers are provided which carry diazomethylene or hydrazonomethylene groups. Such polymers are of especial use in immobilizing carboxylic acids, such as amino acids, with a view to subsequent chemical transformation of such acids, e.g. peptide synthesis. Alcohols and thiols may also be immobilized using the new polymers. Methods for the preparation of the polymers are provided, starting from a variety of polymer types.
    Type: Grant
    Filed: July 30, 1974
    Date of Patent: July 26, 1977
    Assignee: Glaxo Laboratories Limited
    Inventors: Derek Walker, Philip Howard Chapman