Patents by Inventor David Allen Lewis Davies

David Allen Lewis Davies 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).

  • Patent number: 4062941
    Abstract: The present invention encompasses a method for treating fungal infections in animals comprising administering to animals in need of antifungal treatment an effective amount of fungal cell lytic enzymes extracted from Coprinus, Lycoperdon, or Bolbitius in conjunction with conventional antimycotic agents such as amphotericin B or Nystatin. The fungal cell lytic enzymes are extracted from Coprinus, Lycoperdon, and Bolbitius by conventional enzyme isolation techniques. These fungal cell lytic enzymes retain their activity in vivo, are relatively non toxic and destroy fungi by degrading fungal cell walls and weakening the fungal cell walls so that conventional antimycotic agents are far more effective. The method of the present invention is particularly useful in treating infections by opportunistic fungi such as Aspergillus fumigatus and Candida albicans.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: December 13, 1977
    Assignee: G. D. Searle & Co. Ltd.
    Inventor: David Allen Lewis Davies
  • Patent number: 4017471
    Abstract: The present invention relates to an antitumor agent comprising p-di(2-chloroethyl)amino-L-phenylalanine or N,N-bis(2-chloroethyl)p-phenylenediamine hydrochloride bound to a tumor specific antibody by peptide bonds. The antitumor agent of the present invention is prepared by reacting a cytotoxic agent, p-di(2-chloroethyl)amino-L-phenylalanine or N,N-bis(2-chloroethyl)p-phenylenediamine hydrochloride with a tumor specific antibody in the presence of a water soluble carbodiimide such as 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride and thereby forming a peptide bond between the cytotoxic agent and the tumor specific antibody.
    Type: Grant
    Filed: September 15, 1975
    Date of Patent: April 12, 1977
    Assignee: G. D. Searle & Co.
    Inventor: David Allen Lewis Davies