Patents by Inventor Malcolm D. Brewer

Malcolm D. Brewer 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).

  • Sustained drug release device
    Patent number: 4308250
    Abstract: A device for oral administration to a ruminant animal includes a veterinary medicament, such as an anthelmintic, uniformly dispersed throughout an erodable sheet comprising an ethylene-vinylacetate copolymer. The sheet is rolled up and stuck together with adhesive backed paper strips for administration, and unrolls in the rumen to take up a planar configuration which is retained in the rumen. The sheet may be placed within a plastics netting envelope to give more controlled erosion and release of medicament.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: December 29, 1981
    Assignee: Beecham Group Limited
    Inventors: Gerald J. L. Griffin, Malcolm D. Brewer
  • Sustained drug release device
    Patent number: 4268497
    Abstract: A device for oral administration to a ruminant animal includes a veterinary medicament, such as an anthelmintic, uniformly dispersed throughout an erodable sheet comprising an ethylene-vinylacetate copolymer. The sheet is rolled up and stuck together with adhesive backed paper strips for administration, and unrolls in the rumen to take up a planar configuration which is retained in the rumen. The sheet may be placed within a plastics netting envelope to give more controlled erosion and release of medicament.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: May 19, 1981
    Assignee: Beecham Group Limited
    Inventors: Gerald J. L. Griffin, Malcolm D. Brewer
  • Sustained release compositions
    Patent number: 4228149
    Abstract: Sustained release composition comprising a water soluble veterinary medicament dispersed in a sheet of water insoluble polymer, which sheet is of a size and composition such that it is capable of being constrained in a position which allows oral administration and is, in the rumen, capable of moving relative to this position to retain the composition therein.
    Type: Grant
    Filed: May 30, 1978
    Date of Patent: October 14, 1980
    Assignee: Beecham Group Limited
    Inventors: Malcolm D. Brewer, Gerald J. L. Griffin