Patents by Inventor Patrick Hugh McLeod

Patrick Hugh McLeod 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: 4120715
    Abstract: The invention provides a method of making a filter for use in venting a colostomy or ileostomy bag. An assembly comprising a first sheet of a gas permeable and water impermeable material, a second sheet of material which is gas permeable or is rendered gas permeable by the provision of at least one aperture therethrough, and a sheet of carbon cloth between the first and second sheets is fed to a sealing station. In the sealing station the assembly of sheets is sealed together, preferably heat sealed by a weld extending through the periphery of the carbon cloth, to form a filter comprising two pieces of the above mentioned first and second sheets with a piece of the carbon cloth sealed therebetween. The filter is then removed from the remainder of the assembly.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: October 17, 1978
    Assignee: Matburn (Holdings) Limited
    Inventors: Malcolm Charles Ockwell, Patrick Hugh McLeod, Peter James Briggs