Patents by Inventor Millice F. Hobbs

Millice F. Hobbs 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: 4402758
    Abstract: A method for cleaning porous diffusion tiles used in systems for distributing oxygen or oxygen containing gas in water bodies is disclosed. The build-up of scale, which blocks the pores in such diffusion tiles, is removed by (1) purging the oxygen distribution system with a nonoxidizing gas such as nitrogen, (2) injecting substantially pure HCl gas through the system which removes the scale, and (3) purging the system again with the nonoxidizing gas before resuming flow of oxygen or oxygen containing gas. The use of a nonoxidizing purge gas before and after acid treatment prevents severe corrosion in the oxygen distribution system caused by the simultaneous presence of HCl gas and oxygen.
    Type: Grant
    Filed: February 16, 1982
    Date of Patent: September 6, 1983
    Assignee: Sterling Drug Inc.
    Inventor: Millice F. Hobbs
  • Patent number: 4124499
    Abstract: A method is provided for rapidly producing a treated waste mixture separable into a disposable mass of solids and a hygenic effluent of relatively low coliform count. The method of treating aqueous mediums involves steps wherein a mixture of aqueous medium and four chemical additives, plus, if desired, a pH control agent, are established as a mixture in a holding zone, the solids of the mixture having a particle size resulting from recirculation between the holding zone and a zone adapted to effect coarse disintegration of any solids exceeding a predetermined size, passing the mixture thru an airtight liquid flow system under conditions to maintain solids in suspension and then separating the liquid portion thereof from the solids associated therewith for disposal as a hygenic effluent.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: November 7, 1978
    Assignee: FMC Corporation
    Inventors: Millice F. Hobbs, Arthur C. Green