Patents by Inventor Foo S. Hom

Foo S. Hom 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: 5360615
    Abstract: This invention relates to a solvent system for enhancing the solubility of an acidic, basic, or amphoteric pharmaceutical agent to produce a highly concentrated solution suitable for softgel filling or two piece encapsulation. The solvent system comprises polyethylene glycol containing 0.2-1.0 mole equivalents of an ionizing agent per mole equivalent pharmaceutical agent and 1-20% water. Glycerin or polyvinylpyrrolidone may be added to further enhance the solubility of certain drugs. The disclosed solvent system is capable of enhancing solubilities of pharmaceutical agents 40-400%.The ionizing agent functions by causing partial ionization (neutralization) of the free pharmaceutical agent. When the pharmaceutical agent is acidic, the ionizing agent is preferably a hydroxide ion species, whereas when the pharmaceutical agent is basic, the ionizing agent is preferably a hydrogen ion species.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: November 1, 1994
    Assignee: R. P. Scherer Corp.
    Inventors: Man S. Yu, Foo S. Hom, Sibaprasanna Chakrabarti, Chong-Heng Huang, Mahendra Patel
  • Patent number: 5071643
    Abstract: This invention relates to a solvent system for enhancing the solubility of an acidic, basic, or amphoteric pharmaceutical agent to produce a highly concentrated solution suitable for softgel filling or two piece encapsulation. The solvent system comprises polyethylene glycol containing 0.2-1.0 mole equivalents of an ionizing agent per mole equivalent pharmaceutical agent and 1-20% water. Glycerin or polyvinylpyrrolidone may be added to further enhance the solubility of certain drugs. The disclosed solvent system is capable of enhancing solubilities of pharmaceutical agents 40-400%.The ionizing agent functions by causing partial ionization (neutralization) of the free pharmaceutical agent. When the pharmaceutical agent is acidic, the ionizing agent is preferably a hydroxide ion species, whereas when the pharmaceutical agent is basic, the ionizing agent is preferably a hydrogen ion species.
    Type: Grant
    Filed: October 9, 1987
    Date of Patent: December 10, 1991
    Assignee: R. P. Scherer Corporation
    Inventors: Man S. Yu, Foo S. Hom, Sibaprasanna Chakrabarti, Chong-Heng Huang, Mahendra Patel
  • Patent number: 4800083
    Abstract: A capsule product and method for gradually releasing a medicament for absorption to a body of a warm blooded animal through the gastrointestinal system. The capsule has a fill material which includes a masticatory substance and a medicament that is dispersed throughout the gum. The medicament is of a type that is effectively and desirably released for absorption by the body through the gastrointestinal tract over an extended period of time. The masticatory substance forms a supporting cohesive matrix for the medicament. The gelatin shell, usually formed from gelatin, water, and a plasticizer, formed around the fill material into a capsule of a size and shape to be readily swallowable. Upon swallowing, the gelatin shell is rapidly dissolved in the gastrointestinal juices, while the fill material is substantially insoluble in the gastrointestinal juices.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: January 24, 1989
    Assignee: R. P. Scherer Corporation
    Inventors: Foo S. Hom, William R. Ebert
  • Patent number: 4532126
    Abstract: A chewable, filled, one-piece soft elastic gelatin (SEG) capsule. The capsule includes a shell which is formed from a formulation of gelatin, water, a plasticizer, and a masticatory substance. The masticatory substance is present in the shell in an amount of about 1-75 percent by weight and the gelatin is present in the shell in an amount of about 10-90 percent by weight. A fill material is contained within the shell. The fill may be selected from a variety of materials, including candy, various confectionaries, antacids, cough and cold preparations, sore throat remedies, antiseptics, dental preparations, such as fluorides, breath fresheners, and the like. In manufacturing the SEG capsules, a molten gel mass is prepared with a dispersion of a molten masticatory substance therein. A suitable fill material is also prepared. The gelatin formulation containing the masticatory substance dispersed therein is formed as a shell around the fill material.
    Type: Grant
    Filed: November 8, 1983
    Date of Patent: July 30, 1985
    Assignee: R. P. Scherer Corporation
    Inventors: William R. Ebert, Foo S. Hom, Warren W. Kindt
  • Patent number: 4428927
    Abstract: A chewable, filled, one-piece soft elastic gelatin (SEG) capsule. The capsule includes a shell which is formed from a formulation of gelatin, water, a plasticizer, and a masticatory substance. The masticatory substance is present in the shell in an amount of about 1-75 percent by weight and the gelatin is present in the shell in an amount of about 10-90 percent by weight. A fill material is contained within the shell. The fill may be selected from a variety of materials, including candy, various confectionaries, antacids, cough and cold preparations, sore throat remedies, antiseptics, dental preparations, such as fluorides, breath fresheners, and the like. In manufacturing the SEG capsules, a molten gel mass is prepared with a dispersion of a molten masticatory substance therein. A suitable fill material is also prepared. The gelatin formulation containing the masticatory substance dispersed therein is formed as a shell around the fill material.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: January 31, 1984
    Assignee: R. P. Scherer Corporation
    Inventors: William R. Ebert, Foo S. Hom, Warren W. Kindt