Patents by Inventor Yu-chang J. Wang

Yu-chang J. Wang 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: 5011678
    Abstract: Pharmaceutically active substances are administered in aerosol form by applying to a mucosal surface of the body a composition comprising a medically effective amount of a pharmaceutically active substance, a biocompatible amphiphilac steroid and a bicompatible (hydro/fluoro)carbon propellant.
    Type: Grant
    Filed: February 1, 1989
    Date of Patent: April 30, 1991
    Assignee: California Biotechnology Inc.
    Inventors: Yu-chang J. Wang, William A. Lee, Blair Narog
  • Patent number: 4447426
    Abstract: A monohydrate of a steroid having the structure ##STR1## and the 1,2-dehydro derivatives thereof, is provided which monohydrate is in the form of a particulate material having a stable average particle size of less than about 20 microns. Cream and lotion formulations containing the steroid monohydrate and a method for forming the monohydrate are also provided.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: May 8, 1984
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Yu-Chang J. Wang, Friedrich Dursch, Richard L. O'Laughlin, Thaddeus Prusik
  • Patent number: 4391755
    Abstract: A monohydrate of a steroid having the structure ##STR1## and the 1,2-dehydro derivatives thereof, is provided which monohydrate is in the form of a particulate material having a stable average particle size of less than about 20 microns. Cream and lotion formulations containing the steroid monohydrate and a method for forming the monohydrate are also provided.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: July 5, 1983
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Yu-Chang J. Wang, Dursch Friedrich, Richard L. O'Laughlin, Thaddeus Prusik
  • Patent number: 4299828
    Abstract: Corticosteroid formulations in the form of a lipophilic stick are provided which are used as anti-inflammatory agents; the lipophilic stick includes the corticosteroid, such as halcinonide or triamcinolone acetonide, dissolved in an oleaginous solvent which is miscible with the other stick ingredients, which solvents include isostearyl alcohol, dibutyl sebacate, castor oil and/or mineral oil, one or more waxes to provide body and stiffness, and an anti-microbial agent to prevent growth and eliminate the spreading of microbes on the surface of the stick, such as propylene glycol or 1,3-butylene glycol.
    Type: Grant
    Filed: October 16, 1980
    Date of Patent: November 10, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Yu-chang J. Wang, Thomas M. Wong
  • Patent number: 4292972
    Abstract: A lyophilized foam sponge product having medically useful hemostatic and adhesive properties formed from the hydrocolloids, gelatin, pectin, and sodium carboxymethylcellulose and having a density of from about 0.01 to about 0.10 grams/cc. The gelatin is present at from about 20% to about 80% by weight of the final product and the pectin and sodium carboxymethylcellulose are each present at from about 10% to about 50% by weight of the final product. The product is prepared by forming an aqueous colloidal dispersion of hydrocolloids, aerating or foaming, freezing, and lyophilizing.
    Type: Grant
    Filed: July 9, 1980
    Date of Patent: October 6, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: John M. Pawelchak, Yu-Chang J. Wang, Anthony L. LaVia
  • Patent number: 4233295
    Abstract: Corticosteroid formulations in the form of creams, lotions or ointments are provided which are used as anti-inflammatory agents, wherein the corticosteroid, such as halcinonide (21-chloro-9-fluoro-11.beta.-hydroxy-16.alpha.,17-[(1-methylethylidene)-bi s(oxy)]pregn-4-ene-3,20-dione) is dissolved in a sebacate carrier, such as dibutyl sebacate.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: November 11, 1980
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: John A. Hill, Yu-chang J. Wang, Thomas M. Wong