Patents by Inventor Phillip M. John

Phillip M. John 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-release pharmaceutical tablet and process for preparation thereof
    Patent number: 4415547
    Abstract: A sustained-release pharmaceutical tablet consisting essentially of drug pellets encapsulated with a water-soluble film-forming substance and a water-insoluble film-forming substance and blended and compressed into tablet form with a compressible tableting mixture and a process for preparation thereof are disclosed.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: November 15, 1983
    Assignee: Sterling Drug Inc.
    Inventors: Andrew B. C. Yu, Phillip M. John
  • Easily-swallowed, powder-free and gastric-disintegrable aspirin tablet thinly-coated with hydroxypropyl methylcellulose and aqueous spray-coating preparation thereof
    Patent number: 4302440
    Abstract: A method for preparing an easily-swallowed, powder-free, gastric-disintegrable and thinly-coated aspirin tablet, which does not have the characteristic aspirin taste, does not produce the esophageal discomfort of an uncoated aspirin tablet and does not disintegrate in the stomach materially slower than the uncoated aspirin tablet, which comprises aqueous spray-coating hydroxypropyl methylcellulose onto all exterior surfaces of an aspirin tablet, the amount of hydroxypropyl methylcellulose being between 0.5 and 2.0 parts by weight per 100 parts by weight of the aspirin tablet.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: November 24, 1981
    Assignee: Sterling Drug Inc.
    Inventors: Phillip M. John, Raymond J. Belanger, Myron Paikoff