Patents by Inventor David S. Chang

David S. Chang 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: 11291683
    Abstract: Compositions for oral administration and processes of preparing the same are described. In particular, compositions in the form of bilayer tablets including B vitamins for modified delivery are described. The bilayer multi-B vitamin tablets offer immediate release of a first set of B vitamins, such as riboflavin (B2) and cyanocobalamin (B12) followed by controlled release of a second set of B vitamins, such as folic acid, biotin, niacinamide (B3), pyridoxine (B6), pantothenic acid (B5) and thiamine (B1).
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: April 5, 2022
    Assignee: ACCESS BUSINESS GROUP INTERNATIONAL LLC
    Inventors: David S. Chang, Dawna Venzon, Shilpa Raut, AllĂ­ Klosner, Janjira Intra, Edward S. Kahler
  • Publication number: 20170281666
    Abstract: Compositions for oral administration and processes of preparing the same are described. In particular, compositions in the form of bilayer tablets including B vitamins for modified delivery are described. The bilayer multi-B vitamin tablets offer immediate release of a first set of B vitamins, such as riboflavin (B2) and cyanocobalamin (B12) followed by controlled release of a second set of B vitamins, such as folic acid, biotin, niacinamide (B3), pyridoxine (B6), pantothenic acid (B5) and thiamine (B1).
    Type: Application
    Filed: March 28, 2017
    Publication date: October 5, 2017
    Inventors: David S. Chang, Dawna Venzon, Shilpa Raut, Alli Klosner, Janjira Intra, Edward S. Kahler
  • Patent number: 8821942
    Abstract: A calcium carbonate granulation and a method for preparing a calcium carbonate granulation are provided. The method includes applying an atomized binder to powdered calcium carbonate in a fluid bed granulator at a relatively high atomization pressure to achieve a reduced binder droplet size, and drying the resulting composition at elevated temperatures in a fluidized bed dryer. The resulting granulation include porous granules having a lower density and reduced mean particle size with improved compressibility. In addition, the resulting granulation can be compacted into tablets having a hardness 50% greater than the hardness of tablets formed from commercially available granulations.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: September 2, 2014
    Assignee: Access Business Group International LLC
    Inventors: David S. Chang, Huoy-Jiun Jean Wang
  • Patent number: 7115283
    Abstract: Preparations for the sustained release of a nutraceutical are described that include a solid matrix coated with a methylcellulose-containing coating. The solid matrix contains a polyphenol and the nutraceutical. Methods of controllably releasing a nutraceutical are also described that include administering to a patient a preparation containing a solid matrix coated with methylcellulose-containing coating. The solid matrix includes a polyphenol and a therapeutically effective amount of the nutraceutical.
    Type: Grant
    Filed: May 6, 2003
    Date of Patent: October 3, 2006
    Assignee: Access Business Group International LLC
    Inventor: David S. Chang
  • Publication number: 20040221868
    Abstract: Preparations for the sustained release of a nutraceutical are described that include a solid matrix coated with a methylcellulose-containing coating. The solid matrix contains a polyphenol and the nutraceutical. Methods of controllably releasing a nutraceutical are also described that include administering to a patient a preparation containing a solid matrix coated with methylcellulose-containing coating. The solid matrix includes a polyphenol and a therapeutically effective amount of the nutraceutical.
    Type: Application
    Filed: May 6, 2003
    Publication date: November 11, 2004
    Inventor: David S. Chang
  • Patent number: 5602535
    Abstract: An apparatus and method allowing a first communication distance between transmitter and receiver for substandard short range control of a vehicle security module, and a second communication distance between transmitter and receiver for standard long range control of the vehicle security module. In this manner, the receivers of numerous vehicles may be programmed all to respond to the same common code, and the short range control used to activate only the vehicle(s) immediately proximate a short range transmitter. Thereafter, the receiver of a selected vehicle may be programmed to respond to a unique code, and the long range control used to activate the receiver of the selected vehicle at a longer distance from a long range transmitter.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: February 11, 1997
    Assignee: The Friedkin Corporation
    Inventors: William E. Boyles, Philip G. Burger, David S. Chang
  • Patent number: 5340509
    Abstract: Disclosed is a process for pelletizing ultra high melt flow crystalline polymers to produce dust-free, uniform ultra high melt flow crystalline pellet products. The process comprises feeding polymer into melting/mixing means, resulting in molten polymer. The molten polymer is transferred to a droplet forming means that produces droplets of the molten polymer. The droplets collect on a continuously moving cooling conveyer and solidify to form dust-free, uniform ultra high melt flow crystalline polymer pellets. Further, the process produces ultra high melt flow crystalline polymer pellets which are uniformly compounded.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: August 23, 1994
    Assignee: Shell Oil Company
    Inventors: David S. Chang, Aaron S. Rhee, Ronald K. Crossland, Jorge O. Buhler-Vidal
  • Patent number: 4620049
    Abstract: The method is particularly adapted for controlling the molecular weight of a product output from a polybutene reactor. The method includes the steps of: deriving from the operating parameter of a polybutene reactor system a formula which correlates molecular weight as determined by product viscosity or other parameters of the product output with operating variables such as temperature of the reactor and concentration of isobutylene in the reactor, which concentration can be controlled by the amount of catalyst, e.g.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: October 28, 1986
    Assignee: Standard Oil Company (Indiana)
    Inventors: Gregory E. Schmidt, Linus K. Leung, Lawrence J. Beck, David S. Chang
  • Patent number: D534646
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: January 2, 2007
    Assignee: Access Business Group International LLC
    Inventors: David S. Chang, Russell K. Randolph, Mary A. Murray
  • Patent number: D401971
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: December 1, 1998
    Inventor: David S. Chang
  • Patent number: D681624
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 7, 2013
    Inventor: David S Chang
  • Patent number: D706254
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: June 3, 2014
    Inventor: David S Chang