Patents by Inventor David Morgan Smith

David Morgan Smith 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).

  • Flame-retardant magnesium hydroxide compositions and associated methods of manufacture and use
    Patent number: 7514489
    Abstract: The invention provides a submicron magnesium hydroxide particulate composition comprising a first distribution of magnesium hydroxide particles having a D50 of no more than about 0.30 ?m, a D90 of no more than about 1.5 ?m, and a BET surface area of at least about 35 m2/g, which can be used as a flame-retardant additive for synthetic polymers, optionally in combination with other flame-retardant additives such as nanoclays and larger-sized magnesium hydroxide particulate compositions. Polymeric resins comprising the submicron magnesium hydroxide particles and methods of manufacturing submicron magnesium hydroxide particles are also provided.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: April 7, 2009
    Assignee: Martin Marietta Materials, Inc.
    Inventors: Lemuel O. Granada, Jr., James Innes, David Morgan Smith, Mark Wajer
  • Nutritive feed binder
    Patent number: 5378471
    Abstract: A binder composition particularly well suited for pelleted and compressed aquatic animal feeds comprising: 10-17%, by weight a reactive metal source; 25-35%, by weight, a reactive metal oxide or hydroxide; 18-28%, by weight, sugar and 28-42%, by weight, corn syrup solids. The binder composition produces feeds with lower calcium and magnesium concentrations that typically utilized binders.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: January 3, 1995
    Assignee: Martin Marietta Magnesia Specialties Inc.
    Inventor: David Morgan Smith