Patents by Inventor David John Hazeldine

David John Hazeldine 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).

  • Accelerator
    Patent number: 3947285
    Abstract: The invention relates to an improved accelerator for gypsum board manufacture, the accelerator containing a ground mixture of gypsum and a long chain fatty carboxylic acid, e.g. stearic acid, or a salt thereof, to the manufacture of the accelerator, and to its use in gypsum board production. The accelerator is less liable to deterioration on storage than conventional gypsum accelerators, and its use yields gypsum board of improved properties.
    Type: Grant
    Filed: August 20, 1973
    Date of Patent: March 30, 1976
    Assignee: BPB Industries Limited
    Inventors: Kenneth Wood Jones, David John Hazeldine