Patents by Inventor Omar K. Colwell

Omar K. Colwell 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).

  • Masonry cement
    Patent number: 4144078
    Abstract: A masonry mortar composition with performance parameters of water retention, plasticity and compressive strength greater than the ASTM standards, consisting essentially of Portland cements, aggregate, water and a calcium magnesium aluminum silicate which replaces the conventional hydrated lime. Preferred compositions are disclosed.
    Type: Grant
    Filed: February 15, 1978
    Date of Patent: March 13, 1979
    Assignee: Mid-Florida Mining Co.
    Inventor: Omar K. Colwell