Patents by Inventor Mark Allen Crawford

Mark Allen Crawford 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).

  • Method of making a plant container
    Patent number: 6627132
    Abstract: A composition and method for forming plant containers, such as plant propagation trays providing control of plant root growth. The method includes applying to a sheet of thermoformable plastic an aqueous coating composition including between approximately 20% and 45% by weight non-delaminating acrylic latex, between approximately 8% and 30% by weight copper hydroxide, between approximately 2% and 20% by weight filler, and between approximately 0.5% and 5% by weight dispersant. The coating is dried and the plastic sheet is heated to a temperature sufficient to form the plastic. The plastic sheet is then formed into a desired shape.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: September 30, 2003
    Assignee: Griffin Corporation
    Inventors: Mark Allen Crawford, Hamid Ullah