Patents by Inventor William L. Wetzel

William L. Wetzel 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).

  • Moisturizing mat and process for making the same
    Patent number: 4219600
    Abstract: A moisturizing mat, and process for making it, are disclosed. The moisturizing mat is suitable for use as a base to promote trickle watering of plants in greenhouses. The mat comprises a wood pulp/fabric layer having an impervious plastic film backing layer. The moisturizing mat is produced by a process including the steps of (a) depositing wood pulp on a first fibrous layer, (b) placing a second fibrous layer on top of the wood pulp, (c) bonding the product of step (b), and (d) bonding an impervious plastic film to one face of the product of step (c).
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: August 26, 1980
    Assignee: Chicopee
    Inventors: Philip Surowitz, William L. Wetzel