Patents by Inventor Wilfred H. Hallam

Wilfred H. Hallam 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).

  • Patent number: 4904639
    Abstract: The present specification discloses an air freshener and a method of manufacturing the air freshener. The air freshener comprises a homogenized mixture of a water-miscible solid thermoplastic synthetic plastics material and water, with a perfume incorporated therein and therethrough. A suitable plastics material is a polyethylene glycol. The air freshener is manufactured by mixing the thermoplastic synthetic plastics material in granular or particulate form with a plasticizer therefore, homogenizing the mixture and incorporating a quantity of perfume in the homogenized mixture. In use, additional perfume can be released as desired by adding water to the air freshener.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: February 27, 1990
    Assignee: Joseph Burley
    Inventor: Wilfred H. Hallam