Patents by Inventor Jaan M. Uustalu

Jaan M. Uustalu 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).

  • Inactivated polyurethane and a method for preparing it
    Patent number: 4552817
    Abstract: Inactivated polyurethane and a method for preparing it are disclosed. The polyurethane is inactivated by being coated with a layer of a polymer which contains e.g. hydroxyl groups. These hydroxyl groups react with free isocyanate molecules in the polyurethane material and a chemical bonding occurs which prevents noxious isocyanate molecules from coming into contact with the ambient atmosphere. The inactivated polyurethane will thereby be useful in products where it comes into direct contact with the skin or the mucous membranes.
    Type: Grant
    Filed: December 29, 1983
    Date of Patent: November 12, 1985
    Assignee: Protector Agentur AB
    Inventor: Jaan M. Uustalu