Patents by Inventor Carl E. Swanholm

Carl E. Swanholm 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).

  • Photodegradable polyolefins containing an aromatic ketone, ferric stearate, and a pigment
    Patent number: 4038227
    Abstract: Photodegradable hydrocarbon polymers that are susceptible to attack by common microorganisms after exposure to sunlight in a natural atmospheric environment. The polymers include polystyrene and polyethylene polymers and copolymers modified with one or more chemical additives to initiate and to enhance photodegradation.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: July 26, 1977
    Assignee: Bio-Degradable Plastics, Inc.
    Inventors: Carl E. Swanholm, Robert G. Caldwell