Patents by Inventor Harold C. Arvidson, Jr.

Harold C. Arvidson, Jr. 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).

  • Flat photographic film produced by heating above the second order transition temperature of the base
    Patent number: 3939000
    Abstract: A process for producing flat sheets, particularly photographic sheets for use in automatic film changing equipment, from a stored roll of material. A thermoplastic film is briefly heated to above its second order transition temperature but not over 120.degree. centigrade prior to cutting for packaging. Such heating removes roll curl developed during storage of the film in rolls, without adversely affecting the quality of the film.
    Type: Grant
    Filed: November 21, 1973
    Date of Patent: February 17, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Harold C. Arvidson, Jr., Quayton Ray Stottlemyer