Patents by Inventor George Leland Fletcher

George Leland Fletcher 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).

  • Polysulfonamides
    Patent number: 4107155
    Abstract: A polymer is disclosed having repeating units with the structures ##STR1## AND ##STR2## WHEREIN R.sup.1 and R.sup.2 are the same or different, and are each hydrogen, halogen or alkyl from 1 to about 3 carbon atoms,n is 2 or 3,x and y are mole percentage amounts of the respective repeating units,x ranging from 0 to about 90% and y being at least 10%, andZ represents the atoms necessary to form a saturated or unsaturated carbocyclic ring having from about 5 to about 7 carbon ring atoms.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: August 15, 1978
    Assignee: Eastman Kodak Company
    Inventors: George Leland Fletcher, Stewart H. Merrill
  • Vesicular composition, element and process utilizing a diol
    Patent number: 4106938
    Abstract: A light-sensitive vesicular imaging composition is disclosed comprising a vesiculating agent which liberates gas upon exposure to activating radiation, a binder and a diol speed-increasing agent. The composition is coated as a thin film. Imagewise irradiation of the element causes gas to be released in the exposed areas. The composition, comprising gas entrapped in a thermoplastic matrix, can be heated to produce a visible record.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: August 15, 1978
    Assignee: Eastman Kodak Company
    Inventors: George Leland Fletcher, Jr., Jonas Dedinas
  • Water soluble binder overcoat on vesicular element containing N.sub.2 -releasing agent
    Patent number: 4093463
    Abstract: A light-sensitive vesicular imaging element and a method of manufacture are provided, comprising a vesiculating layer which includes a binder and vesiculating agent which liberates gas upon exposure to activating radiation, and an overcoat which contains a polymer soluble in a solvent in which the binder of the vesiculating layer is substantially insoluble. Upon imagewise irradiation of the element, gas bubbles are generated in the exposed areas. The bubbles may be developed to a visible record by overall heating.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: June 6, 1978
    Assignee: Eastman Kodak Company
    Inventors: George Leland Fletcher, Michael Mosehauer
  • Heat sensitive dye layers comprising a benzopinacol
    Patent number: 4081278
    Abstract: A heat bleachable layer comprising a benzopinacol and a reducible dye or dye precursor is useful in an imaging element. The heat bleachable layer can be, for instance, an antihalation layer of a photographic element, such as a photothermographic element.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: March 28, 1978
    Assignee: Eastman Kodak Company
    Inventors: Jonas Dedinas, George Leland Fletcher, Jr.