Patents by Inventor O. Alfred Barton

O. Alfred Barton 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).

  • Overlay proofing film
    Patent number: 4842950
    Abstract: An improved overlay proofing film comprising a substantially transparent polyester base film which is first coated on one or both sides with a non-light sensitive composition having a refractive index of about 1.6, said non-light sensitive composition consisting essentially of a copolymer of polymethyl methacrylate and methacrylic acid.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: June 27, 1989
    Assignee: Hoechst Celanese Corporation
    Inventor: O. Alfred Barton
  • Overlay proofing film
    Patent number: 4748101
    Abstract: An improved overlay proofing film comprising a substantially transparent polyester base film which is first coated on one or both sides with a non-light sensitive composition having a refractive index of about 1.6, said non-light sensitive composition consisting essentially of a copolymer of polymethyl methacrylate and methacrylic acid, said coated polyester base film having a second coating on either side thereon, said second coating comprising a light sensitive mixture of(a) a resinous binder;(b) a colorant; and(c) a light sensitive material.
    Type: Grant
    Filed: November 4, 1986
    Date of Patent: May 31, 1988
    Assignee: Hoechst Celanese Corporation
    Inventor: O. Alfred Barton
  • Overlay light-sensitive proofing film with transparent aluminum oxide and transparent magnesium fluoride layers therein
    Patent number: 4634652
    Abstract: This invention relates to an improved overlay proofing film. More, particularly, the invention relates to an improved overlay proofing film comprising a substantially transparent polyester base film which has deposed thereon a substantially uniform adhesive layer comprising aluminum oxide, which adhesive layer has deposed thereon a substantially uniform optical layer comprising magnesium fluoride, said polyester base film being coated on either side with a light sensitive mixture ofa. a resinous binder;b. a colorant; andc. a light sensitive material.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: January 6, 1987
    Assignee: American Hoechst Corporation
    Inventor: O. Alfred Barton