Patents by Inventor George H. Crawford, Jr.

George H. Crawford, 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).

  • Thermoreversible organogels for photothermographic elements
    Patent number: 5415993
    Abstract: A photographic emulsion containing: a photosensitive silver halide; a light-insensitive, reducible silver source; a reducing agent for the light-insensitive, reducible silver source; and a binder consisting essentially of poly(vinyl butyral) having a poly(vinyl alcohol) content of about 17.5 to 21.0 wt. % and at least one solvent selected from the group consisting of: toluene, methyl ethyl ketone, acetone, tetrahydrofuran, and 1,4-dioxane. Additionally, a process for coating a substrate involving applying at least one layer of a molten thermoreversible organogel layer; causing it to gel; and removing residual solvent.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: May 16, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth L. Hanzalik, George H. Crawford, Jr., Sharon M. Rozzi, David J. Scanlan
  • Process for simultaneously coating multiple layers of thermoreversible organogels and coated articles produced thereby
    Patent number: 5378542
    Abstract: Process for the simultaneous application of at least two molten, thermoreversible organogel layers to a substrate. The organogel layers can optionally contain dispersed additive ingredients, such as pigments. The organogel layers are coated onto a suitable substrate and then rapidly cooled or chilled to form a gel. Residual solvent is then removed. Multilayer coated films are thus formed with minimal interlayer mixing or interlayer diffusion of the additive ingredients.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: January 3, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth L. Hanzalik, George H. Crawford, Jr., Sharon M. Rozzi, David J. Scanlan
  • Process for simultaneously coating multiple layers of thermoreversible organogels and coated articles produced thereby
    Patent number: 5340613
    Abstract: Process for the simultaneous application of at least two molten, thermoreversible organogel layers to a substrate. The organogel layers can optionally contain dispersed additive ingredients, such as pigments. The organogel layers are coated onto a suitable substrate and then rapidly cooled or chilled to form a gel. Residual solvent is then removed. Multilayer coated films are thus formed with minimal interlayer mixing or interlayer diffusion of the additive ingredients.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: August 23, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kenneth L. Hanzalik, George H. Crawford, Jr., Sharon M. Rozzi, David J. Scanlan