Patents by Inventor Rex J. Dalzell

Rex J. Dalzell 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).

  • Nonsmearing correction fluid
    Patent number: 4654081
    Abstract: Improved correction fluid for obscuring indicia on sheet material. Such fluid, which normally comprises a solution of pigmented thermoplastic resin, is rendered capable of obscuring typed, xerographically copied, or written ink indicia by using a solvent system having a refractive index of 1.410 or less. A preferred non-flammable system includes 20-40 volume percent 1,1,2-trichlorotrifluoroethane and correspondingly 80-60 volume percent heptane.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: March 31, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Rex J. Dalzell
  • Dispersed imaging systems with tetra (hydrocarbyl) borate salts
    Patent number: 4450227
    Abstract: Light sensitive systems comprising a tetra(hydrocarbyl)borate and a dye may be used in the form of a dispersion, with the light sensitive borate and dye in one phase which is dispersed within a second phase.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: May 22, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Brian N. Holmes, Rex J. Dalzell, Steven M. Aasen
  • Fixing of tetra(hydrocarbyl)borate salt imaging systems
    Patent number: 4447521
    Abstract: Imaging systems comprising a tetra(hydrocarbyl)borate and a bleachable dye may be rendered desensitizable by the inclusion of a second bleachable dye which absorbs radiation in a different portion of the electromagnetic spectrum than the first bleachable dye.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: May 8, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: George V. D. Tiers, Steven M. Aasen, Rex J. Dalzell, Brian N. Holmes
  • Fixing of tetra (hydrocarbyl) borate salt imaging systems
    Patent number: 4343891
    Abstract: A method for forming an image includes the step of desensitizing a radiation sensitive imaging system comprising a dye and a tetra (hydrocarbyl) borate in a binder by converting the tetra (hydrocarbyl) borate to a compound having fewer than four carbon-to-boron bonds.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: August 10, 1982
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Aasen, Rex J. Dalzell, Edward J. Goettert, Brian N. Holmes, George V. D. Tiers
  • Imaging systems with tetra(aliphatic) borate salts
    Patent number: 4307182
    Abstract: A radiation sensitive element comprising a substrate having coated on at least one side thereof a layer comprising a radiation sensitive tetra(aliphatic) borate salt.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: December 22, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Rex J. Dalzell, Edward J. Goettert, George V. D. Tiers