Patents by Inventor David W. Macomber

David W. Macomber 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).

  • Patent number: 5741620
    Abstract: Reactive polymeric dyes are provided comprising a chromophoric moiety derived from at least one free radically polymerizable dye and an azlactone moiety derived from 2-alkenylazlactone such that the free radically polymerizable dye is incorporated into the backbone of the polymer. Alternatively, 2-alkenylazlactone is polymerized and then derivatized with a nucleophilic dye or dyes, such that the chromophoric potion of the dye is pendent to the polymer backbone. Both types of reactive polymeric dyes may also contain additional polymerized monomeric units. The reactive polymeric dyes of the present invention can be used in a photoresist system and in particular in a color proofing construction.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: April 21, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
  • Patent number: 5663024
    Abstract: Polymeric dyes that comprise (a) segments that render the dyes soluble or dispersible in hydrocarbon solvents and (b) segments that impart color. The polymeric dyes can be introduced into hydrocarbon solvents or formed in hydrocarbon solvents to form stable colored dispersions, which can be used as toners for electrophotography. In these toners, the polymeric dye contains macromeric moieties that render the polymeric dye dispersible in hydrocarbon solvents. The polymeric dye may contain either a charge-directing chelating moiety or a surface-release promoting moiety or both of these moieties.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: September 2, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
  • Patent number: 5599886
    Abstract: Polymeric dyes that comprise (a) segments that render the dyes soluble or dispersible in hydrocarbon solvents and (b) segments that impart color. The polymeric dyes can be introduced into hydrocarbon solvents or formed in hydrocarbon solvents to form stable colored dispersions, which can be used as toners for electrophotography. In these toners, the polymeric dye contains macromeric moieties that render the polymeric dye dispersible in hydrocarbon solvents. The polymeric dye may contain either a charge-directing chelating moiety or a surface-release promoting moiety or both of these moieties.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: February 4, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
  • Patent number: 5532111
    Abstract: Reactive polymeric dyes are provided comprising a chromophoric moiety derived from at least one free radically polymerizable dye and an azlactone moiety derived from 2-alkenylazlactone such that the free radically polymerizable dye is incorporated into the backbone of the polymer. Alternatively, 2-alkenylazlactone is polymerized and then derivatized with a nucleophilic dye or dyes, such that the chromophoric portion of the dye is pendent to the polymer backbone. Both types of reactive polymeric dyes may also contain additional polymerized monomeric units. The reactive polymeric dyes of the present invention can be used in a photoresist system and in particular in a color proofing construction.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: July 2, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
  • Patent number: 5521271
    Abstract: Polymeric dyes that comprise (a) segments that render the dyes soluble or dispersible in hydrocarbon solvents and (b) segments that impart color. The polymeric dyes can be introduced into hydrocarbon solvents or formed in hydrocarbon solvents to form stable colored dispersions, which can be used as toners for electrophotography. In these toners, the polymeric dye contains macromeric moieties that render the polymeric dye dispersible in hydrocarbon solvents. The polymeric dye may contain either a charge-directing chelating moiety or a surface-release promoting moiety or both of these moieties.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: May 28, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
  • Patent number: 5461155
    Abstract: Metal-Azomethine dyes with excellent solubility in organic media. The dyes have an arene nucleus and are substituted, in part, with a non-free-radically polymerizable alkyldiketonate or 8-hydroxyquinolate ligand. The dyes are useful in dye diffusion transfer processes.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: October 24, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, David W. Macomber
  • Patent number: 5362812
    Abstract: Reactive polymeric dyes are provided comprising a chromophoric moiety derived from at least one free radically polymerizable dye and an azlactone moiety derived from 2-alkenylazlactone such that the free radically polymerizable dye is incorporated into the backbone of the polymer. Alternatively, 2-alkenylazlactone is polymerized and then derivatized with a nucleophilic dye or dyes, such that the chromophoric portion of the dye is pendent to the polymer backbone. Both types of reactive polymeric dyes may also contain additional polymerized monomeric units. The reactive polymeric dyes of the present invention can be used in a photoresist system and in particular in a color proofing construction.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: November 8, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
  • Patent number: 5314998
    Abstract: Metal-azo dyes with excellent solubility in organic media are provided. The metal-containing dyes of the present invention have a nucleus of the formula: ##STR1## wherein the substituents have the meaning given in the description. Dye-donor sheets comprising the above-mentioned dyes are also disclosed.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: May 24, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, David W. Macomber
  • Patent number: 5256784
    Abstract: Nonlinear-optic (NLO) compositions containing functionalized merocyanine dyes, such that the molecules, comprising the NLO-active compositions have a functional group at each end of the molecule and each functional group differing in reactivity, thus permitting stepwise reaction of each functional group, and NLO-active molecules prepared from hemioxonol dyes derviatived with (meth)acrylate or (meth)acrylamide groups, and their uses in devices such as second harmonic generators or polymer integrated optics.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: October 26, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Cecil V. Francis, Elisa M. Cross, Roberta E. Harelstad, Paul F. Korkowski, Peter C. Leung, David W. Macomber, John E. Trend
  • Patent number: 5180705
    Abstract: Dye donor sheets comprising a substrate having a coating comprising a binder and at least one neutral 1:1 metal-azo or neutral 1:1 metal-azomethine dye having the general structure: ##STR1## wherein Z.sub.1 and Z.sub.2 each independently represent an arene nucleus, having from 5 to 14 ring atoms;G.sub.1 and G.sub.2 each independently represent a metal ligating group, and further wherein G.sub.1 and G.sub.2 may be contained within or pendant from at least one of Z.sub.1 and Z.sub.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: January 19, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Terrance P. Smith, David W. Macomber, Jeffrey C. Chang, Linda K. Williams