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).
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Patent number: 5741620Abstract: 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: GrantFiled: January 16, 1996Date of Patent: April 21, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
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Patent number: 5663024Abstract: 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: GrantFiled: November 1, 1996Date of Patent: September 2, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
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Patent number: 5599886Abstract: 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: GrantFiled: February 22, 1996Date of Patent: February 4, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
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Patent number: 5532111Abstract: 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: GrantFiled: November 4, 1994Date of Patent: July 2, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
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Patent number: 5521271Abstract: 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: GrantFiled: September 29, 1994Date of Patent: May 28, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, S. Prabhakara Rao, David W. Macomber
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Patent number: 5461155Abstract: 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: GrantFiled: April 19, 1995Date of Patent: October 24, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, David W. Macomber
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Patent number: 5362812Abstract: 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: GrantFiled: April 23, 1993Date of Patent: November 8, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
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Patent number: 5314998Abstract: 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: GrantFiled: September 8, 1992Date of Patent: May 24, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, David W. Macomber
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Patent number: 5256784Abstract: 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: GrantFiled: January 16, 1992Date of Patent: October 26, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventors: Cecil V. Francis, Elisa M. Cross, Roberta E. Harelstad, Paul F. Korkowski, Peter C. Leung, David W. Macomber, John E. Trend
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Patent number: 5180705Abstract: 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: GrantFiled: March 11, 1991Date of Patent: January 19, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventors: Terrance P. Smith, David W. Macomber, Jeffrey C. Chang, Linda K. Williams