Paper Patents (Class 8/119)
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Patent number: 7914646Abstract: Oxidative compositions and processes that preserve and enhance the brightness and improve color of pulp or paper when applied during different stages of the papermaking process are identified. The oxidative composition and method maintains and/or enhances brightness, prevents yellowing, and enhances the performance of paper products. Used in combination with optical brighteners and/or chelants the oxidative agents produce a synergistic effect not previously identified in the paper process.Type: GrantFiled: July 21, 2006Date of Patent: March 29, 2011Assignee: Nalco CompanyInventors: Prasad Y. Duggirala, Sergey M. Shevchenko, Katherine M. Broadus
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Patent number: 7019134Abstract: Water soluble, amphoteric optical brighteners (W) comprising at least one brightener-characteristic radical X which contain at least one anionic substituent and covalently linked over at least one tertiary amino group Z to at least one non-chromophoric, essentially aliphatic, polyquaternary ammonium-hydrocarbon radical Y containing more than one quaternary ammonium group and in which each hydrocarbon radical is optionally interrupted by and/or substituted with one or more further heteroatoms, have surprising brightening properties, especially in papermaking, and in the form of their aqueous solutions are of notable stability.Type: GrantFiled: December 19, 2000Date of Patent: March 28, 2006Assignee: Clariant Finance (BVI) LimitedInventors: John Martin Farrar, Andrew Clive Jackson
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Patent number: 6890454Abstract: The invention relates to an optical brightener mixture (W) comprising optical brighteners (A) of formula (Ia), and (B) of formula (Ib) and optionally (C) of formula (Ic) as defined herein, their concentrated aqueous solutions (S), their production and their use.Type: GrantFiled: January 8, 2002Date of Patent: May 10, 2005Assignee: Clariant Finance (BVI) LimitedInventors: John Martin Farrar, Andrew Clive Jackson, Alec Stewart Tindal
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Patent number: 6723846Abstract: The present invention relates to compounds having formula (1): wherein each R1 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-hydroxy- or alkoxy-alkoxy, —OCOM, —OCOC1-C4-alkyl, or an amino acid residue from which a hydrogen atom on the amino group has been removed; each R2 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-hydroxy- or alkoxy-alkoxy, —OCOM, —OCOC1-C4-alkyl, —CO2M, CO2C1-C4-alkyl SO3M or phenoxy which is unsubstituted or substituted by halogen, C1-C4-alkyl or C1-C4-alkoxy, —CO2M or CO2C1-C4-alkyl, NH3 or mono- or disubstituted amino; or phenyl which is unsubstituted or substituted by 1 to 3 SO3M, SO2NHC1-C4-alkyl, —SO2NH2, —CO2M, —CO2M, —CO2C1-C4-alkyl, —CONH2, —CONHC1-C4-alkyl, —NHCOC1-C4-alkyl or mono- or disubstituted amino groups;Type: GrantFiled: March 6, 2002Date of Patent: April 20, 2004Assignee: Ciba Specialty Chemicals CorporationInventors: Georges Metzger, Serge Hauger, Fabienne Cuesta, Christophe Bulliard, Peter Rohringer, Marc Roger Grienenberger
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Patent number: 6607813Abstract: A security document is provided comprising a finished cellulosic substrate having at least one transparentized portion formed therein. The transparentized portion comprises a transparentizing composition that is applied so as to define an area of increased transparency in the substrate. The area of increased transparency includes at least one thin line and resembles a simulated security thread. The transparentizing composition can be applied to form thin lines in a variety of configurations on one or both sides of the substrate.Type: GrantFiled: August 23, 2001Date of Patent: August 19, 2003Assignee: The Standard Register CompanyInventors: David E. Washburn, Harry A. Seifert, Watson L. Gullett, Rajendra Mehta
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Patent number: 6331626Abstract: The present invention provides a hydrate of the 4,4′-di-triazinylamino-2,2′-di-sulfostilbene compound having the formula: in which M and M1 independently represent hydrogen, an alkaline-, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterised by an X-ray diffraction pattern which is essentially as set out in the accompanying FIGS. 1 to 11; or a mixture containing one or more of the hydrates of the 4,4′-di-triazinylamino-2,2′-di-sulfostilbene compound having the formula (I); processes for the preparation of the new hydrates; and the use of the new hydrates for the preparation of concentrated aqueous formulations of fluorescent whitening agents.Type: GrantFiled: September 21, 2000Date of Patent: December 18, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, AndrĂ© Geoffroy, Andreas Burkhard, Erwin Marti, Werner Schreiber, Josef Zelger
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Patent number: 6294682Abstract: The invention concerns solutions of alkoxides containing titanium and/or zirconium and/or hafnium and magnesium and/or calcium and/or strontium and/or barium of general formula (I): [MII(OR)2-y(OR1)y]n.[MIV(OR1)4-z(OR)2], in which: MII means magnesium and/or calcium and/or strontium and/or barium; MIV titanium and/or zirconium and/or hafnium; R is an alkyl group with 1 to 18 carbon atoms; R1 is an alkyl group with 1 to 18 carbon atoms, y has a value of between 0 to 2; z has a value of 0 and 4; and n is a number between 0.001 and 3, with the exception that n cannot be 1 when y is 2 and z is 0, or when y is 0 and z is 4. The invention further concerns the production of these alkoxides and their use.Type: GrantFiled: June 19, 2000Date of Patent: September 25, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Hartwig Rauleder, Burkhard Standke, Michael Horn, Hans-Joachim Kotzsch, Hans-Gunther Srebny
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Patent number: 6241780Abstract: This invention relates to a method for strengthening a cellulosic substrate by treating the substrate with a formaldehyde-free curable aqueous composition and curing the composition. The cellulosic substrates include, for example, paper oil- and air-filter stock, rayon nonwoven wipes, cellulosic laminating stock, cotton woven fabrics, and wood flakes suitable to be consolidated into flakeboard.Type: GrantFiled: February 27, 1995Date of Patent: June 5, 2001Assignee: Rohm and Haas CompanyInventors: Charles Thomas Arkens, Scott Lind Egolf, Robert David Gleim, Oscar Hsien-Hsiang Hsu, Kenneth John Wiesinger
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Patent number: 6153122Abstract: The present invention provides a hydrate of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula: ##STR1## in which M and M.sub.1 independently represent hydrogen, an alkaline-, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterized by an X-ray diffraction pattern which is essentially as set out in the accompanying FIGS. 1 to 11; or a mixture containing one or more of the hydrates of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula (I); processes for the preparation of the new hydrates; and the use of the new hydrates for the preparation of concentrated aqueous formulations of fluorescent whitening agents.Type: GrantFiled: May 19, 1998Date of Patent: November 28, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Andre Geoffroy, Andreas Burkhard, Erwin Marti, Werner Schreiber, Josef Zelger
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Patent number: 6080208Abstract: The present invention provides new stilbene compounds which are useful as fluorescent whitening agents (FWAs), imparting high whiteness levels to textile fibre material treated with them, and which also impart a high sun protection factor (SPF) to textile fibre material treated with them. The present invention also concerns a method of imparting a high whiteness level and a high sun protection factor to textile fibre material, especially cotton, polyamide and wool, comprising treating the textile material with the new compounds.Type: GrantFiled: December 22, 1998Date of Patent: June 27, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Dieter Reinehr, Georges Metzger, Hanspeter Sauter
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Patent number: 5718728Abstract: This invention relates to a method for strengthening a cellulosic substrate by treating the substrate with a formaldehyde-free curable aqueous composition and curing the composition. The cellulosic substrates include, for example, paper oil- and air-filter stock, rayon nonwoven wipes, cellulosic laminating stock, cotton woven fabrics, and wood flakes suitable to be consolidated into flakeboard.Type: GrantFiled: August 26, 1996Date of Patent: February 17, 1998Assignee: Rohm and Haas CompanyInventors: Charles Thomas Arkens, Scott Lind Egolf, Robert David Gleim, Oscar Hsien-Hsiang Hsu, Kenneth John Wiesinger
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Patent number: 5238648Abstract: A hermetic enclosure assembly, having utility for preservational storage and/or display of objects susceptible to degradation by exposure conditions such as ultraviolet radiation, visible light, oxygen, humidity, microbial, fungal, and insect species, internal acidity and external acidic gases, and the like. The enclosure assembly includes a gas-impervious housing, a mounting base, and a back cover plate, with an oxygen indicating means in communication with an interior volume of the enclosure assembly, and a slow vapor-released deacidification medium being arranged for dispersing deacidification medium vapor into the interior volume of the enclosure assembly. Also disclosed is an appertaining method of preservationally and protectively enclosing an object for storage and/or display. The invention has particular utility in the storage and/or display of cellulosic objects, which are especially susceptible to embrittlement and decay at low pH conditions, in exposure to visible light, oxygen, and moisture.Type: GrantFiled: June 3, 1992Date of Patent: August 24, 1993Inventor: Irwin Kremen
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Patent number: 5219524Abstract: An article preservation system and method includes an acid-containing article which is contacted with an alkaline substrate material and an artificial atmosphere which is substantially free of gaseous oxygen. The article, alkaline substrate material and artificial atmosphere are hermetically sealed within an interior of a container, at least a portion of the container being at least partially transparent so as to permit viewing of the article from outside the container.Type: GrantFiled: May 7, 1991Date of Patent: June 15, 1993Assignee: Everseal Preservation Labs., Inc.Inventor: Creed M. Evans, II
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Patent number: 5055354Abstract: Transparentized paper, free of residual solvent, is fabricated by coating a web of paper with a solvent-free transparentizing medium, allowing the medium to remain on the paper for a period of time sufficient to saturate part but not all of the thickness of the web, removing the excess transparentizing medium and storing the paper for a period of time sufficient to equilibrate the concentration of transparentizing medium in the thickness of the web. Also included are solvent-free transparentized papers produced by this method.Type: GrantFiled: July 27, 1989Date of Patent: October 8, 1991Assignee: Phomat Reprographics, Inc.Inventor: David R. Simcoke
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Patent number: 4137046Abstract: A transparent cellulosic paper is produced by coating or impregnating a cellulosic paper with an organic solvent solution containing a compound having a weight-average molecular weight of 200 to 2,000 and having at least two isocyanate groups in a molecule or with an organic solvent solution containing, in addition to said compound, at least one compound selected from the group consisting of an aliphatic monohydric alcohol having 6 to 18 carbon atoms and a nonionic surface active agent to the polyethylene glycol type having one hydroxyl group in a molecule, the ratio OH/NCO in the solution being less than 1; removing said organic solvent; and allowing the coated or impregnated paper to harden by aging.Type: GrantFiled: October 4, 1976Date of Patent: January 30, 1979Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Takashi Koike, Masahiro Amano
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Patent number: 4065256Abstract: A shaped article of hydrophobic synthetic polymer is graft polymerized uniformly and economically in a high yield, and consequently is endowed with various advantageous properties, when it is treated in an aqueous emulsified dispersion having dispersed in water an hydrophobic radical polymerization initiator, an organic solvent which is liquid at normal room temperature, naphthalene and an unsaturated monomer containing in the molecular unit thereof at least one double bond capable of radical polymerization.Type: GrantFiled: February 2, 1976Date of Patent: December 27, 1977Assignee: Toyo Boseki Kabushiki KaishaInventors: Kikuji Igeta, Masakatsu Ohguchi