Patents by Inventor Thomas G. Majewicz
Thomas G. Majewicz 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: 9643031Abstract: The present invention relates to polygalactomannan compositions, and more particularly cationic guar gum compositions, which, when crosslinked with glyoxal, from discrete guar particles which are capable of being easily dispersed in water which permits subsequent processing of the guar, such as washing. The guar and its derivatives are desirable for use in applications such as personal care, household care products and the like.Type: GrantFiled: November 2, 2007Date of Patent: May 9, 2017Assignee: HERCULES LLCInventors: Anita N. Chan, Paquita Erazo-Majewicz, Gijsbert Kroon, Thomas G. Majewicz
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Patent number: 8173799Abstract: A composition of a loose mass of comminuted raw cotton linter fibers has a bulk density of at least 8 g/100 ml and at least 50% of the fibers in the mass passes through a US standard sieve size #10 (2 mm opening). This composition is made by obtaining a loose mass of first cut, second cut, third cut, or mill runs raw cotton linters or mixtures thereof and comminuting the loose mass of raw cotton linters to a size wherein at least 50% pass through a US standard sieve size #10 (2 mm opening). This composition is used to make cellulose ether derivatives.Type: GrantFiled: April 13, 2004Date of Patent: May 8, 2012Assignee: Hercules IncorporatedInventors: Paul C Gillette, Thomas G. Majewicz, Arjun C. Sau
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Patent number: 5290829Abstract: A purified hydroxyethylcellulose (HEC) or hydroxypropylcellulose (HPC) reacts with a perfluorinated alkyl glycidyl ether to produce an associative thickener wherein a fluorinated C.sub.8 chain is nearly as effective as a hydrocarbyl C.sub.16 straight chain hydrophobe. A preferred glycidyl ether is prepared by reacting a terminal hydroxyl of a perfluorinated surfactant with epichlorohydrin.Type: GrantFiled: April 2, 1992Date of Patent: March 1, 1994Assignee: Aqualon CompanyInventors: John D. Angerer, Thomas G. Majewicz, Makram H. Meshreki
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Patent number: 5124445Abstract: Cellulose ethers are disclosed which have sufficient nonionic substitution to render them water soluble and which are further modified with a C.sub.10 to C.sub.24 long chain alkylaryl group in an amount between 0.2% by weight and the amount which makes them less than 1% by weight soluble in water. Hydroxyethylcellulose is a preferred water soluble cellulose ether for modification according to the invention. These products exhibit substantially improved viscosifying effects compared to their unmodified cellulose ether counterparts, and provide good leveling and sag resistance in latex paints. Preferred alkylaryl groups are nonylphenyl, dodecylphenyl, and dinonylphenyl. Included are cellulose ethers with spacer groups of various lengths between the alkylaryl group and the connecting group to the cellulose molecule.Type: GrantFiled: May 17, 1991Date of Patent: June 23, 1992Assignee: Aqualon CompanyInventors: Ernst K. Just, Thomas G. Majewicz, Arjun C. Sau
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Patent number: 5120838Abstract: Cellulose ethers are disclosed which have sufficient nonionic substitution to render them water soluble and which are further modified with a C.sub.10 to C.sub.24 long chain alkylaryl group in an amount between 0.2% by weight and the amount which makes them less then 1% by weight soluble in water. Hydroxyethylcellulose is a preferred water soluble cellulose ether for modification according to the invention. These products exhibit substantially improved viscosifying effects compared to their unmodified cellulose ether counterparts, and provide good leveling and sag resistance in latex paints. Preferred alkylaryl groups are nonylphenyl, dodecylphenyl, and dinonylphenyl. Included are cellulose ethers with spacer groups of various lengths between the alkylaryl group and the connecting group to the cellulose molecule.Type: GrantFiled: October 30, 1989Date of Patent: June 9, 1992Assignee: Aqualon CompanyInventors: Ernst K. Just, Thomas G. Majewicz, Arjun C. Sau
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Patent number: 4994112Abstract: Hydroxyalkylcellulose hydrophobically modified with a C12 to C16 alkyl or aralkyl group represents a preferred thickener for a paper coating composition to obtain uniform coating at high speed. The process for manufacture involves: preparing an aqueous coating composition of hydrophobically modified hydroxyethylcellulose, pigment binder and other additives; applying the composition to a paper surface; removing excess composition to produce a uniform coating; and drying to produce a paper product.Type: GrantFiled: October 30, 1989Date of Patent: February 19, 1991Assignee: Aqualon CompanyInventors: Thomas G. Majewicz, Teng-Shau Young
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Patent number: 4523010Abstract: Disclosed are nonionic dihydroxypropyl hydroxyalkylcelluloses having a dihydroxypropyl M.S. of from about 0.1 to 1.2 and a hydroxyalkyl M.S. of from about 1.5 to about 3.0. The dihydroxypropyl hydroxyalkylcelluloses are capable of reacting with polyvalent metal cations, such as, titanium and zirconium, in an aqueous medium, such as a salt brine medium, to form viscoelastic gels useful in oil recovery operations.Type: GrantFiled: June 15, 1984Date of Patent: June 11, 1985Assignee: Hercules IncorporatedInventors: Carl Lukach, Thomas G. Majewicz, Albert R. Reid
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Patent number: 4486335Abstract: A water-soluble carboxymethyl hydroxyethyl cellulose having a carboxymethyl degree of substitution of about 0.1 to about 0.25, preferably of about 0.15 to about 0.20, and having a hydroxyethyl molar substitution of greater than about 1.0 possesses unexpected qualities. When this composition is crosslinked with a suitable aluminum ion in an aqueous solution it forms a gel which exhibits no significant thinning at temperatures less than about 200.degree. F.Type: GrantFiled: August 30, 1982Date of Patent: December 4, 1984Assignee: Hercules IncorporatedInventor: Thomas G. Majewicz
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Patent number: 4400502Abstract: Anionic, water-soluble cellulose ethers which are treated with a mixture of glyoxal and a sodium borate, preferably borax, readily disperse in aqueous solutions without clumping or agglomerating. These treated compounds can be formed by contacting an organic slurry of an anionic, water-soluble cellulose ether with an aqueous solution of glyoxal and a sodium borate, recovering the product and then drying it.Type: GrantFiled: April 27, 1982Date of Patent: August 23, 1983Assignee: Hercules IncorporatedInventor: Thomas G. Majewicz
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Patent number: 4336146Abstract: Thickening of heavy brine solutions based on calcium halides by use of water-insoluble hydroxyethyl cellulose is disclosed.Type: GrantFiled: August 25, 1980Date of Patent: June 22, 1982Assignee: Hercules IncorporatedInventors: Thomas G. Majewicz, Thomas J. Podlas
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Patent number: 4309535Abstract: Easily dispersible anionic water-soluble polymers are disclosed which are prepared by lightly treating particulate water-soluble polymer with a water-soluble aluminum salt and an aluminum chelant. Rate of hydration is retarded when the particles are added to aqueous media, allowing the particles to be dispersed completely before their surfaces hydrate sufficiently to gel and prevent complete dissolution.Type: GrantFiled: September 5, 1980Date of Patent: January 5, 1982Assignee: Hercules IncorporatedInventor: Thomas G. Majewicz
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Patent number: 4306061Abstract: Solution qualities of carboxymethyl cellulose are improved by preparing the same with cellulose which has been alkalized in the presence of a borate ion-containing salt.Type: GrantFiled: December 29, 1980Date of Patent: December 15, 1981Assignee: Hercules IncorporatedInventor: Thomas G. Majewicz
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Patent number: 4298728Abstract: In preparation of hydroxyethyl ethers of cellulose, ethylene oxide efficiency of the reaction and solubility characteristics of the product are improved by using alkali cellulose which has been prepared in the presence of boric acid or a boric acid salt.Type: GrantFiled: June 3, 1980Date of Patent: November 3, 1981Assignee: Hercules IncorporatedInventors: Thomas G. Majewicz, Walter S. Ropp
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Patent number: T103401Abstract: Carboxymethyl cellulose is not normally considered a good candidate as a thickener for fracturing fluids for subterranean formations due to the poor salt sensitivity of its solutions. It has been found that if carboxymethyl cellulose is modified with hydroxyethyl functionality, the salt sensitivity of its aqueous solutions is improved to a point where it can be used in this application. Specifically, carboxymethyl hydroxyethyl cellulose having carboxymethyl D.S. of 0.7 to 1 and hydroxyethyl M.S. of 0.3 to 2 can be so employed.Type: GrantFiled: December 13, 1982Date of Patent: September 6, 1983Inventor: Thomas G. Majewicz
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Patent number: T104401Abstract: Carboxymethyl cellulose has not heretofore been universally useful as a thickener for drilling muds due to sensitivity of its aqueous solutions to the high level of inorganic salts contained in such muds. The inclusion in the carboxymethyl cellulose of hydroxyethyl functionality reduces this salt sensitivity to a level where it can be employed to thicken drilling muds, even those containing calcium salts. Carboxymethyl hydroxyethyl cellulose of carboxymethyl D.S. of 0.1 to 1.0 and hydroxyethyl M.S. of 0.5 to 2.5 are useful.Type: GrantFiled: December 9, 1982Date of Patent: July 3, 1984Inventor: Thomas G. Majewicz
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Patent number: T104402Abstract: Thickening of heavy brine solutions based on calcium halides by use of carboxymethyl hydroxyethyl cellulose is disclosed wherein the carboxymethyl substitution level is about 0.05 to 0.35.Type: GrantFiled: December 20, 1982Date of Patent: July 3, 1984Inventor: Thomas G. Majewicz
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Patent number: RE34904Abstract: Cellulose ethers are disclosed which have sufficient nonionic substitution to render them water soluble and which are further modified with a C.sub.10 to C.sub.24 long chain alkylaryl group in an amount between 0.2% by weight and the amount which makes them less than 1% by weight soluble in water. Hydroxyethylcellulose is a preferred water soluble cellulose ether for modification according to the invention. These products exhibit substantially improved viscosifying effects compared to their unmodified cellulose ether counterparts, and provide good leveling and sag resistance in latex paints. Preferred alkylaryl groups are nonylphenyl, dodecylphenyl, and dinonylphenyl. Included are cellulose ethers with spacer groups of various lengths between the alkylaryl group and the connecting group to the cellulose molecule.Type: GrantFiled: July 8, 1993Date of Patent: April 11, 1995Assignee: Hercules IncorporatedInventors: Ernst K. Just, Thomas G. Majewicz, Arjun C. Sau