Patents by Inventor Zahid Amjad
Zahid Amjad 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).
-
Publication number: 20110114564Abstract: A method of inhibiting the deposition of silica and silicate compounds on surfaces in water systems by treating the water with an effective amount of an alkoxylated amines or imidized polymer from alkoxylated amines either alone or in combination with acrylic acid or maleic acid homo- or co-polymers and phosphonates.Type: ApplicationFiled: July 6, 2009Publication date: May 19, 2011Applicant: LUBRIZOL ADVANCED MATERIALS, INC.Inventors: Zahid Amjad, Robert W. Zuhl
-
Publication number: 20030228272Abstract: A novel antidandruff conditioning shampoo comprising a cleansing surfactant, a water-insoluble antidandruff and/or anti-itching agent, a conditioning agent, a natural oil, and a suitable carrier, and a method of treating hair are disclosed. The shampoo compositions effectively suspend the water-insoluble hair treating compound, effectively cleanse the hair and effectively deliver the water soluble and water insoluble hair-treating compounds to the hair and scalp and also effectively condition the hair.Type: ApplicationFiled: March 26, 2003Publication date: December 11, 2003Inventors: Zahid Amjad, Archish Desai
-
Patent number: 6361768Abstract: A novel hydrophilic ampholytic polymer synthesized by reacting polymerizable amino and carboxy functional ethylenically unsaturated monomers, together with a non-ionic hydrophilic monomer, to provide a polymer having a glass transition temperature (Tg) above about 50° C., and optionally hydrophobic monomer(s), and cross-linking monomer(s). The copolymer is precipitated from a polymerization media which includes a suitable organic solvent. The resulting copolymer is in the form of a fine powder, with submicron particle size. As such it is suitable for use as a thickener or rheology modifier in personal care formulations, such as shampoo, conditioner, and the like, as a bioadhesive, and for other pharmaceutical applications.Type: GrantFiled: December 29, 1998Date of Patent: March 26, 2002Assignee: PMD Holdings Corp.Inventors: Ramiro Galleguillos, Jodi A. Budrevich, Joseph A. Chiarelli, Harinath B. Bathina, Zahid Amjad
-
Patent number: 6297337Abstract: Improved crosslinked ionic polymers or salts thereof having a soluble polymer fraction of less than about 15 wt %, and methods for making the same. The polymers are useful as bioadhesives, thickeners, emulsifiers, suspending aids, and pharmaceutical controlled release excipients.Type: GrantFiled: May 19, 1999Date of Patent: October 2, 2001Assignee: PMD Holdings Corp.Inventors: Nancy S. Marchant, Simon Hsaio-Pao Yu, Zahid Amjad
-
Patent number: 5658465Abstract: The present invention relates to a method for inhibiting the formation and deposition of silica and silicate compounds in water systems by the use an effective amount of a polymer or copolymer having the following structure: ##STR1## wherein A is the initiator radical from free radical polymerization, such as for example, alkoxy, acyloxy, hydroxyl, alkyl or sulfonate radicals from peroxide initiators, or cyanoalkyl radicals from azonitrile initiators, or n-alkythio or tetrahydrofuranyl radicals from common transfer agents, R.sub.1 and R.sub.2 are alkyl groups which contain a combined total of 2 to 4 carbon atoms or R.sub.1 and R.sub.2 together with the nitrogen atom comprise a ring containing 3 to 5 carbon atoms, R.sub.3 is either H or a C.sub.1 through C.sub.Type: GrantFiled: December 28, 1995Date of Patent: August 19, 1997Assignee: The B.F. Goodrich CompanyInventors: Paul Peter Nicholas, Zahid Amjad
-
Patent number: 5468797Abstract: A polymeric thickener, emulsifier or suspension aid having improved wettability which is an interpolymer of at least one olefinically unsaturated carboxylic acid containing at least one activated carbon-to-carbon olefinic double bond and at least one carboxyl group, in an amount of more than 15% by weight based upon the weight of the interpolymer, and at least one steric stabilizer surfactant having at least one hydrophilic moiety and at least one hydrophobic moiety and a linear block or a random comb configuration, or mixtures thereof, where the interpolymer has admixed therewith a wetting additive such as a low surface tension surfactant, a glycol, a polyhydric alcohol or mixtures thereof, and a process for dispersing the interpolymer by adding a low surface tension surfactant to the water into which the interpolymer is being dispersed.Type: GrantFiled: November 29, 1994Date of Patent: November 21, 1995Assignee: The B. F. Goodrich CompanyInventors: Daniel J. Adams, Zahid Amjad, Solomon Lemma, Carl J. Long, II
-
Patent number: 5373044Abstract: A polymeric thickener, emulsifier or suspension aid having improved wettability which is an interpolymer of at least one olefinically unsaturated carboxylic acid containing at least one activated carbon-to-carbon olefinic double bond and at least one carboxyl group, in an amount of more than 15% by weight based upon the weight of the interpolymer, and at least one steric stabilizer surfactant having at least one hydrophilic moiety and at least one hydrophobic moiety and a linear block or a random comb configuration, or mixtures thereof, where the interpolymer has admixed therewith a wetting additive such as a low surface tension surfactant, a glycol, a polyhydric alcohol or mixtures thereof, and a process for dispersing the interpolymer by adding a low surface tension surfactant to the water into which the interpolymer is being dispersed.Type: GrantFiled: February 17, 1994Date of Patent: December 13, 1994Assignee: The B. F. Goodrich CompanyInventors: Daniel J. Adams, Zahid Amjad, Solomon Lemma, Carl J. Long, II
-
Patent number: 5349030Abstract: An interpolymer of at least one olefinically unsaturated carboxylic acid containing at least one activated carbon-to-carbon olefinic double bond and at least one carboxyl group, in an amount of more than 15% by weight based upon the weight of the interpolymer, and at least one steric stabilizer surfactant having at least one hydrophilic moiety and at least one hydrophobic moiety and a linear block or a random comb configuration, or mixtures thereof, made by polymerizing olefinically unsaturated carboxylic acid monomers in an organic media, in the presence of free a radical forming catalyst, and the steric stabilizer.Type: GrantFiled: November 23, 1993Date of Patent: September 20, 1994Assignee: The B. F. Goodrich CompanyInventors: Carl J. Long, II, Zahid Amjad, William F. Masler, III, William H. Wingo
-
Patent number: 5288814Abstract: An interpolymer of at least one olefinically unsaturated carboxylic acid containing at least one activated carbon-to-carbon olefinic double bond and at least one carboxyl group, in an amount of more than 15% by weight based upon the weight of the interpolymer, and at least one steric stabilizer surfactant having at least one hydrophilic moiety and at least one hydrophobic moiety and a linear block or a random comb configuration, or mixtures thereof, made by polymerizing olefinically unsaturated carboxylic acid monomers in an organic media, in the presence of free a radical forming catalyst, and the steric stabilizer.Type: GrantFiled: August 26, 1992Date of Patent: February 22, 1994Assignee: The B. F. Goodrich CompanyInventors: Carl J. Long, II, Zahid Amjad, William F. Masler, III, William H. Wingo
-
Patent number: 5023001Abstract: Addition of a secondary scale inhibitor is made to a water medium containing a primary phosphonate scale inhibitor to inhibit precipitation of insoluble calcium phosphonates which are formed by the reaction of calcium in the water medium with the primary scale inhibitor thus forming insoluble calcium phosphonate. The secondary scale inhibitor has the function of inhibiting precipitation of such insoluble calcium phosphonates. The secondary scale inhibitor is a copolymer of an acrylic acid and/or methacrylic acid with one or more of a principal comonomer selected from substituted acrylamides, alkoxyalkyl acrylates, substituted and unsubstituted alkyl acrylates, acrylamido alkane sulfonic acids, hydroxyalkyl acrylates, alkyl itaconates, and mixtures thereof.Type: GrantFiled: August 23, 1989Date of Patent: June 11, 1991Assignee: The B. F. Goodrich CompanyInventors: Zahid Amjad, William F. Masler, III
-
Patent number: 4960522Abstract: Water is treated with copolymers of an acrylic acid and an alkoxyalkyl acrylate ester which are devoid of acrylamide or methacrylamide. The copolymers are effective as scale inhibitors in the presence or absence of metal ions, particularly iron, manganese and zinc; and to stabilize or solubilize soluble metal ions such as iron, manganese, and zinc.Type: GrantFiled: August 30, 1989Date of Patent: October 2, 1990Assignee: The B. F. Goodrich CompanyInventors: Zahid Amjad, William F. Masler
-
Patent number: 4952327Abstract: Inhibition of scale is obtained by adding to an aqueous medium 0.5 to 500 ppm of a copolymer containing at least one of each of the following three monomers:(a) monounsaturated carboxylic acids as well as salts and anhydrides thereof, the acids containing 3 to 5 carbon atoms, such as acrylic acid, methacrylic acid, maleic acid or its anhydride;(b) acrylamidoalkane sulfonic acids and salts thereof, such as 2-acrylamido-2-methylpropane sulfonic acid; and(c) styrene sulfonic acid and its salts.Type: GrantFiled: August 23, 1988Date of Patent: August 28, 1990Assignee: The B. F. Goodrich CompanyInventors: Zahid Amjad, William F. Masler
-
Patent number: 4952326Abstract: Dispersion of particulate matter, especially iron, is obtained by adding to an aqueous medium 0.5 to 500 ppm of a copolymer containing at least one of each of the following three monomer moieties:(a) monounsaturated carboxylic acids as well as salts and anhydrides thereof, the acids containing 3 to 5 carbon atoms, such as an acrylic acid and methacrylic acid;(b) acrylamidoalkane sulfonic acids and salts thereof, such as 2-acrylamido-2-methylpropane sulfonic acid; and(c) primary copolymerizable monomers selected from vinyl alcohol, styrene sulfonic acids and salts thereof, and mixtures thereof.Type: GrantFiled: August 23, 1988Date of Patent: August 28, 1990Assignee: The B. F. Goodrich CompanyInventors: Zahid Amjad, William F. Masler
-
Patent number: 4915937Abstract: Oral compositions and a method for inhibiting tartar on teeth, said compositions comprise a fluoride source, a dental abrasive, and an antihydrolysis agent selected from homopolymers of substituted acrylamides, homopolymers of unsaturated sulfonic acids and salts thereof, and homopolymers and copolymers of cationic monomers. The antihydrolysis agents have molecular weight of 100 to 100,000 and inhibit hydrolysis of polyphosphates to orthophosphates. Whereas polyphosphates generally are effective in inhibiting formation of tartar on teeth, orthophosphates are relatively ineffective.Type: GrantFiled: August 1, 1988Date of Patent: April 10, 1990Assignee: The BF Goodrich CompanyInventor: Zahid Amjad
-
Patent number: 4895658Abstract: This invention pertains to the use of certain acrylic polymers in conjunction with other materials which characterize cleaners of alkaline earth metal scales and metal oxides and hydroxides, particularly citric acid, malic acid, and oxalic acid. Amount of the acrylic polymer is up to 100%, preferably 20 to 80%, based on the weight of a cleaner composition which includes the acrylic polymer. Suitable acrylic polymers are selected from homopolymers of acrylic and methacrylic acids, salts thereof, a copolymers of acrylic and methacrylic acids and salts thereof with 5 to 50% of one or more copolymerizable monomers, the acrylic polymers have molecular weight (M.sub.W) of 500 to 100,000.Type: GrantFiled: June 15, 1987Date of Patent: January 23, 1990Assignee: The B. F. Goodrich CompanyInventor: Zahid Amjad
-
Patent number: 4892724Abstract: Oral compositions and a method for inhibiting tartar on teeth are disclosed herein, said compositions are characterized by the presence of a fluoride source, a dental abrasive, and an anticalculus agent which is an admixture of at least one phosphorus-containing compound and at least one polymer selected from homopolymers of a carboxylic monomer and copolymers containing at least 30% of said carboxylic monomer and at least 5% by weight of a comonomer. The phosphor-containing compound is preferably selected from phosphonic acids and phosphonoalkane carboxylic acids.Type: GrantFiled: May 9, 1988Date of Patent: January 9, 1990Assignee: The B. F. Goodrich CompanyInventor: Zahid Amjad
-
Patent number: 4892725Abstract: Oral compositions and a method for inhibiting dental calculus are disclosed herein, said compositions are characterized by the presence of a flouride source, a dental abrasive, and an anticalculus agent of at least two polymers selected from homopolymers of a carboxy monomer and copolymers containing at least 30% of said carboxyl monomer, said carboxyl monomer is selected from monounsaturated carboxylic acids of 3 to 5 carbons, anhydrides thereof, salts thereof, and mixtures of said carboxyl monomers.Type: GrantFiled: May 9, 1988Date of Patent: January 9, 1990Assignee: The B. F. Goodrich CompanyInventor: Zahid Amjad
-
Patent number: 4889637Abstract: Inhibition of scale is obtained by adding to an aqueous medium 0.5 to 500 ppm of a copolymer containing at least one of each of the following three monomers:(a) monounsaturated carboxylic acids as well as salts and anhydrides thereof, the acids containing 3 to 5 carbon atoms, such as acrylic acid;(b) acrylamidoalkane sulfonic acids and salts thereof, such as 2-acrylamido-2-methylpropane sulfonic acid; and(c) vinyl alcohol.Type: GrantFiled: August 23, 1988Date of Patent: December 26, 1989Inventors: Zahid Amjad, William F. Masler
-
Patent number: 4885097Abstract: Stabilization of metal ions in an aqueous medium is obtained by adding to said aqueous medium 0.5 to 500 ppm of a copolymer containing at least one of each of the following three monomers:(a) acrylic acid, methacrylic acid, and mixtures thereof;(b) acrylamidoalkane sulfonic acids and salts thereof, such as 2-acrylamido-2-methylpropane sulfonic acid; and(c) primary copolymerizable monomers selected from styrene sulfonates.Type: GrantFiled: August 23, 1988Date of Patent: December 5, 1989Assignee: The B. F. Goodrich CompanyInventors: Zahid Amjad, William F. Masler
-
Patent number: 4842847Abstract: Oral compositions and a method for inhibiting dental calculus are disclosed herein, said compositions are characterized by the presence of a fluoride source, a dental abrasive, and an anti-calculus agent selected from polymeric homopolymers of a carboxylic monomer and copolymers thereof containing at least 30% of said carboxylic monomer.Type: GrantFiled: December 21, 1987Date of Patent: June 27, 1989Assignee: The B. F. Goodrich CompanyInventor: Zahid Amjad