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: 20110114564
    Abstract: 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: Application
    Filed: July 6, 2009
    Publication date: May 19, 2011
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Zahid Amjad, Robert W. Zuhl
  • Publication number: 20030228272
    Abstract: 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: Application
    Filed: March 26, 2003
    Publication date: December 11, 2003
    Inventors: Zahid Amjad, Archish Desai
  • Patent number: 6361768
    Abstract: 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: Grant
    Filed: December 29, 1998
    Date of Patent: March 26, 2002
    Assignee: PMD Holdings Corp.
    Inventors: Ramiro Galleguillos, Jodi A. Budrevich, Joseph A. Chiarelli, Harinath B. Bathina, Zahid Amjad
  • Patent number: 6297337
    Abstract: 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: Grant
    Filed: May 19, 1999
    Date of Patent: October 2, 2001
    Assignee: PMD Holdings Corp.
    Inventors: Nancy S. Marchant, Simon Hsaio-Pao Yu, Zahid Amjad
  • Patent number: 5658465
    Abstract: 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: Grant
    Filed: December 28, 1995
    Date of Patent: August 19, 1997
    Assignee: The B.F. Goodrich Company
    Inventors: Paul Peter Nicholas, Zahid Amjad
  • Patent number: 5468797
    Abstract: 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: Grant
    Filed: November 29, 1994
    Date of Patent: November 21, 1995
    Assignee: The B. F. Goodrich Company
    Inventors: Daniel J. Adams, Zahid Amjad, Solomon Lemma, Carl J. Long, II
  • Patent number: 5373044
    Abstract: 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: Grant
    Filed: February 17, 1994
    Date of Patent: December 13, 1994
    Assignee: The B. F. Goodrich Company
    Inventors: Daniel J. Adams, Zahid Amjad, Solomon Lemma, Carl J. Long, II
  • Patent number: 5349030
    Abstract: 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: Grant
    Filed: November 23, 1993
    Date of Patent: September 20, 1994
    Assignee: The B. F. Goodrich Company
    Inventors: Carl J. Long, II, Zahid Amjad, William F. Masler, III, William H. Wingo
  • Patent number: 5288814
    Abstract: 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: Grant
    Filed: August 26, 1992
    Date of Patent: February 22, 1994
    Assignee: The B. F. Goodrich Company
    Inventors: Carl J. Long, II, Zahid Amjad, William F. Masler, III, William H. Wingo
  • Patent number: 5023001
    Abstract: 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: Grant
    Filed: August 23, 1989
    Date of Patent: June 11, 1991
    Assignee: The B. F. Goodrich Company
    Inventors: Zahid Amjad, William F. Masler, III
  • Patent number: 4960522
    Abstract: 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: Grant
    Filed: August 30, 1989
    Date of Patent: October 2, 1990
    Assignee: The B. F. Goodrich Company
    Inventors: Zahid Amjad, William F. Masler
  • Patent number: 4952327
    Abstract: 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: Grant
    Filed: August 23, 1988
    Date of Patent: August 28, 1990
    Assignee: The B. F. Goodrich Company
    Inventors: Zahid Amjad, William F. Masler
  • Patent number: 4952326
    Abstract: 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: Grant
    Filed: August 23, 1988
    Date of Patent: August 28, 1990
    Assignee: The B. F. Goodrich Company
    Inventors: Zahid Amjad, William F. Masler
  • Patent number: 4915937
    Abstract: 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: Grant
    Filed: August 1, 1988
    Date of Patent: April 10, 1990
    Assignee: The BF Goodrich Company
    Inventor: Zahid Amjad
  • Patent number: 4895658
    Abstract: 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: Grant
    Filed: June 15, 1987
    Date of Patent: January 23, 1990
    Assignee: The B. F. Goodrich Company
    Inventor: Zahid Amjad
  • Patent number: 4892724
    Abstract: 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: Grant
    Filed: May 9, 1988
    Date of Patent: January 9, 1990
    Assignee: The B. F. Goodrich Company
    Inventor: Zahid Amjad
  • Patent number: 4892725
    Abstract: 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: Grant
    Filed: May 9, 1988
    Date of Patent: January 9, 1990
    Assignee: The B. F. Goodrich Company
    Inventor: Zahid Amjad
  • Patent number: 4889637
    Abstract: 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: Grant
    Filed: August 23, 1988
    Date of Patent: December 26, 1989
    Inventors: Zahid Amjad, William F. Masler
  • Patent number: 4885097
    Abstract: 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: Grant
    Filed: August 23, 1988
    Date of Patent: December 5, 1989
    Assignee: The B. F. Goodrich Company
    Inventors: Zahid Amjad, William F. Masler
  • Patent number: 4842847
    Abstract: 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: Grant
    Filed: December 21, 1987
    Date of Patent: June 27, 1989
    Assignee: The B. F. Goodrich Company
    Inventor: Zahid Amjad