Patents by Inventor Carlos A. Piedrahita

Carlos A. Piedrahita 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: 20130202970
    Abstract: The present invention relates to inherently electrostatic dissipative polymers, such as thermoplastic urethanes (TPU), and compositions thereof. The present invention provides a composition comprising: (a) an inherently dissipative polymer and (b) a halogen-free metal salt of an amidoalkanesulfonic acid, a hydrocarbyl-substituted benzenesulfonic acid, or a mixture thereof, or a polymer derived therefrom. The invention also provides a shaped polymeric article comprising the inherently dissipative polymer compositions described herein. The invention also provides a process of making the inherently dissipative polymer compositions described herein. The process includes the step of mixing a halogen-free metal-containing salt into an inherently dissipative polymer.
    Type: Application
    Filed: October 26, 2011
    Publication date: August 8, 2013
    Applicant: LUBRIZOL ADVANCED MATERIALS, INC.
    Inventors: Qiwei Lu, Carlos A. Piedrahita, Yona Eckstein, James M. Ludlow, III
  • Publication number: 20080241371
    Abstract: A highly water resistant coating is described for use as a temporary protective or tinting finish for a wide variety of personal items, including one's vehicle and tires. The film forming polymer of the coating is desirable as it can be applied with polar solvents but then upon evaporation of a solubilizing additive becomes water resistant or water proof. Thereafter if a similar solubilizing additive is used in a polar solvent, the coating can be removed without damaging the surface of the substrate.
    Type: Application
    Filed: January 27, 2005
    Publication date: October 2, 2008
    Applicant: THE LUBRIZOL CORPORATION
    Inventors: Kathleen O. Havelka, William P. Taylor, Carlos A. Piedrahita, Constance F. Williams, Robert N. Sole, Gilbert R. Malone, Okson Yi
  • Publication number: 20080107797
    Abstract: A coating for sensor transducers that transmit a signal to—and/or receive a signal from—a fluid, either liquid or gas, in contact with the transducer. In particular the coating minimizes or eliminates fouling of the transducer surface by the fluid, reducing the need for transducer maintenance, while not interfering with the transducer's ability to send and/or receive signals.
    Type: Application
    Filed: November 20, 2006
    Publication date: May 8, 2008
    Inventors: Joseph W. Pialet, Carlos A. Piedrahita, William P. Taylor
  • Patent number: 7297408
    Abstract: A coating for sensor transducers that transmit a signal to—and/or receive a signal from—a fluid, either liquid or gas, in contact with the transducer. In particular the coating minimizes or eliminates fouling of the transducer surface by the fluid, reducing the need for transducer maintenance, while not interfering with the transducer's ability to send and/or receive signals.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: November 20, 2007
    Assignee: The Lubrizol Corporation
    Inventors: Joseph W. Pialet, Carlos A. Piedrahita, William P. Taylor
  • Publication number: 20060105101
    Abstract: A coating for sensor transducers that transmit a signal to—and/or receive a signal from—a fluid, either liquid or gas, in contact with the transducer. In particular the coating minimizes or eliminates fouling of the transducer surface by the fluid, reducing the need for transducer maintenance, while not interfering with the transducer's ability to send and/or receive signals.
    Type: Application
    Filed: November 16, 2004
    Publication date: May 18, 2006
    Inventors: Joseph Pialet, Carlos Piedrahita, William Taylor
  • Publication number: 20030065058
    Abstract: The present invention provides a method and use of incorporating water soluble or water dispersible polymer(s), stabilized in an invert (water-in-oil) emulsion, into an oil continuous metalworking emulsifiable concentrate, which is then diluted with water to form an end use oil-in-water emulsion. According to the present invention, the invert polymer emulsion (A) is added to the metalworking emulsifiable concentrate (B) to embed at least one water soluble or water dispersible polymer into the metalworking emulsifiable concentrate, to form a stable, emulsifiable concentrate (C). The stable, emulsifiable concentrate (C) is then diluted with water to form an end use oil-in-water emulsion (D) causing the water soluble or water dispersible polymer in the end use emulsion to impart antimist performance.
    Type: Application
    Filed: September 18, 2002
    Publication date: April 3, 2003
    Inventors: Carlos A. Piedrahita, Ping Y. Zhu
  • Patent number: 6372842
    Abstract: The present invention relates to methods of using an aqueous composition or dispersion containing a water-soluble or water-dispersible synthetic polymer, and compositions formed thereof. The aqueous composition or dispersion is added to agricultural spray compositions, ink compositions, deicing or anti-icing compositions, latex paint and coating compositions, cleaner compositions, adhesives, fire-extinguishing chemical compositions, hydro-metallurgy/electro-winning compositions, compositions having organosilanes, personal care compositions, water-based hydraulic compositions, dust control compositions, and textile finish compositions, to impart properties including aerosol control, spatter control, shear stability, rheology control, transfer efficiency, oil/water reduction, sling control, emollient performance, film forming capability, surface activity, encapsulent ability, lubricity, thickening, and anti-wear capability, to the resultant composition formed thereof.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: April 16, 2002
    Assignee: The Lubrizol Corporation
    Inventors: Bryan A. Grisso, Robert E. Quinn, Sanjay N. Kalhan, Edward J. Konzman, Saurabh S. Lawate, James H. Bush, Joseph W. Pialet, Paul Walsh, Carlos A. Piedrahita, Philip R. Miller, Alan C. Clark, David L. Facchiano, Al E. Haas, Clifford Kowall, Richard A. Denis
  • Patent number: 5501809
    Abstract: An electrorheological fluid is prepared from a hydrophobic liquid medium and a dispersed particulate phase of (i) a polar solid material which is capable of exhibiting electrorheological activity in the presence of a low molecular weight polar material and (ii) a non-cellulosic polymeric material having a solubility parameter of about 15 to about 50 (MPa).sup.1/2 and exhibiting substantially no electrorheological activity in the absence of a low molecular weight polar material. The fluid optionally contains a low molecular weight polar activator. The fluid has good electrorheological performance over a broad temperature range.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: March 26, 1996
    Assignee: The Lubrizol Corporation
    Inventors: Barton J. Schober, Carlos A. Piedrahita, Joseph W. Pialet
  • Patent number: 5115083
    Abstract: The present invention relates to a curable composition comprising:(A) at least one aminoplast resin; and(B) an amount effective to cure the composition of at least one catalyst selected from the group consisting of(B-1) an acid, or an anhydride, ester, ammonium salt or metal salt of the acid that is represented by one of the formulae ##STR1## (B-2) an acid, or an ester, a metal salt or ammonium salt of a sulfo compound represented by the formula: ##STR2## (B-3) an acid, or an ammonium or metal salts of a reaction product prepared by the reaction of at least one amine and sulfo compound of (B-2); and mixtures thereof;where in Formulae I and IIeach R.sub.1 and R.sub.2 is independently a hydrocarbyl, hydrocarbyloxy or hydrocaryltho group;where in Formulae I, II and IIIX.sub.1 and X.sub.2 are each independently sulfur or oxygen;R.sub.3 is a divalent hydrocaryl group,each R.sub.4 and R.sub.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: May 19, 1992
    Assignee: The Lubrizol Corporation
    Inventors: Carlos A. Piedrahita, Robert E. Quinn, John S. Perz
  • Patent number: 5037533
    Abstract: The present invention relates to an improved process for beneficiating an ore containing sulfide materials with selective rejection of pyrite, pyrrhotite and other minerals and gangue. In particular, the process is useful for beneficiating ores and recovering metals such as copper, lead, zinc, etc., from said ores. In one embodiment the process comprises the steps of:(A) forming a slurry of at least one crushed mineral-containing ore, water and at least one collector which is an acid, or an anhydride, ester, ammonium salt or metal salt of the acid that is represented by the formula ##STR1## wherein each R.sub.1 and R.sub.2 is independently a hydrocarbyl or hydrocarbyloxy or hydrocarbylthio group;each X.sub.1 and X.sub.2 is independently sulfur or oxygen;R.sub.3 is a divalent hydrocarbyl group, hydrogen or hydrocarbyl group;a is 0 or 1;b is 0 or 1;c is 1 or 2;Q is a divalent, trivalent or tetravalent hydrocarbyl group or --C(X.sub.3)NR.sub.5 Q';X.sub.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: August 6, 1991
    Assignee: The Lubrizol Corporation
    Inventors: Carlos A. Piedrahita, Edward P. Richards
  • Patent number: 5025085
    Abstract: The present invention relates to a curable composition comprising:(A) at least one aminoplast resin; and(B) an amount effective to cure the composition of at least one catalyst which is a sulfo acid, or an anhydride, ester, ammonium salt or metal salt of the acid.The sulfo acid can be exemplified by sulfonic acids, such as 2-acrylamido-2-methylpropane sulfonic acid, or a reaction product of the sulfonic acid and a phosphorus acid or salt, such as a dihydrocarbyl phosphorodithioic acid.The catalyst allows curing of aminoplast resins to be accomplished at low temperatures, while imparting a high degree of water resistance to the cured coating.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: June 18, 1991
    Assignee: The Lubrizol Corporation
    Inventors: Carlos A. Piedrahita, Robert E. Quinn, John S. Perz