Patents Represented by Attorney, Agent or Law Firm Howard J. Troffkin
  • Process of making a battery separator
    Patent number: 5240655
    Abstract: A process of having a microporous multiply sheet product which is capable of becoming non-porous at a predetermined elevated transformation temperature is formed by first forming a non-porous, multiply initial sheet product having at least one first ply and at least one second ply, each with its own viscosity profile. The initial sheet product is then stretched and annealed to impart porosity to the sheet product.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: August 31, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Howard J. Troffkin, Burton M. Rein, Robert M. Spotnitz, Richard T. Giovannoni, Yihong Guo
  • Additive composition for cement admixture
    Patent number: 5223036
    Abstract: A cement admixture is disclosed which is capable of inhibiting slump loss without set retardation to hydraulic cement compositions. The admixture is composed of a mixture comprising a copolymer of maleic anhydride and an oxyalkylene containing monomer, lignosulfonic acid or its salts and an anionic surfactant.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: June 29, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Hideo Koyata, Tomoyuki Tsutsumi
  • Hydration retarder
    Patent number: 5215585
    Abstract: A method of reclaiming unset cement compositions by mixing a polymethoxy polyphosphonate to the unset composition to cause long-term retardation of cement hydration and subsequently treating the composition with a set accelerator to reinitiate hydration.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: June 1, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Narender P. Luthra, Charles G. Carter, Paul C. Scheiner
  • Processing additive for high-pressure roll press process of forming finish grind cement
    Patent number: 5203512
    Abstract: An improved high-pressure roll press process for forming finish ground cement is disclosed and is achieved by treating the material entering the roll press with a small amount of a hydroxyl or alkoxyl compound selected from lignin, phenol or monopropylene glycol or mixtures thereof.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: April 20, 1993
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chiara F. Ferraris, Ellis M. Gartner, David F. Myers
  • Concrete surface air void reduction admixture
    Patent number: 5180430
    Abstract: A method of reducing the surface voids and imperfections of molded cement structures by forming the cement composition with an admixture comprising a combination of Welan Gum and a water reducing agent.
    Type: Grant
    Filed: October 16, 1991
    Date of Patent: January 19, 1993
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, Chiara F. Ferraris
  • Air-detrainer for hydraulic cement compositions
    Patent number: 5156679
    Abstract: A hydraulic cement admixture capable of air detrainment to structures formed therefrom comprising water-soluble alkylated alkanolamine salts.
    Type: Grant
    Filed: August 12, 1991
    Date of Patent: October 20, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, David F. Myers
  • Cathodic electrode
    Patent number: 5143805
    Abstract: A polymer bonded sheet product suitable for use as an electrode in a non-aqueous battery system wherein the electrode is a microporous sheet composed of from 2-30 weigth percent polyethylene, 70-98 weight percent of electrically conductive and electrochemically active particulate material and from 0 to 5 weight percent of a plasticizer for the polyethylene.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: September 1, 1992
    Assignee: W. R. Grace & Co.-Conn:
    Inventors: Menahem Anderman, Steven L. Johnson, Michael C. Saft, David Zuckerbrod
  • Concrete primer for polyester coatings
    Patent number: 5120574
    Abstract: A process for applying and providing an enhanced polyester-based polymer concrete overlay on a porous substrate structure is provided. The process requires first applying a monomeric high-molecular weight acrylate- or methacrylate-based pretreatment composition to the substrate and then forming the polyester-based polymer concrete overlay over the treated substrate.
    Type: Grant
    Filed: February 27, 1991
    Date of Patent: June 9, 1992
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Joseph A. Cogliano, James M. Gaidis
  • Novel cement additives and hydraulic cement mixes containing them
    Patent number: 5102467
    Abstract: A hydraulic cement admixture capable of enhancing the latter stage set strength of the cured composition comprising certain mono- and disubstituted (dialkanolaminomethyl) phenols.
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: April 7, 1992
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, Robert P. Kreh
  • Strength enhancing additive for certain portland cements
    Patent number: 5084103
    Abstract: This invention relates to a method of producing enhanced strength portland cements. Under the process of this invention, certain portland cements, in particular those containing at least 4% C.sub.4 AF and up to 0.2% of a strength enhancing additive comprising triisopropanolamine, exhibit a marked increase in 7 and 28 day compressive strength. The triisopropanolamine strength enhancing additive may be admixed with cement powder or may be interground as a grinding aid with cement clinker during finish milling.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: January 28, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: David F. Myers, Ellis M. Gartner
  • Polymer surface modification using aqueous stable diazo solution
    Patent number: 5075427
    Abstract: The present invention is directed to aqueous compositions of organic diazo compounds which are capable of being readily handled in commercial applications and to the surface modification of polymeric substrates utilizing the subject diazo composition.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: December 24, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Uan G. Kang, Joseph W. Raksis, Clifton L. Kehr, Clifford A. Ferrin, Jr.
  • Method of inhibiting corrosion and scale formation in aqueous systems
    Patent number: 5073339
    Abstract: A method of inhibiting corrosion of metal surfaces in contact with aqueous solutions and of inhibiting scale formation thereon is provided by introducing and maintaining in the solution certain polyaminopolyphosphonohydroxybenzene sulfonic acid compounds or their alkali or alkaline earth metal salts.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: December 17, 1991
    Assignee: W. R. Grace & Co. - Conn
    Inventor: Robert P. Kreh
  • Stabilized asphalt
    Patent number: 5053080
    Abstract: A process for stabilizing asphalt is disclosed which requires mixing with the asphalt a stabilizing mixture composed of tall oil acid salts of alkali or alkaline earth metals in combination with free tall oil acid present in at least 30 molar percent of the total acid content.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: October 1, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: James M. Gaidis
  • Mono- and di-substituted (diphosphonoalkylamino methyl)-4-hydroxybenzenesulfonic acid
    Patent number: 5043099
    Abstract: New polyamino-polyphosphonic-hydroxybenzenesulfonic acid compounds as the free acid or their alkali or alkaline earth metal salt. Specifically, the compounds are the mono- and di-(1,1-diphosphono-1-alkylaminomethyl)-4-hydroxybenzenesulfonic acid. These compounds are useful as corrosion inhibiting agents for metal/water applications.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: August 27, 1991
    Inventors: Robert P. Kreh, Charles G. Carter
  • Halogen generation
    Patent number: 5039383
    Abstract: A process for forming halogen of chlorine and/or bromine by subjecting aqueous hydrohalic acid electrolyte solution to an electrical current while providing a continuous flow of inert gas through the solution and maintaining the solution at a substantially invariant level and composition.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: August 13, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Robert M. Spotnitz, Douglas S. McFarland
  • Treating concrete structures to inhibit corrosion by heating the structure, cooling same under controlled temperature gradient, and applying an inhibiting agent to an internal portion of the structure
    Patent number: 5039556
    Abstract: A method of posttreating a concrete structure to provide corrosion inhibiting properties by heating the structure to remove entrapped water, cooling the structure under a maximum temperature gradient of +2.degree. C./in. thickness, applying an aqueous solution of corrosion inhibitor and then an aqueous wash.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: August 13, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Joseph A. Cogliano, Arnold M. Rosenberg
  • Sprayable fireproofing composition
    Patent number: 5034160
    Abstract: A sprayable fireproofing composition comprising a hydratable cementitious binder, a porous aggregate, a fibrous material, an air-entraining agent and a rheopectic agent selected from granular attapulgite, sepiolite or mixture thereof having a major amount of particulate greater than 40 microns and water content less than 16 percent.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: July 23, 1991
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Lawrence J. Kindt, James M. Gaidis, Joseph M. Daly
  • Synthesis of thioglycolic acid
    Patent number: 5023371
    Abstract: A process for forming thioglycolic acid by contacting in a reaction zone at elevated pressure of at least 250 psig a mixture of monochloroacetic acid and dichloroacetic acid with a molar excess of an alkali metal hydrosulfide to form the alkali metal salt of thioglycolic acid, acidifying said salt and removing the free thioglycolic acid. A preferred process further requires separating any formed thiodiglycolic acid from the resultant liquid phase materials and recycling said acid to the reaction zone.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: June 11, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Mosum E. Tsui, Martin B. Sherwin
  • Deblocking N-formyl aspartame compounds
    Patent number: 5017690
    Abstract: N-formyl amino acid or peptide is deformylated by reaction with aniline or methylene dianiline over noble metal catalyst, e.g., Pt-on-carbon. N-formanilide is formed as by-product. The process is particularly useful in deformylating N-formyl aspartame.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: May 21, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Jennifer M. Quirk
  • Processing additives for blended cements
    Patent number: 5017234
    Abstract: This invention relates to a method of enhancing the later age strength of certain blended cements. Under the process of this invention, certain blended cements, in particular those made from cement clinkers containing at least 4% C.sub.4 AF, when mixed with up to 0.2% of a higher trialkanolamine exhibit a marked increase in 7 and 28-day compressive strengths. The blended cements of this invention contain between 5 and 80% fillers or clinker substitutes. The higher trialkanolamine strength enhancing additive may be admixed with the cement powder or may be interground with the cement clinker during finish milling.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: May 21, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ellis M. Gartner, David F. Myers, James M. Gaidis