Patents Represented by Attorney Walter F. Jewell
  • Patent number: 5236501
    Abstract: A method for manufacturing a cementitious composition comprisinga) uniformally fluidising in a container, particles of a substantially dry powdered cementitious composition by creating aerial motion of the particles by rotational motion perpendicular to the fall of the particles,b) at the same time uniformally spraying the particles with 0.1 to 10 parts by weight (per 100 parts of cementitious composition) of water, optionally containing a cement admixture, andc) mixing the particles and the water intensively by shearing forces.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: August 17, 1993
    Assignee: Sandoz Ltd.
    Inventors: Hiroshi Nomachi, Hiroshi Yokoyama, Shigeki Yoshida, Yoshiro Yoshizaki
  • Patent number: 5203919
    Abstract: Method and compositions for the stabilization (prevention of hardening) of concrete residues in Ready-Mix truck drums.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: April 20, 1993
    Assignee: Sandoz Ltd.
    Inventors: Gregory S. Bobrowski, Robert J. Ryan
  • Patent number: 5192341
    Abstract: In an operation wherein a gaseous stream, such as an air stream, is contacted with a liquid selective solvent for a component of the gaseous stream for the removal of said component from the gaseous stream, improved results are obtain, particularly in a direct gas-liquid countercurrent contacting operation, by employing a liquid selective solvent which has a viscosity of less than about 30 centipoises at 77.degree. F. Suitable such solvents include diethyl phthalate, dioctyl phthalate, dioctyl adipate, acetyltributyl citrate and diisohexyl phthalate, particularly blends or mixtures thereof.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: March 9, 1993
    Assignee: Sandoz Ltd.
    Inventor: Arthur J. Ehrler
  • Patent number: 5176753
    Abstract: A chloride-free admixture for use as a cold weather (e.g., 13.degree. F. to 40.degree. F.) concrete set accelerator. The admixtures comprise;1) at least one soluble inorganic salt having freezing point depressant properties,2) at least one water reducing dispersant, e.g., superplasticizer,3) at least one inorganic early set and strength accelerator, and optionally,4) at least one inorganic set accelerator.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: January 5, 1993
    Inventor: John W. Brook
  • Patent number: 5162402
    Abstract: A polymeric composition which reduces the loss of flowability of a cementitious composition comprises at least one polymer as a salt thereof having the form of a copolymer of(a) a maleic anhydride half-ester with a compound of the formula IRO(AO).sub.m H (I)where R is a C.sub.1-20 alkyl group, A is a C.sub.2-4 alkylene group and m is an integer from 2-16; and(b) a monomer having the formula IICH.sub.2 .dbd.CHCH.sub.2 -(OA).sub.n OR (II)where n is an integer from 1-90.In a preferred embodiment, there is present a polycarboxylate salt which is at least one polymer or copolymer comprising at least one of the monomers acrylic acid, methacrylic acid, maleic anhydride, maleic acid and maleic acid monoester, polymer and polycarboxylate salt being blended in the proportion of 0.1-10 parts of weight of polymer per part of polycarboxylate salt.Cementitious compositions such as concrete in which such polymeric compositions are included maintain their slump properties.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: November 10, 1992
    Assignee: Sandoz Ltd.
    Inventors: Hideo Ogawa, Yoshio Tanaka, Tadashi Tsuchitani
  • Patent number: 5158996
    Abstract: The invention relates to organic copolymers in free acid or salt form with recurring units of formula I ##STR1## in which R is an alkylene radical with 2 to 6 carbon atoms,R.sub.1 is a C.sub.1-20 alkyl-, cycloalkyl- or phenyl group,x, y and z are numbers from 0.01 to 100,m is a number from 1 to 100 andn is a number from 10 to 100,with the provisos, thati) the ratio of x to (y+z) is from 1:10 to 10:1 inclusive,ii) the ratio of z to y is from 3:1 to 100:1, andiii) m+n=15-100.The products of the invention are excellent superplasticizers and can be used as additives to cementitious mixes.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: October 27, 1992
    Assignee: Sandoz Ltd.
    Inventor: Salvatore Valenti
  • Patent number: 5118197
    Abstract: An apparatus and a process for mixing water from a pressurized source and an additive or admixture for a cementitious composition in a mixing chamber comprising introducing, in the form of a jet, water under a first pressure, which is above atmospheric pressure, and introducing the additive under a second pressure between atmospheric pressure and the first pressure, the amount of the additive that is introduced to the mixing chamber being controlled by means regulated by the pressure of water.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: June 2, 1992
    Assignee: Sandoz Ltd.
    Inventor: Peter Ellenberger
  • Patent number: 5098780
    Abstract: Method of enhancing the concrete crack-bridging ability of a corrosion resistant lining for concrete surfaces by applying a crack-bridging basecoat to the concrete surfaces.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: March 24, 1992
    Assignee: Sandoz Ltd.
    Inventors: Bradley R. Nemunaitis, Thomas A. Geriak
  • Patent number: 5094403
    Abstract: A shotcrete gun having a rotatable multichamber rotor, with a top feed hopper for receiving a dry concrete mixture in a chamber, and a bottom outlet pipe for discharging the dry concrete mixture from the chamber. The outlet pipe having a compressed air connector for connection to a compressed air source. The upper surface of the drum rotor adjoins a gasket having one or more openings fixed to a clamping plate. The lower surface of the drum rotor adjoins a gasket which is fixed to a base plate. The hopper and the outlet pipe being spaced such that a chamber which communicates directly with the hopper can be moved so that it no longer communicates with the hopper but communicates with the outlet pipe. The clamping plate has a compressed air connector for blowing the dry mixture out into the outlet pipe.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: March 10, 1992
    Assignee: Sandoz Ltd.
    Inventor: Otto Tschumi
  • Patent number: 5091565
    Abstract: New poly-dicarboxylic acid anhydrides, which are suitable as bio-degradable matrix materials for the controlled release of medicinal agents in humans.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: February 25, 1992
    Assignee: Sandoz Ltd.
    Inventor: Gerd Ziegast
  • Patent number: 5085708
    Abstract: An admixture for ultra-dry-mix concrete is disclosed containing one or more varieties of cement dispersing agents (A) selected from a group consisting of lignosulfonates, oxycarboxylates and polycarboxylates, and in addition, containing one or more varieties of nonionic surface-active agents (B) selected from a group consisting of polyoxyalkylene alkylaryl and alkyl ethers with a hydrophilic-lipophilic balance (HLB-value) of 8 to 17.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: February 4, 1992
    Assignee: Sandoz Ltd.
    Inventors: Yoshitaka Moriya, Hiroshi Nomachi, Makoto Takada, Yukihide Takatsu, Kenichi Umezawa
  • Patent number: 5076501
    Abstract: A shotcrete gun having a rotatable multichamber rotor, with a top feed hopper for receiving a dry concrete mixture in a chamber, and a bottom outlet pipe for discharging the dry concret mixture from the chamber. The outlet pipe having a compressed air connector for connection to a compressed air source. The upper surface of the drum rotor adjoins a gasket having one or more openings fixed to a clamping plate. The lower surface of the drum rotor adjoins a gasket which is fixed to a base plate. The hopper and the outlet pipe being spaced such that a chamber which communicates directly with the hopper can be moved so that it no longer communicates with the hopper but communicates with the outlet pipe. The clamping plate has a compressed air connector for blowing the dry mixture out into the outlet pipe, and at least three pressure cylinders in order to press the gasket against the drum rotor. Means are provided for maintaining the pressure in the cylinders proportional to the pressure in the outlet pipe.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 31, 1991
    Assignee: Sandoz Ltd.
    Inventor: Otto Tschumi
  • Patent number: 5069822
    Abstract: A protective coating for application to steel reinforced concrete structures, comprising a liquid composition of elastomeric polymeric material having electrically conductive particulate matter evenly dispersed therein. A cathodic protection system embodying the coating comprises a moisture impervious membrane of elastomeric polymeric material having electrically conductive particulate material evenly dispersed therein, an electrically conductive grid embedded in the membrane or contiguous thereto, and direct current means connecting the grid electrically with the reinforcing bars.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: December 3, 1991
    Inventors: Thomas M. Callaghan, Vallabhdas M. Pasta, Vasant D. Kale, Charles A. Bruce
  • Patent number: 5069911
    Abstract: A controlled release formulation for oral administration comprisinga 9,10-dihydro ergot alkaloid,a pharmaceutically acceptable hydrophilic swelling substance anda pharmaceutically acceptable inert fatty material.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: December 3, 1991
    Assignee: Sandoz Ltd.
    Inventor: Othmar Zuger
  • Patent number: 4988512
    Abstract: Solid nasal inserts of calcitonin and other peptides have particularly interesting drug absorption profiles.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: January 29, 1991
    Assignee: Sandoz Ltd.
    Inventor: Moise Azria
  • Patent number: 4964917
    Abstract: A method of reclaiming leftover ready-mix concrete comprising the steps of:(1) retarding the hydration of the unused portion of concrete returned from a job site; and(2) after the desired retarded period adding a hydration acceleration agent to restore the concrete to a settable state.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: October 23, 1990
    Assignee: Sandoz Ltd.
    Inventors: Gregory S. Bobrowski, Gregory C. J. Guecia, David A. Lupyan, Frederick D. Kinney
  • Patent number: 4933105
    Abstract: Microspheres, prepared by solvent removal from an oil-in-water emulsion using carboxylic acid salt surfactant, e.g., sodium oleate as the emulsifier.
    Type: Grant
    Filed: May 13, 1988
    Date of Patent: June 12, 1990
    Assignee: Sandoz Pharm. Corp.
    Inventor: Jones W. Fong
  • Patent number: D312321
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: November 20, 1990
    Assignee: Sandoz Pharm. Corp.
    Inventor: Nicholas Calandrillo
  • Patent number: D312322
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: November 20, 1990
    Assignee: Sandoz Pharm. Corp.
    Inventor: Nicholas Calandrillo
  • Patent number: RE34239
    Abstract: A semi-permeable membrane .[.which comprises.]. .Iadd.having high permeability characteristics is disclosed. This may comprise .Iaddend.either(i) a copolymer of acrylonitrile and at least one ionic or ionizable monomer, or(ii) a copolymer of acrylonitrile, at least one ionic or ionizable monomer, and at least one non-ionic and non-ionizable monomer, or(iii) a mixture of at least two copolymers as defined under (i) and/or (ii), or(iv) a mixture of at least one copolymer as defined under (i) and/or (ii), and at least one copolymer of acrylonitrile and at least one non-ionic and non-ionizable monomer, the ionic or ionizable monomer units representing from 1 to 80 mole % of the monomer units in one of said copolymers, and representing from 1 to 50 mole % of the monomer units in the membrane, said membrane having a degree of salt rejection of less than 1% and a permeability to water of more than 100 liters/day.m.sup.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: May 4, 1993
    Assignee: Hospal Ltd.
    Inventor: Xavier Marze