Patents Assigned to Pennwalt Corporation
  • Patent number: 4859281
    Abstract: A copper etching composition and an improved method for copper etching utilizing the composition, the composition includes an aqueous solution of a strong acid, a stabilized hydrogen peroxide, and an accelerator that can include both tolyltriazole and either an aliphatic water soluble monoalcohol or a glycol monoether in the etchant solution to provide a faster etching rate.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: August 22, 1989
    Assignee: Pennwalt Corporation
    Inventor: Kurt Goltz
  • Patent number: 4859778
    Abstract: An improved process for the manufacture of 2,2'-dithiobis(benzothiazole). More particularly, the invention relates to an improved process for preparing 2,2'-dithiobis(benzothiazole) using various nonionic and cationic surfactants to reduce or eliminate the formation of large particles in the product.
    Type: Grant
    Filed: March 17, 1988
    Date of Patent: August 22, 1989
    Assignee: Pennwalt Corporation
    Inventors: Edward L. Graeber, Michael J. Lindstrom
  • Patent number: 4857595
    Abstract: Polymer bound hindered amine light stabilizers are prepared by reacting hindered amine light stabilizers containing reactive hydrazide functionalities with anhydride containing polymers or copolymers. The reactions may be carried out in an inert solvent or in a melt blending step. The polymer bound hindered amine light stabilizers are useful alone or may also be used to stabilize other polymers, copolymers or polymer blends against the deleterious effects of heat and/or light.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: August 15, 1989
    Assignee: Pennwalt Corporation
    Inventors: Robert T. Kazmierzak, Ronald E. MacLeay
  • Patent number: 4857596
    Abstract: Polymer bound antioxidants are provided in which the antioxidant stabilizer groups are chemically bound to polymers or copolymers by an acylaminoimide or diacylhydrazide function. The polymer bound antioxidants are prepared by reacting hydrazido substituted antioxidants with some or all of the anhydride groups of anhydride containing polymers or copolymers. The concentration of the stabilizers bound to the polymer may be readily varied depending upon the particular end-use of said polymer. Polymer with high concentrations of bound antioxidants can be used as masterbatches to stabilize other polymer systems.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: August 15, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald E. MacLeay, Terry N. Myers
  • Patent number: 4855113
    Abstract: Sulfur-laden liquid organic phase dimethyl polysulfide (DMPS) is caused to rise from a sour gas well by reaction of the gaseous sulfur component within the well with a sulfur solvent, typically dimethyl disulfide (DMDS). The DMPS is contacted by an extraction or stripping liquid in a vertical column continuous multistage countercurrent flow extractor especially designed to promote high interfacial area contact between the liquids while flowing in opposing directions within the column.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: August 8, 1989
    Assignee: Pennwalt Corporation
    Inventor: Jeffrey H. Yen
  • Patent number: 4855462
    Abstract: N-(Arylalkyl) dibenzoxepin propanamines useful as antihistamines, such as 3-dibenz[b,e]oxepin-11(6H)-ylidene-N-methyl-N-[6-[4-(1,1-dimethylethyl)phe nyl]-6-oxohexyl]-1-propanamine hydrochloride.
    Type: Grant
    Filed: June 17, 1988
    Date of Patent: August 8, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald C. Griffith, James J. Napier
  • Patent number: 4847077
    Abstract: Controlled release pharmaceutical preparations containing coated sulfonic acid cationic exchange resin drug complex particles, the resin particles having been treated, prior to coating, with about 15 to 25% by weight of glycerin, based on the combined weight of the glycerin and the drug resin complex particles.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: July 11, 1989
    Assignee: Pennwalt Corporation
    Inventor: Yegnaswami Raghunathan
  • Patent number: 4846584
    Abstract: A fast reacting, automated calorimeter includes a reaction vessel containing a chemically reacting mass, a fluid circulation system containing heat transfer fluid, a portion of the system passing the fluid through the reaction vessel for exchanging heat between the fluid and the reacting mass, a flow rate controller at least generally responsive to variations in temperature of the reacting mass to vary the flow rate of the fluid circulated through the reaction vessel portion of the circulation system, a flow rate signal generator generating a signal related to the varying flow rate of the fluid passing through the reaction vessel portion of the fluid circulation, and a circuit, preferably including a computer, responsive at least to the flow rate signal and generating a heat flow signal generally related to instantaneous rate of heat exchange between the reacting mass and the fluid.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: July 11, 1989
    Assignee: Pennwalt Corporation
    Inventors: Robert H. Burch, Joseph M. Gravelle
  • Patent number: 4847301
    Abstract: Novel .alpha.-aryl-.alpha.-(.omega.-aminoalkyl)-.alpha.-[hydroxy(aralkyl and cycloalkyl)]acetic acid derivatives and .alpha.-aryl-.alpha.-(.omega.-aminoalkyl)-.alpha.[alkanoyloxy(aralkyl and cycloalkyl)]acetic acid derivatives, such as N,N-dimethyl-2-(hydroxyphenylmethyl)-4-dimethylamino-2-phenylbutanamide, 2-(hydroxyphenylmethyl)-5-dimethylamino-2-phenylpentanenitrile, ethyl 2-(hydroxyphenylmethyl)-5-dimethylamino-2-phenylpentanoate, and N,N-dimethyl-2[(acetyloxy)phenylmethyl]-4-dimethylamino-2-phenylbutanamide , useful in the treatment of cardiovascular disease.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: July 11, 1989
    Assignee: Pennwalt Corporation
    Inventor: Robert J. Murray
  • Patent number: 4845270
    Abstract: The present invention discloses the use of propanone 1,3-disulfonic acid as an esterification catalyst. This catalyst has a significantly higher reaction rate when compared to conventional esterification catalysts, such as methanesulfonic acid and sulfuric acid.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: July 4, 1989
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4843275
    Abstract: Piezoelectric polymer film, when conformably adhered to inner or outer surfaces of an inflated balloon, functions as a microphone when the pressure of sound waves causes the film to vibrate and generate an electrical signal. The film may be in the form of an helical strip, individual strips electrically serially connected, or may itself form the inflatable material. A receiving device is electrically coupled with the electrodes formed on the piezoelectric film for processing the electrical signals generated by the vibrating piezoelectric polymer film.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: June 27, 1989
    Assignee: Pennwalt Corporation
    Inventor: Peter F. Radice
  • Patent number: 4841256
    Abstract: A structural member having a piezoelectric transmitter film and a piezoelectric receiver film adhered thereto. The transmitter film produces a vibration upon activation by a voltage controlled oscillator which forms part of a phase-lock loop circuit. The vibrations of the structural member generate electric signals on the receiver film, which feed into a phase comparator. The other input of the phase comparator is the output signal of the voltage controlled oscillator. The phase comparator will output a dc signal proportional to the difference in phase between the two signals. When the structural member becomes damped, the phase comparator will go into saturation, thereby producing a voltage which can activate an alarm signal or other device.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: June 20, 1989
    Assignee: Pennwalt Corporation
    Inventor: Raymond F. Gastgeb
  • Patent number: 4835283
    Abstract: This invention pertains generally to substituted 2-methylisoxazolines and more specifically to 3,5-diphenyl-3-[(1H-imidazol-1-ylmethyl) or (1H-1,2,4-triazol-1-yl-methyl)]-2-methyl-4-isoxazoline derivatives which are useful as antifungal agents.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 30, 1989
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Patent number: 4831096
    Abstract: Mixtures of azolakanes of varying thermal stabilities at least one of which is an unsymmetrical azoalkane (R--N.dbd.N--R'), are prepared by reacting 4 equivalents of a mixture of two or more primary alkyl, cycloalkyl or aralkylamines with 1 equivalent of sulfuryl chloride in an inert solvent and oxidizing the resulting mixture of sulfamide products with basic bleach. The unsymmetrical azoalkanes can be separated from the symmetrical azoalkanes by a variety of conventional techniques. The azoalkane mixtures are excellent polymerization initiators for vinyl monomers and curing agents for unsaturated polyester resins.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: May 16, 1989
    Assignee: Pennwalt Corporation
    Inventor: Ronald E. MacLeay
  • Patent number: 4831154
    Abstract: 5-alkyl(or alkenyl)-3-phenyl-3-(1H-imidazol-1-ylmethyl) -2- methylisoxazolidines and related derivatives in which hydrogens of their phenyl rings can be replaced by halogen, lower alkyl or lower alkoxy groups are useful as antifugal agents.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: May 16, 1989
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Patent number: 4827031
    Abstract: The process for preparing aliphatic and aromatic amines by reacting an olefin with either ammonia, a primary amine, or a secondary amine at elevated temperature in the presence of an ammonium halide catalyst, preferably a catalyst-promoter combination, is disclosed herein.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: May 2, 1989
    Assignee: Pennwalt Corporation
    Inventors: David M. Gardner, Paul J. McElligott, Roger T. Clark
  • Patent number: 4827055
    Abstract: Vinylidene fluoride is produced by the gaseous phase reaction of vinylidene chloride with hydrofluoric acid at a temperature of from about 400.degree. to 700.degree. C. in the presence of oxygen and a catalyst containing AlF.sub.3 either alone or in combination with a transition metal fluoride selected from iron, cobalt, chromium, nickel, zinc and combinations thereof.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 2, 1989
    Assignee: Pennwalt Corporation
    Inventor: Maher Y. Elsheikh
  • Patent number: 4824586
    Abstract: An improved acidic metal working lubricant composition that is adapted to deposit oil upon the metal surfaces being treated at an acidic pH, which composition includes an alkaline activated surface active agent to promote cleansing of the deposited oil from the metal surfaces during alkaline cleaning of the metal surfaces after metal working without affecting lubricant performance during metal working.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: April 25, 1989
    Assignee: Pennwalt Corporation
    Inventors: Mark D. Johnson, Nelson W. Smith
  • Patent number: 4824884
    Abstract: Amic acids, cyclic imides and mixtures thereof which contain both diacyl hydrazide functionalities and hindered amine functionalities are prepared by reacting non-halogenated cyclic anhydrides with hindered amine light stabilizers containing reactive hydrazido funtionalities in inert solvents or in inert polymeric compositions in a melt blending step. The compositions protect polymeric compositions against the degradative effects of heat and light.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: April 25, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald E. MacLeay, Robert T. Kazmierczak
  • Patent number: RE32990
    Abstract: Warm-blooded animals are treated for Herpes simplex virus-I by administering to the animal a dosage, effective to alleviate the symptoms of the virus, of undecylenic acid and at least one pharmaceutically acceptable carrier, wherein the compound is in the range of from about 1 to about 95% by weight of the composition.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: July 18, 1989
    Assignee: Pennwalt Corporation
    Inventor: C. Richard Kinsolving