Patents Assigned to Pennwalt Corporation
  • Centrifuge apparatus
    Patent number: 4761157
    Abstract: A decanter centrifuge is equipped with a conventional screw conveyor which advances separated solids or heavy phase material toward a solids discharge zone, and it is also equipped with discharge nozzles mounted on the bowl wall for discharging concentrated solids therethrough from the solids discharge zone. In addition to light phase or liquid discharge means, the centrifuge is further provided with a recycle system which returns at least a portion of the discharged solids to the solids discharge zone via a conduit. At the end of the conduit are recycle tubes mounted on the hub of the screw conveyor. The effect of feeding recycled solids to the discharge zone, to which newly separated solids is also being advanced, is to increase the solids concentration of the solids being discharged by the discharge nozzles.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: August 2, 1988
    Assignee: Pennwalt Corporation
    Inventor: Leonard Shapiro
  • Cyclohexene carboxylic esters and amides as antidysrhythmic agents
    Patent number: 4760146
    Abstract: Novel compounds and processes for making and using them. The compounds include ethyl 1-[3-(1-piperidinyl)propyl]-6-phenyl-3-cyclohexene-1-carboxylate, 1-[3-(1-piperidinyl)propyl]-6-phenyl-3-cyclohexene-1-carboxyamide, and N,N-dimethyl-1-[3-(1-piperidinyl)propyl]-6-phenyl-3-cyclohexene-1-carboxam ide.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: July 26, 1988
    Assignee: Pennwalt Corporation
    Inventor: Bruce H. Toder
  • Electromechanical linear actuator
    Patent number: 4759386
    Abstract: Electrochemical linear actuator for automatically controlling a gas feeder linear motion valve, for example, is provided with a readily accessible and simple to operate manual override capability, while yet affording accurate position indication of the linear motion valve being controlled in both automatic and manual modes of operation.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: July 26, 1988
    Assignee: Pennwalt Corporation
    Inventor: Albert V. Grouw, III
  • Preparation of 7-(3-(propylamino)-2-hydroxypropoxy)flavone
    Patent number: 4758679
    Abstract: In a process for preparing 7-[3-(propylamino)-2-hydroxypropoxy]flavone by the reaction of 7-(2,3-epoxypropoxy)flavone and n-propylamine, the improvement which resides in treating the beta-aminochalcone by-product with a weak organic acid to convert the chalcone to the desired aminated flavone.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: July 19, 1988
    Assignee: Pennwalt Corporation
    Inventors: Hans F. Schmitthenner, Edwin S. C. Wu
  • Preparation of 7-(2,3-epoxypropoxy)flavone
    Patent number: 4758678
    Abstract: 7-(2,3-Epoxypropoxy)flavone is prepared by the reaction of 7-hydroxyflavone with an epihalohydrin in the presence of a weak base and acetonitrile.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: July 19, 1988
    Assignee: Pennwalt Corporation
    Inventor: Hans F. Schmitthenner
  • Shelf channel display tray
    Patent number: 4756409
    Abstract: An open top clear display tray having a display or billboard panel extending downwardly from the tray's front panel. The display panel is positioned against the channel portion of shelves in drug stores, supermarkets, and the like, and includes a clear upper portion which permits information affixed to the channel to remain visible while the lower portion contains the promotional point-of-purchase display for increasing potential sales of those products contained within the display tray.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: July 12, 1988
    Assignee: Pennwalt Corporation
    Inventor: James R. Murray
  • Methods and apparatus for protecting metal structures
    Patent number: 4755267
    Abstract: Corrosion prevention methods and apparatus are disclosed for protecting a metal structure immersed in a corroding electrolyte wherein a continuously applied filtered direct current is passed therethrough. A reference electrode or cell, preferably one, is immersed with the electrolyte between anode means and the structure wall but spaced a considerable distance from the wall. The metal structure potential is sensed and measured against the reference electrode, free of IR drop effect of the protective current and electrolyte resistivity variations, by automatic and periodic modulation of the protective current. Calculations are suitably made by a microprocessor-based controller which also regulates the protective current for maintaining a selected structural potential.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: July 5, 1988
    Assignee: Pennwalt Corporation
    Inventor: David N. Saunders
  • Method of continuously degassifying water
    Patent number: 4755195
    Abstract: A method of continuously degassifying water includes the steps of continuously introducing helium gas into a vessel forming a substantially vertically disposed chamber therewithin at an upper portion thereof; continuously directing upwardly a spray of fine water droplets formed from undegassed water continuously introduced into said chamber at a lower portion thereof; permitting said fine water droplets to intimately contact said helium gas to displace gases contained in said water droplets to provide degassed water in accordance with Dalton's Law of Partial Pressures, said degassed water proceeding towards a bottommost portion of said chamber and vessel; and continuously directing said degassed water through an outlet at said bottommost portion of said vessel into a device desirous of using said continuous flow degassed water.
    Type: Grant
    Filed: April 16, 1987
    Date of Patent: July 5, 1988
    Assignee: Pennwalt Corporation
    Inventors: Bruce J. Compton, Robert W. Giering
  • 5-{[naphthyl(or 2-oxo-1,3-benzoxathiol-6-yl)oxy]methyl}-3-phenyl-3-(1H-imidazol-1-ylmeth yl)-2-methylisoxazolidines
    Patent number: 4754042
    Abstract: 5-{[Naphthyl(or 2-oxo-1,3-benzoxathiol-6-yl)oxy]methyl}-3-phenyl-3-(1H-imidazol-1-ylmethyl )-2-methylisoxazolidines are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: June 28, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • 5-substituted-3-phenyl-3-[1H-imidazol-1-ylmethyl) or (1H-1,2,4-triazol-1-ylmethyl]-2-benzylisoxazolidines (ir 3011)
    Patent number: 4749793
    Abstract: 5-Substituted-3-phenyl-3-[1H-imidazol-1-ylmethyl) or (1H-1,2,4-triazol-1-ylmethyl)]-2-benzylisoxazolidines are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: June 7, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Substituted alpha-[2'-tricyclo[3.3.1.1.sup.3,7 ]-decylidene]benzeneacetonitrile derivatives
    Patent number: 4748264
    Abstract: Substituted .alpha.-[2'-tricyclo[3.3.1.1.sup.3,7 ]decylidene]benzeneacetonitrile derivatives having antihypoxia and anti-inflammatory activities of the formula: ##STR1## where the R.sup.1, R.sup.2 and R.sup.3 substituents are independently selected from hydrogen, lower alkyl, lower alkoxy, halogen and trifluoromethane, provided that at least one of such substituents is hydrogen.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: May 31, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Substituted alpha-(2-tricyclo(3.3.1.13,7)-decylidene)benzeneacetamide derivatives
    Patent number: 4745220
    Abstract: Substituted .alpha.-[2'-tricyclo[3.3.1.1.sup.3,7 ]decylidene]-benzenacetamide derivatives of the formula: ##STR1## where the R.sup.1, R.sup.2 and R.sup.3 substitutents are independently selected from hydrogen, lower alkyl, lower alkoxy, halogen and trifluoromethyl, provided that at least one of such substitutents is hydrogen, have antihypoxia, antiparkinson, and/or anticonvulsant activities.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: May 17, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Lubricant additive mixtures of antimony thioantimonate and antimony trioxide
    Patent number: 4741845
    Abstract: A lubricant additive that includes antimony thioantimonate and antimony trioxide in a specified ratio for enhancing the extreme pressure, antiwear, and antiabrasive properties of conventional lubricants as well as for use in lubrication of a wide variety of lubricated contact surfaces.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: May 3, 1988
    Assignee: Pennwalt Corporation
    Inventor: James P. King
  • Method of suppressing the immune system comprising administering 5H-thiazolo[2,3-b]quinazoline-3(2H)-one
    Patent number: 4738964
    Abstract: The novel compound, 5H-thiazolo[2,3-b]quinazolin-3(2H)-one, and derivatives thereof in which a nuclear hydrogen of its benzene ring is replaced by lower alkyl, alkoxy, halogen, trifluoromethyl, NO.sub.2 or NH.sub.2 ; useful as anti-hypertensive agents and immunosuppressive agents.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: April 19, 1988
    Assignee: Pennwalt Corporation
    Inventors: Grace A. Saeva, Vassil S. Georgiev
  • Adamantane spiro-pyrrolidine derivatives
    Patent number: 4739074
    Abstract: Adamantane spiro-pyrrolidine derivatives, more specifically, spiro[pyrrolidine-5,2'-tricyclo[3.3.1.1.sup.3,7 ]decane]derivatives of the structure ##STR1## where X is oxygen or two hydrogen radicals and R is hydrogen or ##STR2## where R.sup.1 is a C.sub.1 -C.sub.18 alkyl radical, phenyl or phenylcyclopropyl, are disclosed herein. Said derivatives have been found to have activity in laboratory animal models against carrageenan-induced edema.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: April 19, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Antimony thioantimonate lubricant additive and preparation
    Patent number: 4735790
    Abstract: Method of preparing SbSbS.sub.4 product having a low level of free sulfur impurity, which includes mixing aqueous solutions of an alkali metal thioantimonate and a halide stabilized antimony trihalide to form a reaction mixture, while maintaining the reaction mixture at a pH of less than 7, to provide the SbSbS.sub.4 product having a low level of free sulfur impurity.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: April 5, 1988
    Assignee: Pennwalt Corporation
    Inventors: William V. Hanks, Charles B. Lindahl, Dayaldas T. J. Meshri, James P. King
  • 3-(3-halophenyl-3,4-diazatetracyclo-[6.3.1.1.sup.6,10.0.sup.1,5 ]tridec-4-en-2-one compounds and use thereof to treat hypoxia
    Patent number: 4732909
    Abstract: 3-(3-Halophenyl)-3,4-diazatetracyclo-[6.3.1.1.sup.6,10.0.sup.1,5 ]tridec-4-en-2-ones are useful as anti-hypoxia agents.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: March 22, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen, Patricia A. Swift
  • Roller for orientation of fruit
    Patent number: 4730719
    Abstract: Rollers for use with singulators for orienting articles, typically fruit, prior to optical sensing, for example, of the fruit's surfaces, wherein fruit having diverse diameters, irregular shapes and bumpy surfaces are properly oriented by contacting a pair of symmetrically disposed truncated conical surfaces sloping uniformly inwardly to a point short of center to form a sheave portion, as well as a deep pocket within each roller and between adjacent rollers, and wherein spacing between rollers remains constant notwithstanding the diverse diameters of the fruit. A drive belt is engageable within the sheave portion of the roller for controlling speed and direction of rotation of the rollers.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: March 15, 1988
    Assignee: Pennwalt Corporation
    Inventors: Ian A. Brown, Everett P. Ristow, Richard D. Walters
  • Apparatus for spinning fruit for sorting thereof
    Patent number: 4726898
    Abstract: Several conveyor rollers of singulators are made to rotate by a fruit orientation belt causing fruit carried thereon to rotate in accordance with movement of the belt such that the rotational axes of the fruit, typically lemons, orient themselves along their stem axes, or substantially perpendicularly to the direction of travel of the singulators. Downstream, the rollers contact a rotating spin-accelerating belt to substantially increase speed of rotation of the rollers and oriented fruit thereon in order to permit optical scanning devices to scan a much larger percentage of the fruit surface areas. Fruit rotate in the same direction of rotation during orientation and spin-acceleration, the latter occurring for only a very short duration.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: February 23, 1988
    Assignee: Pennwalt Corporation
    Inventors: George A. Mills, Ian A. Brown
  • 3-(Substituted phenyl)-3-(1H-1,2,4-triazol-1-yl)methyl-2-methyl-5-[(substituted phenoxy)methyl]isoxazolidine derivatives
    Patent number: 4727157
    Abstract: 3-(substituted phenyl)-3-(1H-1,2,4-triazol-1-yl)methyl-2-methyl-5-[(substituted phenoxy)methyl]isoxazolidine derivatives in which hydrogens of their phenyl rings may be replaced by halogen, lower alkyl, lower alkoxy, alkoxycarbonyl, alkanoylamino or nitro groups are useful as antifungal agents.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: February 23, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil St. Georgiev, George B. Mullen