Patents Assigned to Pennwalt Corporation
  • Patent number: 4822474
    Abstract: A residual analyzer assembly including an analyzer probe, typically of the amperometric type having a stable zero calibration, and a working fluid sampler system having means for backflushing the flow so as to periodically cleanse the system. The residual analyzer probe having two bare electrodes operating as a working electrode and a counter electrode. The working electrode being formed in a double spiral helix with the counter electrode being formed in an outer peripheral ring closely adjacent the working electrode. The probe also including a third electrode within an electrolytic solution and positioned behind a membrane located directly behind the working electrode. The three electrode system operated utilizing a potentiostat type circuit. The working fluid sampler system adapted to sample a portion of the working fluid flow and maintain a constant pressure into a flow block. A controlled amount of reagent being added for proper residual analyzation of the sample.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: April 18, 1989
    Assignee: Pennwalt Corporation
    Inventor: Daniel R. Corrado
  • Patent number: 4822883
    Abstract: Compounds which contain peroxide linkages and the radical of a hindered amine light stabilizer group are provided. These compounds function as polymerization initiators which cause the hindered amine stabilizer to be chemically bound to the polymer.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: April 18, 1989
    Assignee: Pennwalt Corporation
    Inventor: Terry N. Myers
  • Patent number: 4812596
    Abstract: A process is provided for converting waste distillation bottoms containing t-alkylphenols with substantial unknown constituents to useable para-t-alkylphenols. The process comprises heating the waste distillation bottoms with phenol and an acid catalyst to effect transalkylation. The waste distillation bottoms typically result from the production of para-t-alkylphenol and/or 2,4-di-t-alkylphenol.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: March 14, 1989
    Assignee: Pennwalt Corporation
    Inventors: Altaf Husain, Stanley R. Sandler
  • Patent number: 4806660
    Abstract: Compounds such as 6-[3-(cyclopropylamino)-2-hydroxypropoxy]aurone hydrochloride showing inhibitory activity against LTC.sub.4 -induced contraction of guinea pig ileum are useful as inhibitors of allergic reactions.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: February 21, 1989
    Assignee: Pennwalt Corporation
    Inventor: Edwin S. Wu
  • Patent number: 4806082
    Abstract: An improved flow-limiting fluid refill valve for use with a fluid-actuated pump having a fluid chamber comprises a valve housing, fluid inlet means in communication with a source of hydraulic fluid and fluid outlet means in fluid communication with the fluid chamber of the pump. A first valve within the valve housing is provided between the fluid inlet means and the fluid outlet means for permitting a flow of fluid from the fluid source to the fluid chamber when the suction pressure within the fluid chamber exceeds the first predetermined pressure limit indicating that the fluid within the fluid chamber has been depleted below a predetermined fluid limit. The improvement comprises a second valve within the valve housing for preventing the flow of fluid from the fluid source to the fluid chamber when the suction pressure within the fluid chamber exceeds a second predetermined pressure limit greater than the first predetermined pressure limit and indicating abnormal operation of the pump.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: February 21, 1989
    Assignee: Pennwalt Corporation
    Inventor: Jacob W. Schenk
  • Patent number: 4804775
    Abstract: An improved process is provided for preparing stable low viscosity polymer-polyols containing less than about 100 ppm residual monomers by using a monoperoxycarbonate initiator in combination with at least one initiator selected from diperoxyketals and peroxyesters, as chaser catalysts, at or near the end of the polymerization. The polymer-polyols prepared by the instant invention can be used to prepare high resiliency (load bearing) polyurethane foams.
    Type: Grant
    Filed: September 9, 1986
    Date of Patent: February 14, 1989
    Assignee: Pennwalt Corporation
    Inventors: Vasanth R. Kamath, Leonard H. Palys
  • Patent number: 4804702
    Abstract: Fluorinated polymer based compositions which include aluminum silicates and electrical and fiber optic cable constructions made from such compositions have improved low smoke and flame retardant properties.
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: February 14, 1989
    Assignee: Pennwalt Corporation
    Inventor: Edward J. Bartoszek
  • Patent number: 4804485
    Abstract: A composition, useful for dissolving sulfur, which comprises a major amount of a disulfide or polysulfide and a catalyst comprising one or more polyalkyleneoxyamines or polyamines, and methods for using the composition in a system to prevent sulfur-plugging, are disclosed.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: February 14, 1989
    Assignee: Pennwalt Corporation
    Inventors: Glenn T. Carroll, Michael J. Lindstrom, William J. Tuszynski
  • Patent number: 4803282
    Abstract: .alpha.-Substituted ketonitrone derivatives containing substitutents selected from hydrogen, phenyl, substituted phenyl, naphythyl, furan, thiopen, imidazolylmethyl and triazolylmethyl are useful as intermediates for the preparation of biologically active isoxazolidine compounds.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: February 7, 1989
    Assignee: Pennwalt Corporation
    Inventors: Vassil St. Georgiev, George B. Mullen
  • Patent number: 4801749
    Abstract: Phenolic antioxidant hydrazides are provided which are useful to stabilize organic materials (such as synthetic polymers) which are subject to oxidative degradation.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: January 31, 1989
    Assignee: Pennwalt Corporation
    Inventors: Robert T. Kazmierczak, Ronald E. MacLeay, Jerome Wicher
  • Patent number: 4800028
    Abstract: Novel dimercapto thiadiazoles and cyanodithioimidocarbonate polymers and oil soluble lubricating additives thereof.
    Type: Grant
    Filed: July 6, 1987
    Date of Patent: January 24, 1989
    Assignee: Pennwalt Corporation
    Inventor: Sameeh S. Toukan
  • Patent number: 4800048
    Abstract: Apparatus and processes for preparing polymeric piezoelectric films of one or more layers or tubular products having a central wire core by drawing a suitable polymeric blank through either a flat or a conically tapered drawing die having associated electrical field producing means, to simultanelusly stretch and pole the polymeric material within the die chamber.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: January 24, 1989
    Assignee: Pennwalt Corporation
    Inventors: Philip E. Bloomfield, Richard A. Ferren, Dean H. Wickwire
  • Patent number: 4798687
    Abstract: Compounds are provided of the following general structure: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected from hydrogen or methyl and A is amino, C.sub.1 -C.sub.4 monoalkylamino, C.sub.2 -C.sub.8 dialkylamino, cyclopropylamino, 1-pyrrolidinyl, 1-piperidinyl or 4-morpholinyl. They are useful for providing sedative and antiepileptic activity.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: January 17, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald C. Griffith, James J. Napier
  • Patent number: 4797498
    Abstract: Ester derivatives of N-substituted and N,N-disubstituted aminopropanoloxy flavones in which the aminopropanoloxy side chain is inserted at either the 5-, 6-, 7- or 8-position of the flavone nucleus, and N-substituted and N,N-disubstituted aminopropanoloxy flavones in which the aminopropanoloxy side chain is inserted at the 8-position of the flavone nucleus; useful as anti-dysrhythmic agents.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: January 10, 1989
    Assignee: Pennwalt Corporation
    Inventors: William L. Albrecht, Edwin S. Wu
  • Patent number: 4785117
    Abstract: 5,5-Disubstituted-3-phenyl-3-[(1H-imidazol-1-ylmethyl) or (1H-1,2,4-triazol-1-ylmethyl)]-2-methylisoxazolidine derivatives are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: November 15, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Patent number: 4783537
    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: November 13, 1985
    Date of Patent: November 8, 1988
    Assignee: Pennwalt Corporation
    Inventor: Robert J. Murray
  • Patent number: 4782058
    Abstract: Novel 1,3,4,6,7,11b-hexahydro-6-phenyl-2H-pyrazino[2,1-a]isoquinolines, including a cis-1,3,4,6,7,11b-hexahydro-9-methoxy-2-methyl-6-phenyl-2H-pyrazino[2,1-a] isoquinoline dihydrochloride and cis-1,3,4,6,7,11b-hexahydro-9-hydroxy-2-methyl-6-phenyl-2H-pyrazino[2,1-a] isoquinoline dihydrobromide; useful as anti-histamine and anti-depressant agents.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: November 1, 1988
    Assignee: Pennwalt Corporation
    Inventor: Ronald C. Griffith
  • Patent number: 4777264
    Abstract: 5-Carbonyl derivatives of 3-phenyl-3-(1-H-imidazol-1-ylmethyl)-2-methylisoxazolidines and related compounds are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: October 11, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Patent number: 4777263
    Abstract: 5-Substituted-3-(2-naphthalenyl)-3-[(1H-imidazol-1-ylmethyl or (1H-1,2,4-triazol-1-ylmethyl)]-2-methylisoxazolidines are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: October 11, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen
  • Patent number: 4777262
    Abstract: 5-(Substituted thiomethyl)-3-phenyl-3-(1H-imidazol-1-ylmethyl)-2-methylisoxazolidine derivatives are useful as antifungal agents.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: October 11, 1988
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen