Patents Assigned to Pennwalt Corporation
  • Patent number: 4910335
    Abstract: A method for decolorizing color contaminated alkanesulfonic or arenesulfonic acids represented by Formula I:RSO.sub.3 H Icomprises mixing the color contaminated acid with an effective amount of a dialkanesulfonyl or diarenesulfonyl peroxide represented by Formula II:R.sup.1 SO.sub.2 --O--O--O.sub.2 SR.sup.1 IIand allowing the mixture to stand at a temperature and for a period of time sufficient to allow the color of the acid to decrease to the desired level, wherein R in Formula I and R.sup.1 in Formula II may each represent an alkyl radical or an aryl radical, with the proviso that R in Formula I may be the same as or different from R.sup.1 in Formula II.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: March 20, 1990
    Assignee: Pennwalt Corporation
    Inventor: Gregory A. Wheaton
  • Patent number: 4906280
    Abstract: T-butylhydrazides of carboxylic acid anhydrides and carboxylic acid chlorides useful as plant growth regulants in the free acid form or their equivalent salts.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: March 6, 1990
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Shyam B. Advani
  • Patent number: 4904894
    Abstract: A hail sensor is disclosed which contains a piezoelectric transducer positioned to produce an output signal when it is vibrated by a hailstone. In one embodiment, the transducer is mounted on a perforated member which is exposed to falling precipitation. In an alternative embodiment, the hailstone impacts a rebound surface and is deflected toward the transducer where an electrical output is produced.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventors: John C. Henry, Kyung Tae Park, Edward Tom
  • Patent number: 4904222
    Abstract: An amusement device is disclosed which contains a signal generator attached to a flexible member. When the flexible member is repeatedly waved, an oscillatory electrical signal is produced by the signal generator and supplied to a sound generator which produces sound which synchronously varies with the repeated flexure of the member caused by the waving action. The sound generator produces a first tone with respect to the oscillatory electrical signal and a second tone when the frequency of the oscillatory electrical signal exceeds a predetermined value.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventors: Raymond F. Gastgeb, Edward Tom
  • Patent number: 4904795
    Abstract: Novel halogen-substituted phthalimides are provided which are the reaction product of a halogenated phthalic anhydride with an alkoxylated amine or the reaction product of a halogenated phthalic anhydride with a siloxy amine. The halogen-substituted phthalimides are useful in increasing the flame retardancy of thermoplastic and thermosetting resins, and are also effective as processing aids in improving the flowability and moldability of thermoplastic resins during melt processing.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventors: Joseph M. Bohen, Gerald H. Reifenberg, Daryl L. Stein
  • Patent number: 4904739
    Abstract: Compositions of poly(fluoroacetylene) useful for providing electrically conductive properties to plastics by a method of dehydrofluorination of saturated fluoroethylene polymers.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: February 27, 1990
    Assignee: Pennwalt Corporation
    Inventor: Stanley R. Sandler
  • Patent number: 4902804
    Abstract: The reaction products of the alpha-halogenated half esters or amides of succinic acid and thiadiazole dimercaptides as new compositions of matter and their use as lubricant additives possessing multifunctional properties such as extreme pressure, antiwear, antioxidant and anticorrosion.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: February 20, 1990
    Assignee: Pennwalt Corporation
    Inventors: James P. King, Sameeh S. Toukan
  • Patent number: 4899249
    Abstract: A dielectric medium composition comprising a fluorine-containing amide or a fluorine-containing sulfonamide and capacitors or other electric devices incorporating said composition, are disclosed herein.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: February 6, 1990
    Assignee: Pennwalt Corporation
    Inventors: James L. Reilly, Ludwig K. Huber, Gordon R. Leader
  • Patent number: 4895977
    Abstract: The removal of oxidizable organic impurities which include alkylthiolsulfonate from alkanesulfonic acids by treatment with an ozone containing gas is disclosed. The treated products have improved color and odor and exhibit improved long-term color stability.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: January 23, 1990
    Assignee: Pennwalt Corporation
    Inventor: Martin Nosowitz
  • Patent number: 4891144
    Abstract: Oil soluble lubricant additives produced by the reaction of dimercapto thiadiazoles or cyanodithioimidocarbonate polymers with a polyalkenylenesuccinimide, an aliphatic carboxylic acid and a mercaptan are disclosed.
    Type: Grant
    Filed: August 10, 1988
    Date of Patent: January 2, 1990
    Assignee: Pennwalt Corporation
    Inventor: Sameeh S. Toukan
  • Patent number: 4888090
    Abstract: A stable aqueous etchant for aluminum containing surfaces and method of etching such surfaces.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: December 19, 1989
    Assignee: Pennwalt Corporation
    Inventor: Nicholas J. Sheetz
  • Patent number: 4885347
    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: January 11, 1989
    Date of Patent: December 5, 1989
    Assignee: Pennwalt Corporation
    Inventor: Terry N. Myers
  • Patent number: 4881794
    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: August 25, 1988
    Date of Patent: November 21, 1989
    Assignee: Pennwalt Corporation
    Inventor: Edward J. Bartoszek
  • Patent number: 4876048
    Abstract: An ozone-containing gas is used for removing oxidizable odorous impurities and color from alkanesulfonyl chlorides.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: October 24, 1989
    Assignee: Pennwalt Corporation
    Inventors: David M. Gardner, Gregory A. Wheaton, Martin Nosowitz
  • Patent number: 4874803
    Abstract: The present invention comprises reaction products resulting from the reaction of hydrazido-substituted or certain amino-substituted polymer stabilizers and cyclic dianhydrides, as well as the use of such products. The polymer stabilizers of the invention are useful for protecting a large variety of synthetic polymeric organic materials from the degradative effects of heat, light and oxygen. Some of the modifiers are flame retardants and many are metal deactivators in addition to their primary activity.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: October 17, 1989
    Assignee: Pennwalt Corporation
    Inventors: Arthur L. Baron, Terry N. Myers, Jerome Wicher
  • Patent number: 4870868
    Abstract: A sensing device is disclosed which produces a response when the point of impact between an object and a member occurs at a preselected location on the member. When the member vibrates after being impacted by the object, an oscillatory electrical signal is produced by a piezoelectric sensor. Appropriate circuitry is provided for analyzing the oscillatory electrical signal and for producing a response if the object impacted the member at the preselected location. The sensing apparatus is particularly useful in athletics for determining whether a game object contacted the athletic instrument at its "sweet spot".
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: October 3, 1989
    Assignee: Pennwalt Corporation
    Inventors: Raymond F. Gastgeb, Edward Tom
  • Patent number: 4869844
    Abstract: An ultra-high solids, stable, liquid, highly alkaline caustic cleaner containing 40 to 80 weight percent total solids having 5 to 42 weight percent of an inorganic particulate material dispersed therein, such as an alkaline silicate, that is nonreactive and insoluble in the caustic of the composition.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: September 26, 1989
    Assignee: Pennwalt Corporation
    Inventor: Mark D. Johnson
  • Patent number: 4868246
    Abstract: Ultraviolet light stabilizers are chemically bound to anhydride containing polymers or copolymers. The polymeric stabilizers are prepared by the reaction of primary amino or hydrazido-substituted UV absorbers with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration, or extraction, even at high temperature. The polymer of this invention may be used as they are or as concentrates to stabilize other polymer systems.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: September 19, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald E. MacLeay, Terry N. Myers
  • Patent number: 4866136
    Abstract: N-(polyalkyl-4-piperidinyl)imide containing polymer is prepared by blending together a mixture of a polymer containing anhydride functions and a 4-amino-polyalkylpiperidine or its 1-alkyl or 1-acyl derivatives and heating said materials in the blend, either prior to or during the blending step to the molten stage of the polymer; thereafter, heating said blend above 180.degree. C. for a sufficient time to form the product. All volatile by-products are removed either simultaneously or subsequently with the above 180.degree. C. heating step.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: September 12, 1989
    Assignee: Pennwalt Corporation
    Inventor: Ronald E. MacLeay
  • Patent number: 4863999
    Abstract: Polymer bound stabilizer compounds are provided in which two or more different classes of stabilizers are chemically bound to anhydride containing polymers or copolymers. The polymeric stabilizers are prepared by the reaction of primary amino or hydrazido substituted stabilizers (i.e., antioxidants, light stabilizers, etc.) with some or all of the anhydride groups of the polymer or copolymer to form pendant stabilizer substituted imide or amic acid groups. The polymer bound stabilizers are not lost from the polymer system by volatilization, migration or extraction, even at high temperatures. The polymer bound stabilizer compounds may be used as concentrates to stabilize other polymer systems.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: September 5, 1989
    Assignee: Pennwalt Corporation
    Inventors: Ronald E. MacLeay, Terry N. Myers