Patents Assigned to Pennwalt Corporation
  • Selective electrolytic stripping of metal coatings from base metal substrates
    Patent number: 4678552
    Abstract: Metal coatings are stripped from base-metal substrates in an electrolytic process employing an aqueous solution of alkanesulfonic acid of 1 to 4 carbons as the electrolyte at a concentration of from about 45 to about 70 weight percent, the coated base-metal substrate as the anode, and an electroconductive cathode, by impressing an electromotive force across the solution between the electrodes until the current decreases to zero which occurs when the metal coating on the anodic material is depleted and the base-metal substrate is left exposed.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: July 7, 1987
    Assignee: Pennwalt Corporation
    Inventor: Johnson C. Chen
  • 6-phenyl-1,2-3,4,4a,5-6,10b-octahydrobenz(h)isoquinolines useful for treating depression
    Patent number: 4678791
    Abstract: 6-Phenyl-1,2,3,4,4a,5,6,10b-octahydrobenz(h)isoquinolines having anti-depressant activity and methods for their preparation.
    Type: Grant
    Filed: May 7, 1985
    Date of Patent: July 7, 1987
    Assignee: Pennwalt Corporation
    Inventors: James J. Napier, Ronald C. Griffith
  • Production of piezoelectric dielectric films by poling in stack form
    Patent number: 4675959
    Abstract: A multi-layer stack of dielectric films containing at least one piezoelectric-sensitive (PES) film is subjected to a high dc field strength while the stack is maintained at an elevated temperature to induce piezoelectric properties in the PES films. Various stacking arrangements of the films in the multi-layer can be used to obtain enhanced piezoelectric properties for various PES films in the multi-layer stack.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: June 30, 1987
    Assignee: Pennwalt Corporation
    Inventor: Oliver S. Sprout
  • Antimony thioantimonate and intermediate preparation for lubricant additive
    Patent number: 4675168
    Abstract: Method of preparing alkali metal or ammonium thioantimonate and use of the thioantimonate in the preparation of SbSbS.sub.4, having a low level of free sulfur, and lubricants incorporating the SbSbS.sub.4 as an additive.
    Type: Grant
    Filed: April 22, 1985
    Date of Patent: June 23, 1987
    Assignee: Pennwalt Corporation
    Inventors: James P. King, Charles B. Lindahl
  • Microencapsulated pyrethroids
    Patent number: 4670246
    Abstract: A sprayable insecticidal composition of low fish toxicity of a mixture in water of microcapsules comprised of a pyrethroid (synthetic pyrethrin) contained within an encapsulating wall of a cross-linked polymeric material, and methods of preparation and method of use of the composition on a wide variety of crops and aquatic sites infested with a broad spectrum of undesirable insects.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: June 2, 1987
    Assignee: Pennwalt Corporation
    Inventors: Gerd H. Dahl, Joseph Simkin
  • Chromones
    Patent number: 4668805
    Abstract: Chromone derivatives such as 7-(3-n-propylamino-2-hydroxypropoxy)-2,3-diphenylchromones which are useful as pharmaceuticals having antihypertensive properties.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: May 26, 1987
    Assignee: Pennwalt Corporation
    Inventor: Edwin S. Wu
  • Chromones
    Patent number: 4668804
    Abstract: Chromone derivatives such as 7-(3-n-propylamino-2-hydroxypropoxy)-2-phenyl-chromones which are useful as pharmaceuticals having antihypertensive properties.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: May 26, 1987
    Assignee: Pennwalt Corporation
    Inventor: Edwin S. Wu
  • Anti-inflammatory phthalazinones
    Patent number: 4665181
    Abstract: A compound useful as anti-inflammatory agents in warm-blooded animals of the formula ##STR1## wherein X is a member of the class of ethylene and ethenyl and is substituted for hydrogen in the sixth or seventh position of the 1(2H)-phthalazinone ringY is a member of the class of hydrogen and hydroxylR.sub.1 is a member of the class of hydrogen, alkyl, alkoxy, hydroxyl, halogen, nitro, --NR.sub.3 R.sub.4, --COR.sub.5 and --O--A wherein A is a mineral acid residue which with --O-- forms an ester or the alkali metal salt of said ester,R.sub.2 is a member of the class of hydrogen, alkyl, phenyl, substituted phenyl, heteroaryl, hydroxyalkylene, polyhydroxyalkylene, aminoalkylene, alkylaminoalkylene, and carboxyalkylene,R.sub.3, R.sub.4 are independently from the class of hydrogen, alkyl, aminoalkylene or alkylaminoalkylene,R.sub.5 is a member of the class of OR.sub.
    Type: Grant
    Filed: May 17, 1984
    Date of Patent: May 12, 1987
    Assignee: Pennwalt Corporation
    Inventors: Telfer L. Thomas, Lesley A. Radov
  • Polyhydroxy polymer delivery systems
    Patent number: 4657582
    Abstract: A biologically active agent-containing composition is prepared by reacting an aqueous emulsion or dispersion of a suitable biologically active agent and an optional filler in an aqueous solution or gel of a polyhydroxy polymer and an inorganic salt, with a boric acid or boric acid derivative until an insolubilized matrix phase is formed having entrapped therein uniformly dispersed, discontinuous domains of said agent and an optional aqueous phase that can be separated from the matrix phase by decanting, filtration, or the like; the product is then dried and ground to the desired particle size. The composition is applied to the soil or plants where the biologically active agent is slow released for controlling pests.
    Type: Grant
    Filed: May 30, 1985
    Date of Patent: April 14, 1987
    Assignee: Pennwalt Corporation
    Inventor: Ludwig K. Huber
  • Electrolytic cell and anode for brine electrolytes
    Patent number: 4657652
    Abstract: An electrolytic cell for the production of halogen and halates from a corresponding brine electrolyte which includes a novel anode with each anode having an associated pair of cathodes, said anode comprises an aluminum core having a sheath of a titanium group metal and an electrolytic conductive precious metal coating as the outermost layer, to provide a cell without submerged gaskets and elimination of the normal steel corrosion at liquid-gas interfaces.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: April 14, 1987
    Assignee: Pennwalt Corporation
    Inventor: Jimmie R. Hodges
  • Detoxification of waste water from dithiocarbamate manufacture
    Patent number: 4655935
    Abstract: Waste water from the preparation of salts of dithiocarbamic acid is detoxified by acidifying the waste water to promote hydrolytic decomposition of organosulfur compounds, passing an inert gas through the acidified water to aid in expelling decomposition gases thereby increasing the decomposition rate, and, optionally, adjusting the pH of the resulting solution toward neutral.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: April 7, 1987
    Assignee: Pennwalt Corporation
    Inventors: Jan A. Wijn, Peter Kool
  • Rinsing on a solid bowl centrifuge
    Patent number: 4654022
    Abstract: Screw conveyor of solid bowl centrifuge has its flight member modified at the bowl dry beach area by welding sheet metal, for example, to trailing surfaces of the flight forming a chamber for rinse liquid driven thereinto. Leading or working surfaces of the flight are provided with a plurality of series of orifices per 360.degree. revolution thereof, each series comprising spaced orifices extending inwardly from a distal portion thereof and preferentially angled therethrough. Overflow passageways with cooperating baffles are provided. Thus, rinse liquid passes onto solids pile surfaces through orifices immediately inwardly thereof as well as through orifices submerged by the solids for passage of rinse liquid thereinto.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: March 31, 1987
    Assignee: Pennwalt Corporation
    Inventor: Leonard Shapiro
  • 2-adamantanone oxide carbamate derivatives
    Patent number: 4652680
    Abstract: Novel 2-adamantanone oxime carbamate derivatives, including tricyclo[3.3.1.1.sup.3,7 ]decan-2-one O-[(cyclohexyl) aminocarbonyl]oxime, tricyclo[3.3.1.1.sup.3,7 ]decan-2-one O-[3-methoxy)aminocarbonyl] oxime, and tricyclo[3.3.1.1.sup.3,7)decan-2-one O-[(2-chlorophenyl)aminocarbonyl]oxime; useful as antifungal agents against E. floccosum.
    Type: Grant
    Filed: January 28, 1985
    Date of Patent: March 24, 1987
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, Grace A. Saeva
  • Electrolytic recovery of lead from scrap
    Patent number: 4650553
    Abstract: Lead is recovered from lead-containing scrap metal in an electrolytic process employing an aqueous solution of C.sub.1-4 alkanesulfonic acid as the electrolyte at a high concentration, scrap lead as the anode, and an electroconductive cathode, impressing an electromotive force across the solution between the electrodes to provide a specified steady-state concentration of lead salt in the electrolyte, and continuing the process to deplete the anode and collect lead at the cathode.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: March 17, 1987
    Assignee: Pennwalt Corporation
    Inventors: Alfred F. Felgendreger, Ashley D. Nevers, William J. Tuszynski
  • 2-(substituted amino)-2-[2-hydroxy-2-alkyl (or phenyl)ethyl]tricyclo[3.3.1.1.sup.3,7 ]decane hydrohalides
    Patent number: 4649222
    Abstract: 2-(Substituted amino)-2-[2-hydroxy-2-alkyl (or phenyl)ethyl]tricyclo[3.3.1.1.sup.3,7 ]decane hydrohalides are described such as 2-(2-hydroxyoctyl)-2-(methylamino)-tricyclo[3.3.1.1.sup.3,7 ]decane hydrochloride. The compounds possess anti-inflammatory, analgesic, anticonvulsant and/or anti-hypoxia activity.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: March 10, 1987
    Assignee: Pennwalt Corporation
    Inventors: Vassil S. Georgiev, George B. Mullen, Patricia A. Swift
  • Method for maintaining zero calibration values in article sorting machine
    Patent number: 4649494
    Abstract: A method for maintaining zero calibration values representative of average tare, or average empty cup weight, in an article sorting machine of the type employing cups to sort articles by weight comprises the steps of measuring the weight of each cup, and if the cup is carrying an article, the weight of the cup and the article, passing over an electronic scale, and determining whether the cup is carrying an article based upon the value of a weight signal provided by the electronic scale. A running sum of the values of the weight signals for the cups determined not to be carrying articles is maintained. A count of the number of cups determined not to be carrying articles is also maintained. After a selected interval, the running sum is divided by the count to arrive at an updated average tare, or updated average empty cup weight.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: March 10, 1987
    Assignee: Pennwalt Corporation
    Inventor: Robin R. Rosas
  • Sulfone-containing hindered amines
    Patent number: 4649167
    Abstract: Compounds having the formula ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are independently selected from hydrocarbons, n is an integer of 1 to 15, and Y is H, OH, O, R where R is a hydrocarbon are useful as stabilizers for polymers against the detrimental effects produced by exposure to actinic radiation, such as visible or ultraviolet light rays.
    Type: Grant
    Filed: November 14, 1985
    Date of Patent: March 10, 1987
    Assignee: Pennwalt Corporation
    Inventors: Ludwig K. Huber, James L. Reilly
  • Curable organopolysiloxane compositions
    Patent number: 4647641
    Abstract: Organopolysiloxane polymers are cured with bromobenzoyl peroxides of the structure: ##STR1## where n is 1 or 2 and m is 0, 1, or 2 in order to produce non-toxic, stable, cured polymers.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: March 3, 1987
    Assignee: Pennwalt Corporation
    Inventor: Solomon C. Westbrook
  • Bis-(dibenzo[b,d]pyranyloxy) propanes
    Patent number: 4647674
    Abstract: Dibenzopyrone derivatives which possess depressant and/or antihypoxia activity are 1,3-bis(dibenzo[b,d]pyranyloxy propanes having the formula (1): ##STR1## where R and R.sup.1 independently represent hydrogen or methyl; where A is ##STR2## and where X represents single substitution with oxygen or substitution with hydrogen and a second group taken to be hydrogen, hydroxyl, amino, C.sub.1 -C.sub.4 alkylamino or an acyloxy radical ##STR3## where B represents C.sub.1 -C.sub.15 alkyl, --CH.sub.2 CH.sub.2 COOH, or (dimethylamino)phenyl. Also included are pharmaceutically acceptable salt forms of the compounds.These compounds are useful as sedatives and/or for the protection of warm blooded animals from the effects of oxygen deprivation.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: March 3, 1987
    Assignee: Pennwalt Corporation
    Inventor: Ronald C. Griffith
  • Catalyst pellets with resin binder for decomposition of hypochlorite
    Patent number: RE32392
    Abstract: A porous catalyst matrix used for the decomposition of aqueous hypochlorite solutions is disclosed along with the process for its use. The catalyst is prepared by sintering a powdered mixture of a particular metal oxide or hydroxide and a thermoplastic polyolefin or halogenated polyolefin.
    Type: Grant
    Filed: August 21, 1985
    Date of Patent: April 7, 1987
    Assignee: Pennwalt Corporation
    Inventors: Roger T. Clark, David M. Gardner