Patents Assigned to Hercules
  • Patent number: 4861376
    Abstract: Stable high solids dispersions of ketene dimer are provided by using water soluble carboxylic acid, e.g. acetic acid with cationic starch, sodium lignin sulfonate and aluminum sulfate.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: August 29, 1989
    Assignee: Hercules Incorporated
    Inventors: Derek W. Edwards, David F. Townsend
  • Patent number: 4855212
    Abstract: Disclosed are improved photopolymerizable compositions which can be developed using aqueous media. The improved compositions contain cellulosic ethers which impart an unexpected improvement in tent strength and optionally contain a plasticizer and a photochemically polymerizable carboxylic acid monomer or both which aid adhesion and stripping.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: August 8, 1989
    Assignee: Hercules Incorporated
    Inventors: Marilyn Tate, Daniel F. Varnell
  • Patent number: 4853442
    Abstract: Novel sulfur containing polyarylene polyether oligomers are disclosed. The oligomers are prepared through condensing salts of hydroxy and/or thio aromatic compounds, halobenzenoid compounds bearing two replaceable halogens and metal or ammonium sulfides following by end capping the resultant oligomer intermediate with a salt of a hydroxy and/or thio aromatic compound.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: August 1, 1989
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 4853437
    Abstract: This invention relates to a novel composition comprising a water- and caustic-insoluble, inswellable, fibrous, particulate polymer comprising cross-linked units of a water-soluble polymer and a water-soluble cationic poly(diallylamine)-epichlorohydrin resin. This polymer is useful as an exchange resin, tablet disintegrant, thickener and suspending aid.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: August 1, 1989
    Assignee: Hercules Incorporated
    Inventors: Carl A. Lukach, Arjun C. Sau
  • Patent number: 4850834
    Abstract: This invention relates to a retread curing ring apparatus for mounting on a tire retread assembly which comprises a tire carcass having a retread area, integral side walls with inner edges, a preformed tread strip positioned on the retread area, and a flexible envelope or bag surrounding the entire retread assembly. The retread curing ring apparatus is positioned adjacent to each side of the tire carcass. The curing ring apparatus comprises a circular body with a recess adjacent to its bottom edge and positioned in said recess a circular elastomeric gasket having a channel at its bottom edge for attachment to the curing ring. The gasket is prepared from a plastic or rubber material and comprises a plurality of circumferential ribs adjacent the bead of the tire carcass which enables the clamp assemblies mounted circumferentially on the curing ring to hold the curing ring and the tire assembly in an airtight engaged position during the retread process.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: July 25, 1989
    Assignee: The Hercules Tire and Rubber Company
    Inventors: Wilburn W. Hinson, David D. Inman, Dennis A. Russell
  • Patent number: 4844263
    Abstract: A food container comprises top and bottom members, with the bottom member including a lower base wall and an upwardly extending side wall. Spaced apart downwardly extending depressions are formed in the lower base wall, and each of these depressions has an inside wall surface spaced inwardly from the surrounding side wall. The inside wall surfaces of the depressions collectively define an outline, and the top member has a raised central portion the outline of which is substantially identical to but slightly smaller than the outline defined by the depressions. This relationship enables the raised central portion of the top lid member to interlockingly fit between the depressions when assembled food containers are stacked one above the other. The raised central portion of the top lid member has less height than the depressions which spaces the lower base wall from the raised central portion when assembled containers are stacked.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: July 4, 1989
    Assignee: Hercules, Incorporated
    Inventor: Frederick Hadtke
  • Patent number: 4842875
    Abstract: A container providing controlled atmospheric storage of fresh fruits and vegetables to improve retention of product freshness by adjusting the carbon dioxide to oxygen ratio, for the storage of said fruits or vegetable can be attained and maintained, thereby retarding premature maturation and spoilage. The environment is controlled by providing a microporous membrane panel of limited carbon dioxide and oxygen permeability on an otherwise substantially impermeable container. The size of this area is a function of its permeability, the amount and respiration rate of the contents, and the ratio of carbon dioxide to oxygen desired.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: June 27, 1989
    Assignee: Hercules Incorporated
    Inventor: Harry S. Anderson
  • Patent number: 4837078
    Abstract: A wipe material capable of retaining opposed wet and dry facings characterized by (A) a wet facing comprising one or more fiber- or fiber-like-web(s) having hydrophilic/hydrophobic component blends of indicated wt. % ranges and denier and (B) a dry facing comprising one or more fiber- or fiber-like-webs containing one or more hydrophobic components of mixed denier not exceeding a given denier; and a method for obtaining the same.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: June 6, 1989
    Assignee: Hercules Incorporated
    Inventor: James H. Harrington
  • Patent number: 4835230
    Abstract: Disclosed is an improved method for making a thermoset polymer wherein a plurality of reactant streams, one of which contains the activator of a metathesis catalyst system combined with a moderator, and a second of which contains the catalyst of the metathesis catalyst system and at least one of which contains dicyclopentadiene are combined to form a reaction mixture, and the reaction mixture is then injected into a mold where polymerization occurs. The improvement comprises adding to the reaction mixture 1-25 mols of a cationic polymerization initiator per 1000 mols of dicyclopentadiene.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: May 30, 1989
    Assignee: Hercules Incorporated
    Inventors: Nitya P. Khasat, Birendra K. Patnaik
  • Patent number: 4833941
    Abstract: A compact system for converting a rotational movement, of relatively low torque, into an accurate linear movement, of relatively high force. The system includes a low torque actuator and a backlash-free gear reducer. A linearly movable shaft, capable of exerting a high linear force in either direction, has a long axis in direct line with the long axis of the actuator. A direct linkage, essentially free of backlash, connects the actuator to the shaft through the gear reducer. A body and housing enclose the system.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: May 30, 1989
    Assignee: Devron-Hercules Inc.
    Inventors: Seppo I. Leppanen, V. Erik Kumpa, Richard S. McDiarmid
  • Patent number: 4826970
    Abstract: New anianic, water-soluble cellulose ether derivatives, in particular, carboxymethyl hydrophobically modified hydroxyethylcellulose (CMHMHEC), which are useful as thickeners in aqueous solutions, e.g., water-based protective coating compositions such as latex paints, as well as aqueous solutions, including water-based protective coating compositions containing these ternary cellulose ethers as thickeners and protective coloids, are disclosed. The cellulose ether derivatives are characterized in that they have a Brookfield LVF Viscosity of about 5 centipoise to about 60,000 centipoise in a 1 weight % solution.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: May 2, 1989
    Assignee: Hercules Incorporated
    Inventors: Albert R. Reid, Richard D. Royce, Jr.
  • Patent number: 4826942
    Abstract: Disclosed is a method of reducing the activation rate of an alkyl aluminum activator in the metathesis polymerization of polycyclic cycloolefins. Activation rate is reduced by use of a bidentate Lewis base as the reaction rate moderator.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: May 2, 1989
    Assignee: Hercules Incorporated
    Inventor: Lawrence L. Nelson
  • Patent number: 4822839
    Abstract: A polyunsaturated hydrocarbon polymer-compatible anti-oxidant composition is provided which comprises a mixture of at least one sterically hindered phenolic compound and at least one aryl amine compound in a molar ratio ranging from about 0.1 to about 10.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: April 18, 1989
    Assignee: Hercules Incorporated
    Inventor: Martin J. Paisner
  • Patent number: 4822832
    Abstract: Described are novel thermosetting epoxy resin compositions suitable for making cured resins, prepregs and stiff, tough thermoset composites. The thermosetting compositions comprise a polyepoxide component, an amine hardner and a specified amount of certain aromatic oligomers containing functional groups which are reactive with the polyepoxide and/or hardener under curing conditions for the composition. The cured resins have a multiphase morphology which comprises at least one glassy continuous phase and at least one glassy discontinuous phase and have a fracture toughness, K.sub.IC, of at least 1.0 MPam.sup.1/2.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: April 18, 1989
    Assignee: Hercules Incorporated
    Inventors: Sung G. Chu, Harold Jabloner, Brian J. Swetlin
  • Patent number: 4820519
    Abstract: Plant material such as tobacco is protected during storage by enveloping the plant material in a thin film that is composed of a polymeric material and isopropyl-(E,E)-11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate (hereinafter referred to as "methoprene"). Air moves within the envelope carrying methoprene that has migrated from the surface of the film to the surface of the plant material. The thin film is a biaxially oriented polyolefin that has a thickness of from 0.01 to 0.2 mm and has from about 100 to 20,000 ppm of said methoprene incorporated therein.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: April 11, 1989
    Assignee: Hercules Incorporated
    Inventor: Paul C. Gillette
  • Patent number: 4818435
    Abstract: It has been found that water stable articles, such as films and sheets, can be prepared from chemically delaminated vermiculite platelets if radical or ionically polymerizable organo-substituted onium salts are ionically bonded to the platelets and the resulting system cured.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: April 4, 1989
    Assignee: Hercules Incorporated
    Inventor: Alexander Lukacs, III
  • Patent number: 4813715
    Abstract: End connectors of filament wound tubes are disclosed. The end connector uses an upset region at the end of the filament wound tube as a base in mounting a threaded retaining ring around the tube. The retaining ring is threaded to a housing mounted also around this upset region. The housing carries means for connecting the filament wound tube to another body and forming a pressure seal between the liner (optional) of the tube and the tip end of sleeve inserted beneath the upset region.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: March 21, 1989
    Assignee: Hercules Incorporated
    Inventor: Frederick J. Policelli
  • Patent number: 4812519
    Abstract: The modification of thermoplastic polymers with a combination of azidosilanes and monolefinically unsaturated monomers and subsequent crosslinking by moisture.
    Type: Grant
    Filed: October 15, 1987
    Date of Patent: March 14, 1989
    Assignee: Hercules Incorporated
    Inventor: Paul C. Gillette
  • Patent number: 4811745
    Abstract: Method for controlling delivery of by-products found in cigarette smoke by utilizing a cigarette filter element comprising one or more substrates treated with an effective amount of at least one of (A) zinc chloride, ferrous bromide, calcium bromide, zinc thiocyanate, sarcosine hydrochloride and manganese sulfate; alone or combined with (B) glyceryl triacetate; plus corresponding filter element(s) and cigarette(s) utilizing such filter element(s).
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: March 14, 1989
    Assignee: Hercules Incorporated
    Inventors: Richmond R. Cohen, David J. Gibboni
  • Patent number: 4812260
    Abstract: Disclosed is an improved process for producing dispersions of vermiculite ore particles by intercalating organo-cation salts into the vermiculite structure under shearing conditions to delaminate the ore and reduce particle size in one step.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: March 14, 1989
    Assignee: Hercules Incorporated
    Inventor: Lawrence L. Nelson