Patents Represented by Attorney John E. Crowe
  • Patent number: 4626467
    Abstract: A method for minimizing air-quench dependency and improving tolerance to high speed spinning of polyolefin spin melt compositions by incorporating an active amount of polyolefin additive having a Branching Index of about 0.20-0.90; plus corresponding spin melt composition and yarn product.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: December 2, 1986
    Assignee: Hercules Incorporated
    Inventor: Barry J. Hostetter
  • Patent number: 4609415
    Abstract: Method for facilitating the formation and stability of invert water-in-oil emulsion blasting agents by use of a combination of certain surfactants; and corresponding formulations.
    Type: Grant
    Filed: January 19, 1984
    Date of Patent: September 2, 1986
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4574586
    Abstract: Method and device for continuously and automatically maintaining optimal control settings for rich fuel gas generation within the pre-starting, starting, and operational modes of a ducted solid fuel rocket motor, through actual or potential control of pressure within a fuel rich gas generator by use of a temperature sensitive hydraulic/mechanical choke, the mechanical component of which comprises an expansion bellows endwise attached to a spring-biased slidable nozzle valve throat blockage element, and the hydraulic component comprises a temperature-sensitive constant volume fluid reservoir, or its equivalent.
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: March 11, 1986
    Assignee: Hercules Incorporated
    Inventor: Leslie P. Gabrysch
  • Patent number: 4523967
    Abstract: Method of maximizing stability and minimizing production of toxic fumes as explosion by-products by utilizing a moisture resistant blasting composition and said composition, comprising an invert emulsion component having, as the continuous external organic phase thereof, a partial ester of a 2-12 carbon polyhydric alcohol and a tall oil fatty acid, said explosive composition being capable of utilizing sufficient solid oxygen-supplying salt to obtain an Oxygen Balance of about zero without substantial loss of sensitivity.
    Type: Grant
    Filed: August 6, 1984
    Date of Patent: June 18, 1985
    Assignee: Hercules Incorporated
    Inventor: Richard V. Cartwright
  • Patent number: 4521493
    Abstract: A resin-modified fiber filter formulation, fiber filter element, and method for improving dimensional stability, firmness and resiliency of a polyolefin fiber filter element comprised of crimped polyolefin fiber tow, by contacting filaments thereof with a formulation comprising a blend of resin and base polymer emulsions as precursors forming the active formulation "in situ", at a convenient station by removing water, the solid resin component of which must have a low molecular weight and approved softening temperature range to obtain the desired characteristics.Typical resins are polyterpenes and hydrogenated rosin esters; typical base polymers are polyvinyl acetate and copolymers thereof with, e.g., ethylene or acrylates.
    Type: Grant
    Filed: January 12, 1984
    Date of Patent: June 4, 1985
    Assignee: Hercules Incorporated
    Inventor: Jay B. Class
  • Patent number: 4520171
    Abstract: Disclosed is a new class of polymeric hindered amine light stabilizers based on maleic anhydride modified polyolefins reacted with tetramethyl piperidine derivatives. These materials are more effective than most of the generally used hindered amine light stabilizers, but due to their higher molecular weights and the polyolefin backbone, they are more compatible with polyolefins.
    Type: Grant
    Filed: May 5, 1982
    Date of Patent: May 28, 1985
    Assignee: Hercules Incorporated
    Inventors: Diveley William R., Anthony B. Clayton
  • Patent number: 4502814
    Abstract: A method for the deposition of filler materials in filling and overlay applications is disclosed in which there is provided a continuous forced flow of filler material from an external reservoir, which is released through an outlet positionable over a depression in a surface which has been prepared to be filled and overlaid with filler to fill the place of application and overlay the surrounding area. An apparatus for the deposition of such filler is also disclosed.
    Type: Grant
    Filed: December 3, 1982
    Date of Patent: March 5, 1985
    Assignee: Hercules Incorporated
    Inventor: David C. Trimble
  • Patent number: 4490196
    Abstract: A liquid-type low detonation-velocity explosive compositions having reduced shock energy with unhindered bubble energy, and a method for minimizing damage from explosive well stimulation procedure by use of such compositions.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: December 25, 1984
    Assignee: Hercules Incorporated
    Inventor: Richard L. Funk
  • Patent number: 4444109
    Abstract: A flame arrestor device capable of checking flashback when incorporated in a system utilizing one or more detonatable gases under pressure for controlled energy release purposes, the device being generally installed in series having one or more gas sources upstream while gas conducting means and ignition means are arranged downstream of a membrane barrier mounted and secured to a supporting means which is, in turn, mounted within an arrestor housing with provision for gaps of limited size on the upstream and downstream side of the membrane barrier to permit gas flow. The invention includes built in or separate ignition means downstream of the membrane barrier.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: April 24, 1984
    Assignee: Hercules Incorporated
    Inventor: Lincoln S. Gifford, Jr.
  • Patent number: 4442669
    Abstract: A nozzle/valve device for a ducted rocket motor is provided. The nozzle/valve device employs a design in which a nozzle throat blockage element can be moved by rotational motion into and out of the nozzle throat section of the device. The blockage element is designed so that in the closed position the nozzle throat has a minimum cross-sectional flow area and therefore the nozzle throat is never fully closed. The seals employed in the nozzle/valve device are isolated from contact with reaction products of the gas generator and effective use of minimum amounts of erosion resistant materials is achieved.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: April 17, 1984
    Assignee: Hercules Incorporated
    Inventors: William M. Burkes, Jr., William H. Miller
  • Patent number: 4422878
    Abstract: Paving mixtures are disclosed comprised of paving grade asphalt containing about 4 to 10% by weight of a fibrous filler and 2.5 to 15% by weight of a mixture of eighteen carbon fatty acids containing up to about 30% by weight of rosin.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: December 27, 1983
    Assignee: Hercules Incorporated
    Inventor: Frank R. Fry
  • Patent number: 4396045
    Abstract: Apparatus to be used when pouring particulate matter into a container, for substantially eliminating the dust cloud and loss of material associated with particulate matter flow, by allowing for the escape of air while retaining the particulate material in a vessel and dissipating any buildup of electrostatic energy associated with the flow of particulate matter.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: August 2, 1983
    Assignee: Hercules Incorporated
    Inventor: Gilbert E. Cain
  • Patent number: 4343776
    Abstract: Precious metal ozone decomposition catalyst, its stabilization and method for decomposing ozone for purification and detoxification purposes by contacting with a decomposition catalyst containing a platinum group metal and a nonprecious Group VIII metal oxide or aluminate on a support, favoring exposure to ozone of the platinum group metal over the nonprecious metal oxide or aluminate, the arrangement favoring maximum conversion per unit volume and system pressure drop by catalytic element configuration within a given catalyst volume.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: August 10, 1982
    Assignee: Engelhard Corporation
    Inventors: William F. Carr, James M. Chen
  • Patent number: 4324588
    Abstract: This invention relates to an arc erosion-resistant composite material and methods for its manufacture and, more specifically, composite arc erosion resistant materials useful as electrodes in spark plug and jet engine igniters to promote longer useful life. An arc resistant material in particulate form is dispersed throughout a lower melting matrix metal clad in a tube of nickel or nickel alloy, and then worked to a very small outside diameter, after which the composite may be cut to provide electrode elements. Ruthenium and iridium, and their alloys comprise the arc erosion resistant material. Suitable matrix metals comprise silver, gold, copper, nickel, and palladium.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: April 13, 1982
    Assignee: Engelhard Corporation
    Inventors: Edward D. Zysk, Robert Stephans
  • Patent number: 4139030
    Abstract: A device for dispensing ingredients, such as the ingredients for a dental amalgam, has a handle portion and a head portion formed of mating parts with the handle angulated to the head and formed for convenient gripping by the user's hand. A slide mounted in the head slides laterally when pushed by the user's thumb to transport measured ingredients to a common aperture for delivery into a container. The container, when put in place, releases a latch that holds the slide normally in measuring position and prevents transport of the ingredients unless the container is in position to catch them.Adjustment of a measuring chamber for liquid mercury, to accurately proportion it, is by a valve having an end projecting, more or less, into a chamber, so as to vary the volume of the chamber. The position of the valve is controlled by a rectilinearly movable cam whose position may be fixed by a lock nut which normally is inaccessible in a recess in the head portion.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: February 13, 1979
    Assignee: Engelhard Minerals & Chemicals Corporation
    Inventors: Manfred F. Schroeder, Joseph G. Biondo, Joseph Aliotta
  • Patent number: 4126457
    Abstract: A flexible photoreceptor having improved thermal stability and durability and a process for obtaining the photoreceptor by evaporating and condensing selenium-containing photoconductive materials in a profile of increasing arsenic concentration onto a flexible substrate from a plurality of selenium alloy baths of varying concentrations, individually or collectively heated while simultaneously heating and maintaining the temperature of the substrate or interface-substrate layers during evaporation and condensation at no less than the glass transition temperature of the selenium alloy of lowest arsenic concentration to be evaporated from the donor source and not less than about 85.degree. C.
    Type: Grant
    Filed: May 30, 1973
    Date of Patent: November 21, 1978
    Assignee: Xerox Corporation
    Inventor: Anthony J. Ciuffini
  • Patent number: 4092161
    Abstract: A photosensitive member having at least two operative materials. The first material comprises a photoconductive material which is capable of photogenerating and injecting photoexcited holes into a contiguous electronically active material. The electronically active material is catalytically synthesized from vinyl derivatives of suitable polycyclic compounds exemplified by phenyl substituted aromatic or heterocyclic groups such as a phenylnaphthalene, a phenylanthracene, a phenylindole, a phenylpyrene and corresponding polymers thereof, the active material being substantially non-absorbing in the wavelength of xerographic use and capable of transporting photogenerated holes. The photoconductive and electronically active materials may be combined in binder or layered xerographic plate configurations.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: May 30, 1978
    Assignee: Xerox Corporation
    Inventors: Richard W. Radler, Jr., Richard P. Millonzi, John A. Bergfjord
  • Patent number: 4088485
    Abstract: A xerographic plate and photoreceptor having improved speed and image resolution capability comprising a charge generating photoconductor layer, a trapping layer and a profile layer interposed between the trapping and charge generating layers; a suitable profile layer being obtained for xerographic purposes by utilizing materials from the charge generating and trapping layers having different band gaps but applied so as to obtain a gradation or gradient rather than a sharp interface.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: May 9, 1978
    Assignee: Xerox Corporation
    Inventors: Samuel W. Ing, Fred W. Schmidlin
  • Patent number: 4078928
    Abstract: There is disclosed a photoelectrophoretic imaging method wherein, after an image is formed on the surface of an electrode, the image is subjected to an electrical field, under darkened conditions, established between the electrode carrying the image and another electrode to enhance the image.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: March 14, 1978
    Assignee: Xerox Corporation
    Inventor: Carol K. Keller
  • Patent number: 4079421
    Abstract: A system for scanning an amplitude or a phase image and rapidly converting it into a video signal is disclosed. The image is scanned with a focused light beam such as from a laser and the information-modulated light is detected by fixed detectors and converted into a video signal which may then be electronically processed. The method is capable of performing in a scanning mode the same optical processing as is performed by conventional partially coherent optical processing systems. This novel method provides a video signal which represents the processed image. A particularly preferred embodiment comprises simultaneously scanning multiple color encoded surface deformation phase images which together represent a full color original object and generating simultaneously the three video signals that represent the primary colors (red, green and blue) of the original object.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: March 14, 1978
    Assignee: Xerox Corporation
    Inventor: Dorian Kermisch