Patents Represented by Attorney William D. Lee

Find this attorney in the Justia Lawyer Directory

  • Multiple-layer, cook-in film
    Patent number: 4855183
    Abstract: Disclosed is a multiple-layer cook-in film from which packages such as bags or casings can be made. The films have a first food contact layer that bindingly adheres during cook-in to a contained meat product. The first layer comprises a polyamide composition, which is preferably (I) a polyamide or (II) a blend of a polyamide and (i) polyethylene, or a blend of a polyamide and (ii) a copolymer of an alpha-olefin having the formula RHC.dbd.CH.sub.2 wherein R is H or C.sub.1 to C.sub.8 alkyl and an alpha,beta-ethylenically unsaturated carboxylic acid.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: August 8, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Timothy T. Oberle
  • Method of making a laminate via corona discharge treatment
    Patent number: 4854999
    Abstract: A multi-stage corona laminator may be used to produce a relatively thick, i.e., 10 mils or greater corona bonded laminate characterized by low dielectric build-up, and preferably the presence of one or more oriented layers within the laminate material.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: August 8, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Henry G. Schirmer
  • Highly formable laminates
    Patent number: 4853287
    Abstract: A laminate useful in thermoforming and VSP processes comprises a surface film, barrier film, and sealant film bonded together by, for example, corona bonding. At least one of the films comprises a hot blown high molecular weight polymeric material. Preferably, at least one of the films is cross-linked by irradiation or chemical cross-linking.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: August 1, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Henry G. Schirmer
  • Eva based multi-layer, heat-shrinkable, packaging film and bags made therefrom
    Patent number: 4853265
    Abstract: Disclosed is a heat-shrinkable, oriented, multi-layer packaging film. The film has at least two layers comprising EVA. One of the EVA layers is of EVA having a melt index different from the melt index of the EVA of the other layer or layers.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: August 1, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Thomas C. Warren
  • Antistatic/conductive container
    Patent number: 4848566
    Abstract: A blow molded container provides protection for electrically sensitive devices by including antistatic agents in the outer layer and electrically conductive agents in the inner layer of a multilayer parison used to form a container. The invention renders the use of separate antistatic foam pads unnecessary by providing an antistatic surface in the container when closed.
    Type: Grant
    Filed: February 22, 1988
    Date of Patent: July 18, 1989
    Assignee: W. R. Grace & Co.
    Inventors: Marvin R. Havens, Robert R. Wilkie
  • Thermoformable barrier sheet
    Patent number: 4847148
    Abstract: Thermoformable barrier sheet includes a barrier film having low oxygen transmission, and a thermoformable plastic, especially a foamed or unfoamed polystyrene sheet bonded thereto. Bonding can be accomplished by corona bonding or by thermal bonding.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: July 11, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Henry G. Schirmer
  • Inter-ply adhesion between saran and linear ethylene copolymers
    Patent number: 4842952
    Abstract: A multilayer film is disclosed having improved adhesion between layers and consisting essentially of the following elements:(a) a layer consisting essentially of vinylidene chloride copolymer; and,(b) a layer consisting essentially of about 5-40 weight percent of ethylene/butyl-acrylate copolymer having a melting point of about 110.degree. C. blended with about 95-60 weight percent of linear ethylene/alpha-olefin copolymer.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: June 27, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Steven B. Garland
  • Oxygen barrier film
    Patent number: 4839235
    Abstract: A coextruded multiple layer oriented film comprises a core layer comprising an ethylene vinyl alcohol copolymer, two intermediate adhesive layers, and two outer layers comprising a polymeric material selected from the group consisting of ethylene butyl acrylate copolymer, and blends comprising at least 10% of said ethylene butyl acrylate copolymer blended with ethylene alpha-olefin copolymers. A preferred embodiment of the multilayer film exhibits high oxygen barrier especially useful in food packaging applications.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: June 13, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Gautam P. Shah
  • Thermoplastic multi-layer packaging film and bags made therefrom
    Patent number: 4837084
    Abstract: Disclosed is a heat-shrinkable film suitable for making bags and pouches. The film has at least one layer comprising a copolymer of ethylene and an alphaolefin with six or more carbon atoms per molecule, said copolymer having a density of about 0.910 g/cc of less and a melt index of about 2 or less.
    Type: Grant
    Filed: July 2, 1987
    Date of Patent: June 6, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Thomas C. Warren
  • Method and apparatus for vacuum packaging and package obtained thereby
    Patent number: 4833862
    Abstract: By providing raised peripheral edges, preferably walls, for the supporting member of a vacuum skin package, a superior vacuum package is achieved when a product is vacuum packaged on such a supporting number. Wrinkles and weak spots are avoided. Preferably, the raised edges are formed in-line as the package is made.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: May 30, 1989
    Assignee: W. R. Grace & Co. - Conn.
    Inventors: Ermanno Bortolani, Enzo Vassarotti
  • Low shrink energy films
    Patent number: 4833024
    Abstract: The multilayer shrink film of the present invention provides very low shrink tension approximating some PVC films, while providing relatively high free shrink characteristics and relatively low shrink temperatures. The preferred film has five layers including a core layer comprising a linear low density polyethylene or ethylene propylene copolymer, two outer layers comprising a polymeric material selected from the group consisting of linear low density polyethylene and ethylene propylene copolymer, and two intermediate layers comprising a polymeric material or blend of materials having a melting point of less than 100.degree. C. Suitable materials include ethylene vinyl acetate copolymer, a blend of ethylene vinyl acetate copolymer and very low density polyethylene, ethylene butyl acrylate copolymer, and a blend of ethylene vinyl acetate copolymer and ethylene butyl acrylate copolymer.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: May 23, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Walter B. Mueller
  • Monoaxial shrink film
    Patent number: 4828928
    Abstract: A coextruded multiple layer film is oriented in primarily the longitudinal direction, and comprises a core layer comprising high density polyethylene, outer layers comprising ethylene propylene copolymer, polypropylene, or blends thereof, and intermediate layers which bond the outer layers to the cure layer and comprise an ethylene copolymer.
    Type: Grant
    Filed: December 17, 1986
    Date of Patent: May 9, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Gautam P. Shah
  • Film folding device, method, and product
    Patent number: 4827694
    Abstract: Disclosed herein is a machine for wrapping filled trays in thermoplastic film, said machine having a film folding device in which the side folding arms and back folding bar move along linear paths in synchronized motion so that the points of coincidence between the back folding bar and the side folding arms define a curve which approximates a diagonal to the tray being wrapped. This film folding device provides uniquely smooth folds on the bottom of a tray which can be readily heat sealed to produce a relatively leakproof package.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: May 9, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Dave L. Owen, Robert E. Jahn
  • Sheets materials of HB polymers
    Patent number: 4826493
    Abstract: HB polymers, such as copolymers of hydroxy butyric acid and hydroxy valeric acid, are provided as melt extruded films having a thickness of 5 to 200 .mu.m. Sheet materials may consist of such a film or the film may be laminated with other films to increase strength or impermeability. The films are best made by co-extrusion with a thermoplastic that is substantially non-tacky upon solidification. The sheet materials are of particular value as diaper backsheets and ostomy bags. They may include a layer of non-woven material.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: May 2, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Francesco Martini, Luigi Perazzo, Paolo Vietto
  • Thermoplastic packaging film of low I.sub.10 /I.sub.2
    Patent number: 4820557
    Abstract: Disclosed is a high abuse-resistance film suitable for making bags and pouches. The film has at least one layer comprising a linear copolymer of ethylene and an alpha-olefin with a density of about 0.935 g/cc or less. The copolymer has a comparatively lower I.sub.10 /I.sub.2 ratio than the corresponding ethylene/alpha-olefin with the same comonomer and essentially the same density and essentially the same melt index at condition 190/2.16.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: April 11, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Thomas C. Warren
  • Method of storing electrostatic discharge sensitive devices
    Patent number: 4817263
    Abstract: A storage container for electrostatic discharge sensitive devices comprises an enclosable polymeric outer shell, a polymeric inner shell disposed within the outer shell, grooves in the inner shell for accommodating electrostatic discharge sensitive devices, and means for affixing the inner shell to the outer shell.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: April 4, 1989
    Assignee: W.R. Grace & Co.
    Inventors: Dennis C. Donalson, Robert R. Wilkie
  • Vacuum skin package for closing two moisture impervious metallic sheets about a product
    Patent number: 4815602
    Abstract: A vacuum skin package, having a peripheral area and a central area, comprises a thermoplastic supporting member; a thermoplastic heat-formed top web sealed to the supporting member in the peripheral area of the package; a first moisture impervious metallic sheet having outer and inner non-heat sealable surfaces; a second moisture-impervious metallic sheet having outer and inner non-heat sealable surfaces; the first and second sheets unbonded to each other and substantially enclosing therebetween a product in the central area of the package; and the product and enclosing sheets disposed between and enclosed by the supporting member and top web, the top web in comunication with the outer non-heat sealable surface of the first sheet, and the supporting member in communication with but unbonded to the outer non-heat sealable surface of the second sheet.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: March 28, 1989
    Assignee: W.R. Grace & Co.
    Inventor: Henry G. Schirmer
  • Chemically stabilized film
    Patent number: 4816343
    Abstract: In a multilayer flexible film sutable for medical solution packaging, film-derived extractables are controlled by the use of a small amount of a high molecular weight stabilizer in the outer layer of the film. Solution pH can be controlled by the addition of a carbonate of an alkali metal to at least one intermediate adhesive layer and/or the core layer of the film.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: March 28, 1989
    Assignee: W. R. Grace & Co.
    Inventors: Walter B. Mueller, Henry G. Schirmer
  • Easy-open flexible pouch and apparatus and method for making same
    Patent number: 4808010
    Abstract: A pouch and a method and apparatus for forming an easy open pouch in a vertical form-fill-seal process wherein a pouch is formed from a sheet of thermoplastic film and a heat seal between pouches as they are filled serves as the top closure for the lower pouch and a bottom closure for the upper pouch, the easy open feature being provided by a U-shaped portion having a plurality of seal ribs, and a tear initiation notch.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: February 28, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Dennis J. Vogan
  • Multilayer laminate of self supporting films
    Patent number: 4803122
    Abstract: Discrete, self-supporting films are adhered together to form a unique laminate. The surface or outer self-supporting films comprise heat-sealable thermoplastic material, and one interior self-supporting film is adhered to one outer films and comprises an oxygen barrier material. An optional interior film may be adhered to the barrier film to add strength to the laminate. At least one of the films is oriented and the laminate has a thickness of at least about 10 mils. A preferred method of bonding or adhering the films together is by means of corona discharge treatment. The resulting film is characterized by shrinkability and high strength.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: February 7, 1989
    Assignee: W. R. Grace & Co.
    Inventor: Henry G. Schirmer