Patents by Inventor Charles R. Ashcraft

Charles R. Ashcraft has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5435326
    Abstract: A smoking article having a controlled yield of wet particulate matter and a method of making a smoking article with predetermined total and per puff yields of wet particulate matter. The smoking article has a tobacco rod connected to an air ventilated compound filter having two abutted filter segments, a rod end segment with a passage therethrough and a mouth end segment. The pressure drop of the abutment interface between the segments is selected to be in a range of from about 10 mm to about 100 mm water gauge. The total pressure drop of the filter including the interface and the amount of air dilution can be selected to provide a smoking article with a level per puff yield or a decreasing per puff yield.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: July 25, 1995
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Thomas L. Gentry, Russell D. Barnes, Richard L. Blakley, Charles R. Ashcraft, Juanilla M. Gwyn, James W. Pryor, Henry T. Ridings, Milly M. L. Wong
  • Patent number: 5396909
    Abstract: A cigarette smoking article includes a tobacco rod and a dual filter comprising a tobacco rod end segment made of cellulose acetate tow and a mouth end segment made of a gathered, perforated polymeric film blended with a whitener to produce a substantially non-staining mouth end surface. The polymeric film may also comprise a coextruded flavor film with a flavor carrier layer disposed between a pair of barrier layers for releasing a flavorant into the mainstream smoke during smoking of the cigarette. Transparent wraps may be used to construct the cigarette from the component parts so that the filtration surfaces of the filter rod are visible through the wraps.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: March 14, 1995
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Thomas L. Gentry, William M. Coleman, III, Charles R. Ashcraft, Dennis L. Carespodi, Milly M. L. Wong
  • Patent number: 5249676
    Abstract: A flavor burst structure and a method of dispersing a flavorant are disclosed. The flavor burst structure comprises a multilayer film with a flavor carrier layer disposed between barrier layers. The flavor carrier layer comprises a polymeric material blended with a flavorant that is not compatible or is partially incompatible with the polymeric material so that the flavorant desorbs from the carrier layer when one of the barrier layers is removed from the carrier layer. Several package applications are disclosed, including a cigarette package, package tear tapes and the like.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: October 5, 1993
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Charles R. Ashcraft, Milly M. L. Wong
  • Patent number: 4758462
    Abstract: An opaque, biaxially oriented film structure is described which comprises:an expanded thermoplastic polymer matrix core layer within which is located a minor amount of a light-absorbing pigment and a strata of voids; positioned at least substantially within at least a substantial number of said voids is at least one void-initiating particle which is phase distinct and incompatible with the matrix material, the void space occupied by said particle being substantially less than the volume of said void, with one generally cross-sectional dimension of said particle, at least approximating a corresponding cross-sectional dimension of said void; the population of voids in said core and the thickness of said core being such as to cause a degree of opacity of less than 15% light transmission; andat least one void-free thermoplastic skin layer affixed to a surface of the core layer, said skin layer(s) being of a thickness such that the outer surfaces thereof do not, at least substantially, manifest the surface irregul
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: July 19, 1988
    Assignee: Mobil Oil Corporation
    Inventors: Hee C. Park, Joseph J. Spitz, Charles R. Ashcraft
  • Patent number: 4650721
    Abstract: The film resulting from and the process for forming a firmly bonded film laminate combination comprising, preparing an intimate combination I of polypropylene and a maleic acid anhydride modified olefin polymer; forming a film of at least one layer of said combination I with at least one layer of a polymer II selected from the group consisting of polyvinyl alcohol and an ethylene-vinyl alcohol copolymer; and effecting adhesion between the layers by orienting the film.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: March 17, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Charles R. Ashcraft, Michael L. Kerr
  • Patent number: 4496620
    Abstract: An opaque oriented non-thermoplastic polymer film containing opacifying voids which opacifying voids contain rigid microspheres therein. The method of preparing such an opaque oriented non-thermoplastic film by incorporating rigid microspheres within the non-thermoplastic polymer forming a film thereof and orienting the same to create opacifying voids therein.
    Type: Grant
    Filed: November 25, 1983
    Date of Patent: January 29, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Hee C. Park, Charles R. Ashcraft
  • Patent number: 4476073
    Abstract: Method and system for orienting a multilayer polymeric film structure by differentially heating the films so that orientation at their respective optimal temperatures is achieved.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: October 9, 1984
    Assignee: Mobil Oil Corporation
    Inventor: Charles R. Ashcraft
  • Patent number: 4472330
    Abstract: A method and system are disclosed for orienting a multilayer polymeric film structure by differentially heating different film layers thereof by dielectric heating and then molecular orienting the film layers at their respective optimal orientation temperatures.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: September 18, 1984
    Assignee: Mobil Oil Corporation
    Inventor: Charles R. Ashcraft
  • Patent number: 4438175
    Abstract: An ink receptive synthetic film structure formed by delaminating the void containing a matrix material and the method of preparing the same.
    Type: Grant
    Filed: April 28, 1983
    Date of Patent: March 20, 1984
    Assignee: Mobil Oil Corporation
    Inventors: Charles R. Ashcraft, Kurt D. Albertson
  • Patent number: 4377616
    Abstract: The present invention is directed to an opaque, biaxially oriented polymeric film structure of lustrous satin appearance comprising a thermoplastic core matrix having a strata of voids; said voids being created by the inclusion within the matrix material of spherical void-initiating solid particles which are incompatible with the matrix material. The void space occupied by the particle is substantially less than the volume of the void. The polymer matrix material is extruded in the form of a film and positioned on opposite surfaces of the film are void free, transparent thermoplastic skin layers adhering to said surfaces. The structure has excellent opacity and extremely high gloss measurement and a lustrous satin appearance.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: March 22, 1983
    Assignee: Mobil Oil Corporation
    Inventors: Charles R. Ashcraft, Hee C. Park