Patents by Inventor Richard L. Lehman

Richard L. Lehman 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: 5211684
    Abstract: The present invention is directed to cigarettes and other smoking articles which contain a catalytic composition, preferably as part of the fuel element, that substantially decreases the amount of carbon monoxide contained in the mainstream smoke during smoking. The present invention also relates to the catalyst-containing carbonaceous fuels themselves, as well as to methods of making such carbonaceous fuels. Fuel elements which contain a catalytic composition in accordance with the presentation are especially useful in smoking articles having an aerosol generating means which is physically separate from the fuel element.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: May 18, 1993
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Michael D. Shannon, Richard L. Lehman, James L. Resce, Olivia P. Furin, Joseph T. Meers, Dennis M. Riggs, Ernest G. Farrier
  • Patent number: 5105836
    Abstract: A combustible smokable filler material includes an agglomerated matrix filler having an inorganic component (e.g., particles of calcium carbonate) and a carbonaceous component (e.g., calcined molasses). The smokable filler material includes a binding agent and an aerosol forming material. Tobacco extracts and/or pieces of tobacco laminae can be incorporated into the smokable filler material, and/or the smokable filler material can be blended with tobacco cut filler. Cigarettes are provided by wrapping the smokable filler material in a paper wrapping material. A typical paper wrapping material has a porosity of less than about 5 CORESTA units.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: April 21, 1992
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Jeffery S. Gentry, Gary R. Shelar, Richard L. Lehman, James L. Resce, Olivia D. Furin, Stephen W. Jakob, William C. Squires
  • Patent number: 5103844
    Abstract: Cigarettes have a tobacco rod including smokable material circumscribed by a paper wrapper. The paper wrapper includes a cellulosic base web (e.g., flax and/or wood pulp fibers) and particles of at least one inorganic filler material. The inorganic filler material includes calcium sulfate, and normally fibers of calcium sulfate having an aspect ratio of about 30.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: April 14, 1992
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Rhonda F. Hayden, Elbert C. Jones, Jr., Jerry W. Lawson, Richard L. Lehman, Patricia F. Perfetti
  • Patent number: 5074321
    Abstract: Cigarettes include tobacco-containing smokable material wrapped in a low porosity paper wrapper. The smokable material includes an intimate mixture of tobacco extract, pyrolyzed alpha-cellulose, agglomerated calcium carbonate particles, glycerin and carboxymethylcellulose. Such cigarettes yield low levels of incomplete combustion products and generate low levels of visible sidestream smoke.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: December 24, 1991
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Jeffery S. Gentry, Gary R. Shelar, Michael D. Shannon, Richard L. Lehman, James L. Resce, Rhonda F. Hayden, Olivia D. Furin, Alan B. Norman, Thomas A. Perfetti
  • Patent number: 5060673
    Abstract: Cigarettes include tobacco-containing smokable material wrapped in a low porosity paper wrapper. The smokable material includes an intimate mixture of tobacco extract, pyrolyzed alphacellulose, agglomerated calcium carbonate particles, glycerin and carboxymethylcellulose. The agglomerated calcium carbonate particles are provided by providing an agglomerated matrix of calcium carbonate particles and organic binding agent, and calcining the organic binding agent. The resulting agglomerated matrix includes particles of calcium carbonate within a carbonaceous binding material. Such cigarettes yield low levels of incomplete combustion products and generate low levels of visible sidestream smoke.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: October 29, 1991
    Assignee: R. J. Reynolds Tobacco Company
    Inventor: Richard L. Lehman
  • Patent number: 4827950
    Abstract: The present invention relates to a substrate material having a decreased retentive capacity for use as a carrier for aerosol forming materials in smoking articles which smoking articles are capable of producing substantial quantities of aerosol, both initially and over the useful life of the product, without significant thermal degradation of the aerosol former and without the presence of substantial pyrolysis or incomplete combustion products or sidestream aerosol. Thus, the substrate material of the present invention when used with preferred smoking articles is able to provide the user with the sensations and benefits of cigarette smoking without burning tobacco. In addition, the article may be made virtually ashless so that the user does not have to remove any ash during use.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: May 9, 1989
    Assignee: R. J. Reynolds Tobacco Company
    Inventors: Chandra K. Banerjee, Deborah C. Kay, Richard L. Lehman
  • Patent number: 4526603
    Abstract: The dusting and segregation of the glass batch during the manufacture of opal borosilicate glass can be reduced by adding the phosphorus values to the glass batch as phosphoric acid, and calcium values as limestone, calcium carbonate or calcium oxide.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: July 2, 1985
    Assignee: FMC Corporation
    Inventors: Richard L. Lehman, William H. Manring
  • Patent number: 4374817
    Abstract: The viscosity of phosphate rock slurries is reduced by incorporating in the slurry both sodium tripolyphosphate and an alkaline material, particularly sodium hydroxide. The combined amount of these two materials required to achieve a given viscosity reduction is significantly lower than the weighted average of the amounts required for each to produce individually the same viscosity reduction. The defined alkaline materials, other than sodium hydroxide, are sodium carbonate, ammonium hydroxide and potassium hydroxide.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: February 22, 1983
    Assignee: FMC Corporation
    Inventors: Richard L. Lehman, John A. Shepherd