Patents by Inventor James L. Callahan

James L. Callahan 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: 4280929
    Abstract: A method for preparing attrition resistant, high percentage active component catalysts comprises using two types of silica, one of which is fumed silica, in a two stage catalyst preparation.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: July 28, 1981
    Assignee: Standard Oil Company
    Inventors: Wilfrid G. Shaw, Christos Paparizos, James L. Callahan
  • Patent number: 4171454
    Abstract: Catalysts having a substantially spherical shape, a void center and a hole in the external surface communicating to the void center have been found to be especially effective in the oxidation of monoolefins to the corresponding unsaturated oxygenated compounds.
    Type: Grant
    Filed: April 10, 1975
    Date of Patent: October 16, 1979
    Assignee: The Standard Oil Company
    Inventors: Arthur F. Miller, James L. Callahan, Wilfrid G. Shaw
  • Patent number: 4152393
    Abstract: A reactor that consists of a single shell that contains a reaction zone and a regeneration zone. The reaction zone and regeneration zone are arranged in such a manner that (a) a particulate solid may be transferred by flow of gases from the regeneration zone to the reaction zone by a first route and then back to the regeneration zone by a second route; and (b) the gases passing through the regeneration zone are not transferred to the reaction zone and the gases passing through the reaction zone are not transferred to the regeneration zone.
    Type: Grant
    Filed: January 12, 1977
    Date of Patent: May 1, 1979
    Assignee: The Standard Oil Company
    Inventors: James L. Callahan, Harley F. Hardman, Ernest C. Milberger
  • Patent number: 4065507
    Abstract: The present invention relates to a process for the conversion of tertiary-butyl-containing compounds to methacrylic derivatives, and more particularly to a process for the conversion of tertiary-butyl-containing compounds selected from the group consisting of alkyl tertiary-butyl ethers, tertiary-butyl alcohol, isobutylene dimer (2,2,4-trimethylpentene) and isobutylene trimer, to methacrolein, methacrylic acid or methacrylonitrile.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: December 27, 1977
    Assignee: Standard Oil Company
    Inventors: Harley F. Hardman, James L. Callahan, Robert K. Grasselli
  • Patent number: 4042153
    Abstract: Distinct droplets of a slurry are dispersed by a dropping device consisting of a resilient tube connected to a liquid reservoir so that the liquid flows through the tube, and two valves and a plunger which work in a six-movement cycle on the outer surface of the resilient tube to discharge uniform droplets of liquid at equal drop intervals.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: August 16, 1977
    Assignee: Standard Oil Company
    Inventors: James L. Callahan, Arthur F. Miller, Wilfrid G. Shaw
  • Patent number: 3966639
    Abstract: Hard, rounded aggregates are produced by preparing droplets of a slurry consisting of suspending liquid containing distinct particles of a solid and dropping the droplets of the slurry onto a bed of particles under conditions where the suspending liquid of the slurry droplet is removed. This technique is especially desirable for making unique fixed-bed catalysts.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: June 29, 1976
    Assignee: Standard Oil Company
    Inventors: James L. Callahan, Arthur F. Miller, Wilfrid G. Shaw
  • Patent number: 3933751
    Abstract: Olefinic aldehydes such as acrolein are produced by the oxidation of an olefin such as propylene in the presence of an antimony oxide-uranium oxide catalyst containing at least one of a number of specified promoter elements.
    Type: Grant
    Filed: May 7, 1971
    Date of Patent: January 20, 1976
    Assignee: The Standard Oil Company
    Inventors: James L. Callahan, Robert K. Grasselli, Warren R. Knipple
  • Patent number: 3932551
    Abstract: Catalysts containing molybdenum, bismuth, iron and nickel, cobalt, magnesium, zinc, cadmium, manganese, calcium or mixture thereof are promoted by chromium, tellurium, germanium, tungsten, manganese, thorium, niobium, praseodymin, cerium, lanthanum, zinc or mixture thereof to give highly desirable catalysts for the oxidative dehydrogenation of olefins of 4 to about 10 carbon atoms.
    Type: Grant
    Filed: October 12, 1973
    Date of Patent: January 13, 1976
    Assignee: The Standard Oil Company
    Inventors: Robert K. Grasselli, Dev. D. Suresh, James L. Callahan
  • Patent number: RE30569
    Abstract: Hard, rounded aggregates are produced by preparing droplets of a slurry consisting of suspending liquid containing distinct particles of a solid and dropping the droplets of the slurry onto a bed of particles under conditions where the suspending liquid of the slurry droplet is removed. This technique is especially desirable for making unique fixed-bed catalysts.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: April 7, 1981
    Assignee: The Standard Oil Company (Ohio)
    Inventors: James L. Callahan, Arthur F. Miller, Wilfrid G. Shaw