Patents by Inventor John M. Macdonald

John M. Macdonald 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: 11931469
    Abstract: An absorbent article comprising an absorbent member positioned between a topsheet and a backsheet is provided. The absorbent member contains at least one layer that comprises porous superabsorbent particles, wherein the particles exhibit a relative humidity microclimate of about 67% or less after being exposed to an atmosphere having a temperature of about 23° C. and relative humidity of 80% for a time period of 20 minutes.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 19, 2024
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Yuriy Galabura, Mark M. Mleziva, John Gavin MacDonald, Vasily A. Topolkaraev, Michelle McBride, Karien J. Rodriguez, Matthew Valaskey, Dave Soerens, Neil T. Scholl, WanDuk Lee
  • Patent number: 6810715
    Abstract: A test plug for in-situ testing a glove installed in a glovebox is provided that uses a top plate and a base plate, and a diametrically expandable sealing mechanism fitting between the two plates. The sealing mechanism engages the base plate to diametrically expand when the variable distance between the top plate and the bottom plate is reduced. An inlet valve included on the top plate is used to introducing a pressurized gas to the interior of the glove, and a pressure gauge located on the top plate is used to monitor the interior glove pressure.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: November 2, 2004
    Assignee: The Regents of the University of California
    Inventors: Julio M. Castro, John M. Macdonald, Warren P. Steckle, Jr.
  • Publication number: 20040149014
    Abstract: A test plug for in-situ testing a glove installed in a glovebox is provided that uses a top plate and a base plate, and a diametrically expandable sealing mechanism fitting between the two plates. The sealing mechanism engages the base plate to diametrically expand when the variable distance between the top plate and the bottom plate is reduced. An inlet valve included on the top plate is used to introducing a pressurized gas to the interior of the glove, and a pressure gauge located on the top plate is used to monitor the interior glove pressure.
    Type: Application
    Filed: February 3, 2003
    Publication date: August 5, 2004
    Inventors: Julio M. Castro, John M. MacDonald, Warren P. Steckle
  • Patent number: 5734323
    Abstract: A method and apparatus for continuous real-time monitoring of the integrity of protective barrier materials, particularly protective barriers against toxic, radioactive and biologically hazardous materials has been developed. Conductivity, resistivity or capacitance between conductive layers in the multilayer protective materials is measured by using leads connected to electrically conductive layers in the protective barrier material. The measured conductivity, resistivity or capacitance significantly changes upon a physical breach of the protective barrier material.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: March 31, 1998
    Assignee: The Regents of the University of California
    Inventors: Robert E. Hermes, David R. Ramsey, Joseph F. Stampfer, John M. Macdonald
  • Patent number: 5158671
    Abstract: A method is described for rendering total liquid product hydroisomerates daylight stable and improving their oxidation stability, which method involves treating the hydroisomerate total liquid product with a Group VIII metal on refractory metal oxide catalyst or Group VIII metal on halogenated refractory metal oxide catalyst under mild conditions, which conditions are a temperature in the range of 170.degree. to 270.degree. C., a pressure in the range of 300 to 1500 psi H.sub.2, 0.25 to 10 v/v/hr and 500 to 10,000 SCF/B,H.sub.2.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: October 27, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Ian A. Cody, Donald T. Eadie, John M. MacDonald, Glen P. Hamner
  • Patent number: 4367152
    Abstract: A hydrocarbon composition such as a lubricating or specialty oil containing a selected heteroaromatic nitrogen compound as an antioxidant/metal deactivator/electrical insulator having the following general formula: ##STR1## wherein each X is C or N with at least one X being N; Y is C or N; R is H or CH.sub.2 NR"'.sub.2 where each R" is H or alkyl of 1 to 20 carbons; R' is H, SR"' OR "' or NR"'.sub.2 with each R"' being H or alkyl of 1 to 20 carbons.
    Type: Grant
    Filed: July 2, 1981
    Date of Patent: January 4, 1983
    Assignee: Exxon Research and Engineering Co.
    Inventors: Peter G. Wright, John M. MacDonald, Gerald A. MacAlpine
  • Patent number: 4028224
    Abstract: Process for the preparation of low pour point lubricating oils comprising:I. vacuum distilling a heavy naphthenic crude oil feedstock containing from about 2 to 10 weight % of sulfur based on the weight of the feedstock, said feedstock exhibiting a specific gravity ranging from about 5.degree. to 20.degree. API to obtain at least one distillate cut exhibiting a boiling range of from about 500.degree. to 1000.degree. F and a specific gravity ranging from about 10.degree. to 25.degree. APIii. hydrocracking said distillate cut in at least one hydrocracking zone in contact with a hydrocracking catalyst at a temperature from about 650.degree. to 850.degree. F, a hydrogen partial pressure of about 500 to 5000 psig. and a space velocity of from about 0.1 to 2.0 V/V/Hr;Iii. removing the low boiling light ends from the hydrocrackate; andIv. recovering a low pour point lubricating oil.
    Type: Grant
    Filed: December 17, 1975
    Date of Patent: June 7, 1977
    Assignee: Exxon Research and Engineering Company
    Inventors: John M. MacDonald, Robert Kartzmark
  • Patent number: 3948543
    Abstract: The invention comprises a suspension system for a motorcycle or the like wherein the rear wheel suspension spring is connected to the frame in such a manner that upward impacts received by the rear tire are reacted on the frame in a substantially horizontal direction rather than vertically as in conventional motorcycles so that the pitching motion and vertical thrust on the rear end of the motorcycle is considerably reduced over rough terrain, a feature which is particularly advantageous in offroad racing.
    Type: Grant
    Filed: January 24, 1975
    Date of Patent: April 6, 1976
    Inventors: John M. Macdonald, Charles J. Macdonald