Patents by Inventor John B. Appleby

John B. Appleby 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).

  • Process for reversibly absorbing acid gases from gaseous mixtures
    Patent number: 5338521
    Abstract: A process is disclosed for reversibly absorbing acid gases from gaseous mixtures wherein a salt hydrate is heated to a temperature above its melting point and exposed to an acid gas which is absorbed by the salt hydrate to form a salt hydrate melt. This melt is thereafter cooled to a temperature sufficient to solidify the melt and to desorb the acid gas from the solidified salt hydrate. Preferred salt hydrates include tetramethylammonium fluoride tetrahydrate and tetraethylammonium acetate tetrahydrate.
    Type: Grant
    Filed: November 10, 1992
    Date of Patent: August 16, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert Quinn, Guido P. Pez, John B. Appleby
  • Polyelectrolyte membranes for the separation of acid gases
    Patent number: 5336298
    Abstract: Acid gases are separated from a gas stream by bringing the gas stream into contact with a multilayer composite membrane comprising a nonselective polymeric support layer and an active separating layer comprising a polyelectrolyte polymer which contains cationic groups which are electrostatically associated with anions for which the pK.sub.a of the conjugate acid is greater than 3.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: August 9, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert Quinn, Daniel V. Laciak, John B. Appleby, Guido P. Pez
  • Molten salt hydrate membranes for the separation of gases
    Patent number: 4780114
    Abstract: The present invention is a membrane and a process for separating at least one component from at least one other component in a gas mixture. A gaseous mixture is passed over a membrane having a thin film of a molten salt hydrate which is selectively permeable to at least one component in the gaseous mixture.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: October 25, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert Quinn, Guido P. Pez, John B. Appleby