Patents by Inventor David W. Payling

David W. Payling 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).

  • Anti-allergic mono salt of 6-methylamino-4-oxo-10-propyl-4H-pyrano[3,2-g]-quinoline-2,8-dicarboxyli c acid
    Patent number: 4356181
    Abstract: There is described the mono salt of 6-methylamino-4-oxo-10-propyl-4H-pyrano[3,2-g]-quinoline-2,8-dicarboxylic acid with a strongly basic cation.There is also described an aqueous solution of 6-methylamino-4-oxo-10-propyl-4H-pyrano[3,2-g]quinoline-2,8-dicarboxylic acid the solution being at a pH of from 4 to 8.The salts and solutions are useful as pharmaceuticals, e.g. in the treatment of allergies.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: October 26, 1982
    Assignee: Fisons Limited
    Inventors: David W. Payling, John L. Suschitzky