Patents by Inventor Bernard G. Sheldon

Bernard G. Sheldon 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).

  • Quaternary ammonium group-containing polymers having antimicrobial activity
    Patent number: 4532128
    Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: July 30, 1985
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
  • Quaternary ammonium group-containing polymers having antimicrobial activity
    Patent number: 4482680
    Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.
    Type: Grant
    Filed: April 13, 1983
    Date of Patent: November 13, 1984
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson