Patents by Inventor Boris M. Cumpelik

Boris M. Cumpelik 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).

  • Dialkyl malonates as organic sunscreen adjuvants
    Patent number: 4457911
    Abstract: Compositions containing an organic sunscreen and particular substituted dialkyl malonates adjuvants therefor are very effective in providing broad spectrum sunscreen protection.
    Type: Grant
    Filed: August 3, 1982
    Date of Patent: July 3, 1984
    Assignee: Van Dyk & Company Inc.
    Inventors: Donald E. Conner, Boris M. Cumpelik