Patents by Inventor David L. Rigsbee

David L. Rigsbee 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).

  • Method of Cleaning Rubber from Runways that is Alkylphenol-Free
    Publication number: 20130269726
    Abstract: This invention relates to a method of cleaning rubber off of rubber-soiled runways that is free from the usual alkylphenol alkoxylates, which are becoming increasingly scrutinized and discouraged due to environmental considerations. Instead, it is surprisingly found that linear alcohol alkoxylates provide cleaning compositions that are actually more effective, while simultaneously providing an enhanced environmental profile to the formulation.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 17, 2013
    Applicant: CHEMTEK, INC.
    Inventors: Michael G. Kinnaird, David L. Rigsbee