Patents by Inventor Hendrik Frederik Greyling

Hendrik Frederik Greyling 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).

  • Patent number: 8492314
    Abstract: The present invention provides a concentrate for dilution with water in the preparation of an agricultural composition for application to crops, soil or animals. The concentrate is recommended for use with agricultural chemicals whose agricultural activity varies with the pH of the water. It comprises an active ingredient and a combination of pH indicators for coloring the water, the pH indicators being selected so as to indicate different colors of spray water at different pH levels. The proportions of active ingredient and pH indicators are selected so that when the concentrate is added to water, the pH indicators indicate visually upper and lower pH limits for optimum activity of the agricultural chemical.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: July 23, 2013
    Assignee: AECI Limited
    Inventors: Hendrik Frederik Greyling, Hugo R Minnaar, Martin D Bloomberg
  • Publication number: 20100120619
    Abstract: The present invention provides a concentrate for dilution with water in the preparation of an agricultural composition for application to crops, soil or animals. The concentrate is recommended for use with agricultural chemicals whose agricultural activity varies with the pH of the water. It comprises an active ingredient and a combination of pH indicators for colouring the water, the pH indicators being selected so as to indicate different colours of spray water at different pH levels. The proportions of active ingredient and pH indicators are selected so that when the concentrate is added to water, the pH indicators indicate visually upper and lower pH limits for optimum activity of the agricultural chemical.
    Type: Application
    Filed: May 11, 2007
    Publication date: May 13, 2010
    Applicant: Plaaskem Intellectual Property (Proprietary) Limited
    Inventors: Hendrik Frederik Greyling, Hugo R. Minnaar, Martin D. Bloomberg