Patents by Inventor Stephen N. Blackburn

Stephen N. Blackburn 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).

  • Detergent compositions
    Patent number: 4923636
    Abstract: A liquid surfactant composition mobile at 20.degree.-80.degree. C. contains up to 80% anionic surfactant (sodium or potassium alkylbenzene sulphonate and/or alkyl sulphate), up to 80% nonionic surfactant and less than 10% by weight of water. The liquid composition may be sprayed onto a solid particulate absorbent material to form a detergent powder or component thereof.
    Type: Grant
    Filed: March 30, 1989
    Date of Patent: May 8, 1990
    Assignee: Lever Brothers Company
    Inventors: Stephen N. Blackburn, Francois Delwel, Elfed H. Evans
  • Detergent compositions manufacturing process by spraying anionic/nonionic surfactant mix
    Patent number: 4826632
    Abstract: A liquid surfactant composition mobile at 20.degree.-80.degree. C. contains up to 80% anionic surfactant (sodium or potassium alkylbenzene sulphonate and/or alkyl sulphate), up to 80% nonionic surfactant and less than 10% by weight of water. The liquid composition may be sprayed onto a solid particulate absorbent material to form a detergent powder or component thereof.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: May 2, 1989
    Assignee: Lever Brothers Company
    Inventors: Stephen N. Blackburn, Francois Delwel, Elfed H. Evans