Patents by Inventor Werner Douglas Steiner

Werner Douglas Steiner 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).

  • Storage-stable quaternary styryl dye solutions
    Patent number: 4063882
    Abstract: Concentrated storage-stable quaternary styryl dye solutions useful to dye paper, the solutions comprising, by weight,I. 20% to 40% of the dye ##STR1## wherein A is an anion, II. 30% TO 50% OF AT LEAST ONE OF ACETIC ACID AND PROPIONIC ACID,Iii. 10% to 40% of at least one acrylic acid and methacrylic acid, andIv. 3.3% to 4.5% of water.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: December 20, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Werner Douglas Steiner