Patents by Inventor Dorvin Brown

Dorvin Brown 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).

  • Methods and solutions for improvement of offset printing
    Patent number: 4013008
    Abstract: Disclosed are the uses of polyphosphate solutions as fountain solutions in the dampener roll systems of offset presses and as rub-up solutions for preparing offset plates for storage without corrosion. In the fountain solution application of the invention, the polyphosphate concentration may run from about 0.6 g/l to about 42 g/l; in the plate storage application of the invention it may run from about 6 g/l to about 66 g/l. Particular polyphosphates which are useful in the invention include sodium tripolyphosphate, sodium hexametaphosphate and aminomethylenephosphonate.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: March 22, 1977
    Inventor: Dorvin Brown