Patents by Inventor Pooei John A.

Pooei John A. 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).

  • Diazotype materials with hydroxypropyl cellulose ether as anti-slip material
    Patent number: 4088492
    Abstract: Modifying the surface of a diazotype material by incorporating hydroxyalkyl cellulose ether into the diazotype sensitizing coating composition or coating the assembly with it so as to roughen the surface of the material thereby enabling nitrogen, which is liberated when the material is exposed to light, to escape from between the master and the diazotype material to prevent nitrogen accumulating between the two and hence avoiding slippage of one relative to the other.
    Type: Grant
    Filed: November 1, 1973
    Date of Patent: May 9, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventors: Pooei John A., Timothy D. Andrews