Patents by Inventor Christer Ernstson

Christer Ernstson 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).

  • Method for separating and recovering color developing agent
    Patent number: 4606827
    Abstract: A method and apparatus for separating and recovering a color developing solution from a color photographic processing solution with the aid of a cation exchange resin are disclosed. Said solution has a pH of not higher than 8.0 and is brought into contact with a cation exchange resin, which is in turn brought into contact with an alkali solution having a pH of not lower than 9.0.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: August 19, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Christer Ernstson, Yousuke Sadahiro