The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1999
Filed:
Jun. 05, 1998
Alan S Fitterman, Rochester, NY (US);
Robert E Dickerson, Hamlin, NY (US);
Peter J Kelch, Rochester, NY (US);
Ronald J Perry, Webster, NY (US);
David G Sherburne, Ontario, NY (US);
Nathan J Romano, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Black-and-white elements, such as radiographic films, can be processed in roomlight because they include certain light absorbing dyes and desensitizers. Processing of such elements can be achieved using a processing kit and a two-stage process carried out in the same light- and fluid-tight processing apparatus. In the first stage, development is initiated with a developing composition having a pH of from about 10 to about 12.5, and comprising an appropriate black-and-white developing agent and a sulfite. After an appropriate time, a non-sulfite fixing agent is introduced into the processing apparatus or container to provide a combined developing/fixing composition, and development and fixing are carried out simultaneously. The processing method is carried out quickly, usually within about 90 seconds. The presence of sulfite and high pH in both stages decolorizes or deactivates the particulate dyes. The processing kit includes the photographic element, a first vessel containing a developing composition, a second vessel containing fixing composition, and a hand-held container for holding one or more exposed photographic elements. The container has a manually actuated assembly for creating a vacuum within said container in order to draw developing and fixing compositions into said container to contact and develop the exposed photographic element.