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:
Aug. 11, 1987
Filed:
Apr. 04, 1986
Leon L Vermeulen, Herenthout, BE;
Theofiel H Ghys, Kontich, BE;
Willy P De Smedt, Mechlin, BE;
Ludovicus H Vervloet, Kessel, BE;
Paul R Callant, Edegem, BE;
Agfa-Gevaert N.V., Mortsel, BE;
Abstract
Photographic silver complex diffusion transfer reversal process wherein the photographic material is spectrally sensitized with a dye corresponding to the general formula of the description, wherein said dye provides to the silver halide emulsion layer a spectral sensitivity mainly in the range of 400 to 500 nm and does not extends its spectral sensitivity substantially beyond 500 nm, and wherein the handling (exposure, development and diffusion transfer) of the photographic material during said steps is effected in yellow safelight corresponding to the light transmitted by a specified cut-off filter without causing fog.