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:
Jun. 15, 1976
Filed:
Dec. 27, 1972
Willy Joseph Vanassche, Aartselaar, BE;
Herman Alberik Pattyn, Kapellen, BE;
Hendrik Alfons Borginon, Mortsel, BE;
AGFA-GEVAERT N.V., Mortsel, BE;
Abstract
Direct-positive silver halide emulsions are described which have been fogged so that a test portion thereof when coated at a coverage of 0.50 to 5.50 g of silver per sq.m. gives a density below 0.50 upon processing without exposure for 6 min. at 20.degree.C in a developer I and an identical coated test portion gives a density that is at least twice that of the first test portion with a minimum of 0.50 upon processing without exposure for 3 min. at 20.degree.C in a developer II. The emulsions have high photographic speed and though fogged to a very low degree can yield direct-positive images of satisfactory density.