Process for the preparation of high chloride tabular grain emulsions (II)
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 12, 1993
Grant Date -
N/A
app pub date -
Sep 20, 1991
filing date -
Sep 20, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process of preparing a radiation sensitive high chloride high aspect ratio tabular grain emulsion is disclosed wherein silver ion is introduced into a gelatino-peptizer dispersing medium containing a stoichiometric excess of chloride ions a chloride ion concentration of less than 0.5 molar and a grain growth modifier of the formula: ##STR1## where Z.sup.2 is --C(R.sup.2).dbd. or --N.dbd.; Z.sup.3 is --C(R.sup.3).dbd. or --N.dbd.; Z.sup.4 is --C(R.sup.4).dbd. or --N.dbd.; Z.sup.5 is --C(R.sup.5).dbd. or --N.dbd.; Z.sup.6 is --C(R.sup.6).dbd. or --N.dbd.; with the proviso that no more than one of Z.sup.4, Z.sup.5 and Z.sup.6 is --N.dbd.; R.sup.2 is H, NH.sub.2 or CH.sub.3 ; R.sup.3, and R.sup.4 and R.sup.5 are independently selected, R.sup.3 and R.sup.5 being hydrogen, hydroxy, halogen, amino or hydrocarbon and R.sup.4 being hydrogen, halogen or hydrocarbon, each hydrocarbon moiety containing from 1 to 7 carbon atoms; and R.sup.6 is H or NH.sub.2.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully