Process for precipitating a tabular grain emulsion in the presence of a gelatino-peptizer and an emulsion produced thereby
CA 1284050 C · Owner: Maskasky, Joe E. · Inventors: Maskasky, Joe E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure The present invention is directed to a process of precipitating for use in photography a thin, tabular grain silver bromide or bromoiodide emulsion employing a gelatino-peptizer comprised of less than 30 micromoles of methionine per gram and to an emulsion produced by this process, A variety of advantage can be realized, including a wider range of permissible bromide ion concentrations during precipitation, thinner and/or larger diameter tabular grains, a reduced rod population, and novel tabular grain forms.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
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Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.