Chloride containing emulsion and a process for emulsion preparation
CA 1284051 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 high aspect ratio tabular grain emulsion employing a dispersing medium containing a gelatino-peptizer comprised of less than 30 micromoles of methionine per gram and at least a 0.5 molar concentration of chloride ion. A wide range of chloride ion concentrations in the tabular grains can be achieved while avoiding the use of tabular grain thickening ripening agents and synthetic peptizers.
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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.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
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.