Antistatic layer for photographic elements
CA 1046755 A · Owner: Eastman Kodak Company · Inventors: Hartman, Ronald L.; Joseph, Douglas C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Photographic elements re protected against the adverse effects resulting from accumulation of static electrical charges by incorporating in the element an artistatic layer formed from an aqueous coating composition containing a water-soluble filmforming polymeric anionic polyelectrolyte in free acid form a, water-soluble film-forming cross-linkable polymeric binder and, an acid-acting cross-linking agent for the polymeric binder. The antistatic layer is useful with both photographic films and photographic papers employed in black-and-white photography or in color photography and will function as an effective anticurl layer as well as providing excellent protection against static. It is …
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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 January 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 1996.
- 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.