Expired Canadian patentCanada
Silver halide photographic light-sensitive material capable of providing a high contrast image
CA 1333017 C · Owner: Usagawa, Yasushi · Inventors: Ishii, Fumio; Usagawa, Yasushi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A silver halide photographic light-sensitive material having a support and provided thereon, at least one silver halide emulsion layer containing Compound I or Compound II represented by Formula I or II is disclosed; Formula I, Formula II,
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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 November 15, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 15, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 17, 1989
GrantedNovember 15, 1994
Term endedNovember 15, 2011
Patent numberCA 1333017 C
Classification (IPC)G03C1/10 +1 more
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.