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Expired Canadian patentCanada

Photohardenable mixture

CA 1317811 C · Owner: Sondergeld, Manfred Adelhard Josef · Inventors: Sondergeld, Manfred Adelhard Josef; Bauer, Richard Douglas; Kraska, Ursula Annerose

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Abstract From the Canadian patent

Title PD-2344, PHOTOHARDENABLE MIXTURE Abstract, A positively working, tonable photoharden-, able mixture, as well as image-forming material prepared therefrom are described, which as essential components, contains a binder or mixture of binders a photohardenable compound, a photoinitiator or an initiator system and a multivalent metal compound to improve the toning properties of the material. 3936k

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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 18, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 18, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 23, 1987
GrantedMay 18, 1993
Term endedMay 18, 2010
Patent numberCA 1317811 C
Classification (IPC)G03F7/02 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 23, 1987Patent grantedMay 18, 1993Term endedMay 18, 2010

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.