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Expired Canadian patentCanada

Precious metal article, method for manufacturing same, moldable mixture for use in manufacture of same and method for producing moldable mixture

CA 2042845 C · Owner: Morikawa, Masaki · Inventors: Miyakawa, Masaki; Morikawa, Masaki; Kohno, Tohru

CIPO record

Overview

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Abstract From the Canadian patent

There is disclosed a precious metal article which is formed of a solid-phase sintered product of a precious metal powder. For manufacturing the precious metal article a moldable mixture, which contains a precious metal powder and a binder removable by sintering is shaped into a prescribed molded object and the, molded object is then subjected to sintering. The moldable mixture is produced by preparing a precious metal powder preparing, a jellylike cellulose binder by blending a cellulose with water and leaving for a prescribed period of time and blending, the precious metal powder and the jellylike cellulose binder together. The most preferable moldable mixture contains 50 to 90 % weight of …

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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

  • Filed May 17, 1991 and granted October 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 17, 1991
GrantedOctober 5, 1999
Term endedMay 17, 2011
Patent numberCA 2042845 C
Classification (IPC)B22F3/16 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedMay 17, 1991Patent grantedOct 5, 1999Term endedMay 17, 2011

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