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Expired Canadian patentCanada

Isothermal growth of bubble domain garnet films

CA 1055818 A · Owner: International Business Machines Corporation · Inventors: Plaskett, Thomas S.; Ghez, Richard A.; Giess, Edward A.

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Abstract From the Canadian patent

Abstract of the Disclosure, A technique for reproducibly and uniformly growing magnetic bubble domain garnet films under isothermal conditions. In one situation a, fluxed melt is prepared such that the primary phase (first phase to crystallize) is orthoferrite rather than garnet. At the growth temperature and prior to substrate-melt contact the melt is saturated with, respect to orthoferrite and supersaturated with respect to garnet. During growth, the orthoferrite crystals are separated from the supersaturated garnet solution so that a high quality garnet film is grown on the substrate. After growth, the melt is reheated to above its liquidus (crystallization) temperature to dissolve the …

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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 June 5, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 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.
Filed—
GrantedJune 5, 1979
Term endedJune 5, 1996
Patent numberCA 1055818 A
Classification (IPC)C30B9/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJune 5, 1979Term endedJune 5, 1996

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