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Expired Canadian patentCanada

X-ray dispersive and reflective structures and method of making the structures

CA 1238988 A · Owner: Ovonic Synthetic Materials Company, Inc. · Inventors: Hart, Keith L.; Sztaba, Lennard; Ovshinsky, Stanford R.

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Abstract From the Canadian patent

X-ray dispersive and reflective structures and materials are provided which exhibit at least one third of the theoretical integral reflection coefficient for the structures in the range of interest without fluorescence or absorption edges. The materials can be thermally activated to control the desired properties, during or post deposition. The structures can be deposited by ion beam absorption techniques to form the structures in a precise manner. The index of the refraction of the structures can be continuously varying throughout the structures.

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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 July 5, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 5, 2005.
  • 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 29, 1984
GrantedJuly 5, 1988
Term endedJuly 5, 2005
Patent numberCA 1238988 A
Classification (IPC)G21K1/06

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 29, 1984Patent grantedJuly 5, 1988Term endedJuly 5, 2005

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