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Expired Canadian patentCanada

Filter apparatus for use with an x-ray source

CA 1233918 A · Owner: Maxwell Laboratories, Inc. · Inventors: Pearlman, Jay S.; Riordan, John C.

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure, Filter apparatus for use in x-ray equipment including a repetitively pulsed x-ray source a window, for transmitting x-rays generated by the source to an object to be irradiated, and a vacuum chamber containing the x-ray source and the filter apparatus. The filter apparatus includes a baffle for diffusing hot gases and directing them away from the window. The filter apparatus further includes an ultraviolet light absorber which overlies the window with respect to the x-ray source whereby undesirable components generated with the x-rays by the x-ray source are substantially eliminated prior to reaching the window. Also disclosed is a method of eliminating …

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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 March 8, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 8, 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.
FiledOctober 9, 1985
GrantedMarch 8, 1988
Term endedMarch 8, 2005
Patent numberCA 1233918 A
Classification (IPC)H01J35/00 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedOct 9, 1985Patent grantedMarch 8, 1988Term endedMarch 8, 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.