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Expired Canadian patentCanada

Stereolithographic supports

CA 1339751 C · Owner: Hull, Charles William · Inventors: Hull, Charles William; Lewis, Charles William

CIPO record

Overview

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

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Abstract From the Canadian patent

An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, using information defining the object which is specially tailored to provide built-in supports for the object, reduce curl and distortion, and increase resolution, strength, accuracy, speed and economy of reproduction, the successive adjacent laminae representing corresponding successive adjacent cross-sections of the object, being automatically formed and …

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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 17, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2015.
  • 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 17, 1989
GrantedMarch 17, 1998
Term endedMarch 17, 2015
Patent numberCA 1339751 C
Classification (IPC)G03F7/20 +1 more

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedApril 17, 1989Patent grantedMarch 17, 1998Term endedMarch 17, 2015

Sources & verification

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