Expired Canadian patentCanada
Preparation of high purity boron
CA 1311906 C · Owner: Albemarle Corporation · Inventors: Ibrahim, Jameel; Allen, Robert H.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Boron particles in bead-like form suitable for use in the preparation of doped, single crystal silicon can be prepared using a fluidized bed technique for chemical vapor deposition of a boron hydride, such as diborane or decaborane.
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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 December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 20, 1989
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1311906 C
Classification (IPC)C01B35/02 +1 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.