Process for purifying halogenosilanes and halogenogermanes
CA 1079679 A · Owner: Wacker-Chemitronic Gesellschaft Fur Elektronik-Grundstoffe M.B.H. · Inventors: Pachnek, Rudolf; Lang, Winfried; Rath, Heinz-Jorg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Halogenosilanes and halogenogermanes which are contaminated by a boron-containing impurity are purified by treatment with an effective amount of a hydrated metal oxide or a hydrated silicate containing from about 3 to about 8% by weight of water, and then distilling the treated halogenosilane or halogenogermane at a temperature about 3° to about 15°C above its boiling temperature and at, atmosphere pressure.
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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 17, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 1997.
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Timeline
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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.