Process for manufacturing a product suitable for producing pure quartz glass as well as a process for producing pure quartz glass from this product and use of this product for growing piezoelectric crystals
CA 1284418 C · Owner: Sacher, Leo K. · Inventors: Lindemann, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for manufacturing a product from natural non-transparent quartz (milky quartz) this, product being suitable for producing pure quartz glass as well as a process for processing this product further to produce a shaped body made of pure quartz glass. It is also set forth that this product is suitable as a starting material for growing piezoelectric crystals in an autoclave.
Read the whole patent
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 May 28, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.