Glass vessel, in particular an ampoule, and a method for treating this glass vessel
CA 1320344 C · Owner: Schott Ruhrglas Gmbh · Inventors: Mannl, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a vessel, in particular in an ampoule having a prestress produced at a determined spot of the vessel and which permits an automatic opening of the vessel at this spot following scratching by means of a suitable tool this pre-, stress is produced exclusively by means of an earlier thermal treatment without the application of a tool; this prestress exhibits a stress profile in which an initially produced tensile stress ring which runs around the perimeter of, the glass vessel is overlapped at a spot by a point-shaped compressive stress zone that is produced subsequently.
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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 July 20, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 20, 2010.
- 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.