Method and device for assembling substrates
CA 2433427 A1 · Owner: Leonhardt, Stephan · Inventors: Leonhardt, Stephan; Speer, Ulrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method and device for simple low-cost uniform , assembly of at least two substrates (3 4), especially to form an optical data carrier. According to the invention, the substrates are disposed at a distance from each other in between two opposite plates (34,38) which can move in relation to each other and at least one flexible membrane (16) connected to one of the plates is moved by creating a difference in pressure on opposite sides of the membrane (16).
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
- Filed December 13, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2023.
- 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.