Process and device for coating disc-shaped data storage media
CA 2237719 C · Owner: Weber, Klaus · Inventors: Kallis, Martin; Weber, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for coating disc-shaped data storage media (8) with a coating agent which is applied to the storage medium (8) via a coating nozzle (1) in its inner region and spread thereover by the centrifugal force arising when the storage medium (8) is rotated, it is possible to achieve a high coating rate reliably and with shorter coating times and with less complex manufacturing and maintenance if the coating nozzle (1) is moved quickly in an initial movement cycle close to the coating agent application point (12) and in a second movement cycle (11) slowly to the point of application (12). A device for implementing the process is given.
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 March 26, 1997 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2019.
- 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.