Cantilever mount for rotating cylindrical magnetrons
CA 2089147 C · Owner: Bjornard, Erik J. · Inventors: Stevenson, David E.; Bjornard, Erik J.; Humberstone, Geoffrey H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for rotatably mounting a cylindrical magnetron (10) in a vacuum chamber (12). The apparatus includes a bearing housing (32) having one end extending into the vacuum chamber with the other end located outside the chamber. A drive shaft (48) is rotatably mounted in the bearing housing. Eaeh end (48a 48b) of , the drive shaft (48) extends beyond the housing (32). The cylindrical magnetron (10) is attached to the end (48b) of the drive shaft inside the chamber. A vacuum seal (50) is located in the bearing housing for sealing the drive shaft (48) to the housing (32). The drive shaft (48) is mounted in the housing (32) such that the load of the magnetron (10) is not transferred …
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 July 31, 1991 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2013.
- 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.