Wet rigid disk drive assembly with a conical spindle bearing
CA 2010836 C · Owner: Visqus Corporation · Inventors: French, William W.; Lemke, James U.; Lemke, James U.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a disk drive assembly in which one or more rotating rigid disks are enclosed in a "wet" operating environment in which a liquid lubricant is circulated from the surface of the rotating disks through, a wicking material within the disk drive assembly and, back to the head-disk interface. The wet environment supports the provision of open conical bearings in the spindle and actuator portions of the head-disk-actuator (HDA) of the disk drive assembly.
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 February 23, 1990 and granted May 10, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2012.
- 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.