Object and method for providing efficient multi-user access to shared operating system kernal code using instancing
CA 2275970 C · Owner: Richardson, John J. · Inventors: Richardson, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for improving the performance of a multi-user operating system includes the steps of providing a kernal mode memory region in which instantiations of kernal objects associated with each user may be stored. Storing instantiations of kernal objects reduces code contention for commonly used kernal objects while allowing the instantiation to retain kernal mode protections.
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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
- Filed January 7, 1998 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2020.
- 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.