System for electronic repository of data enforcing access control on data search and retrieval
CA 2256936 C · Owner: Tchao, Sung Wei · Inventors: Tchao, Sung Wei; Mirlas, Lev; Bacha, Hamid
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When an electronic document is made available for review by other entities it , is often convenient, to store the document in a repository or database managed by a third party. A system is provided, in which the entities authorized by the originator of a document to access it in the data repository, are able to securely search for the document filed with a third party repository without having to trust, the administrator of the repository to provide accurate information on their access privileges. The, document originator the repository administrator and all entities with access privileges to data in, the repository have vault environments which are secure extensions of their …
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 23, 1998 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 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.