Detection of code-free files
CA 2491114 C · Owner: Microsoft Corporation · Inventors: Sheldon, Michael G.; Costea, Mihai; Seinfeld, Marc E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Detection of code-free files is described. According to one implementation an input file is parsed to recognize a file format. Contents of the input file are checked according to the recognized file format if available, in an effort to determine whether executable code might exist within the input file. A status is then sent in response to the checking.
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, 2004 and granted August 12, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 23, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.